I'm tired. We (play) ___________ left-handed tennis for hours. Let's play right-handed for a while.

We started playing at eight a.m., and if we keep on like this, by noon we (play) ____________ left-handed for four hours!

Dr. Frankenstein (be) ____________ our head of research for fifteen years now.

Dr. Frankenstein (be) ____________ our head of research for fifteen years this year.

Dr. Frankenstein (be) ____________ our head of research for fifteen years when he died.

Dr. Frankenstein (be) ____________ our head of research for at least another fifteen years.

By the time I (earn) ____________ my degree, Dr. Frankenstein will have been our head of research for fifteen years.

By the time I (earn) ____________ my degree, Dr. Frankenstein had been our head of research for fifteen years.

I (explain) ____________ the facts of life to you over and over again! When will you understand?

I (read) ____________ for three hours, and I only have fifteen pages left!

I (read) ____________ for three hours, and I suddenly realized that I only had fifteen pages left!

If I (read on) ____________ for another three hours, I (modal, have) ____________ only about fifteen pages left.

When I (have) ____________ fifteen or so pages left, I’ll stop for a while.

By my bed-time last night, I (read) ____________ for three hours.

By my bed-time last night, I (read) ____________ at least fifteen pages.

How long (you, have) _____________ ear damage?

For how long (you, have) ____________ ear damage?

For how long after the Vandals in Sandals concert (you have) _____________ ear damage?

I (experience) ____________ constant emotional and digestive difficulties since the concert last year.

If I (take) ____________ your advice yesterday, I (be) ____________ rich today!

If I (be) ____________ you, I (not, put) ____________ my finger in that hole.

My dermatologist's office is next door. I HAVE WALKED there many times. I ALMOST NEVER TAKE a taxi.

I'm tired. We (play) HAVE BEEN PLAYING left-handed tennis for hours. Let's play right-handed for a while.

We started playing at eight a.m., and if we keep on like this, by noon we (play) WILL HAVE BEEN PLAYING / WILL HAVE PLAYED left-handed for four hours!

Dr. Frankenstein (be) HAS BEEN our head of research for fifteen years now.

Dr. Frankenstein (be) WILL HAVE BEEN our head of research for fifteen years this year.

Dr. Frankenstein (be) HAD BEEN our head of research for fifteen years when he died.

Dr. Frankenstein (be) WILL BE our head of research for at least another fifteen years.

By the time I (earn) EARN my degree, Dr. Frankenstein will have been our head of research for fifteen years.

By the time I (earn) HAD EARNED my degree, Dr. Frankenstein had been our head of research for fifteen years.

I (explain) HAVE EXPLAINED the facts of life to you over and over again! When will you understand?

I (read) HAVE BEEN READING for three hours, and I only have fifteen pages left!

I (read) HAD BEEN READING for three hours, and I suddenly realized that I only had fifteen pages left!

If I (read on) READ ON for another three hours, I (modal, have) SHOULD HAVE only about fifteen pages left.

When I (have) HAVE fifteen or so pages left, I’ll stop for a while.

By my bed-time last night, I (read) HAD READ / HAD BEEN READING for three hours.

By my bed-time last night, I (read) HAD READ at least fifteen pages.

How long (you, have) HAVE YOU HAD ear damage?

For how long (you, have) HAVE YOU BEEN HAVING ear damage? [NOTE: THIS SUGGESTS THAT THE DAMAGE IS ONGOING, NOT A PUNCTUAL INJURY]

For how long after the Vandals in Sandals concert (you have) DID YOU HAVE ear damage?

I (experience) HAVE EXPERIENCED / HAVE BEEN EXPERIENCING constant emotional and digestive difficulties since the concert last year.

If I (take) HAD TAKEN your advice yesterday, I (be) WOULD BE rich today!

If I (be) WERE you, I (not, put) WOULD NOT PUT my finger in that hole.

A) Every day, I (DO)________ my housework, and then I (DO)________ my homework. Ever since my childhood, I (ALWAYS, DO)________ things this way. I (GUESS) ________ I will never change, unless, of course, I (FINISH)________ my studies some day!

B) When I (WORK ON)____________ my thesis, I usually (USE) ___________ my Macintosh. After I (WRITE)____________ (PREP.) _______ about fifteen minutes, I (SAVE)____________ what I (DO) ____________ so that I (NOT, LOSE)____________ my text. Then, I (CONTINUE)_____________ to work on the text until I (SATISFY) ____________ my damn teacher's requirements. After I (DO) ______________ all of that, I (REVIEW)______________ my masterpiece to see if I (LIKE)_____________ what I (ACCOMPLISH)________________. My advice to any student who (USE)____________ a word-processor to do homework is to "save" the document every fifteen minutes. When you (ACQUIRE) _____________ this good habit, you will be sure not to lose hours of precious work because of a stupid &*@!! black-out! Black-outs always (COME)____________ like a thief in the night!

C) Every evening, I (WATCH)______________ the sky and (TRY) _____________ to count the stars. I (DO)____________ this regularly (PREP.)__________ last summer. Unfortunately, the stars (CHANGE)_________________ places every night, and I (ALWAYS, LOSE) _____________ count. In fact, they (CONSTANTLY, MOVE)_____________. Tonight, for instance, I (COUNT) _____________ at least 1,500 stars, but the western quadrant (ALREADY, DISAPPEAR)________________, and I (NOT, CAN)_____________ be sure how many there really are!

A) Right now, I (COMPOSE)____________ an exercise on conjugations for my students. I (WRITE)____________ this exercise (PREP.)________ at least thirty minutes. My friend Dr. Kim (READ)____________ over my shoulder while I (WRITE)_____________, and he (POINT OUT) ____________ the spelling mistakes and other foolish errors that I (ALWAYS, MAKE)______________ late at night. Of course, I (THANK) _____________ him from the bottom of my heart, because my students (NEVER, MISS) ______________ these little details! He (SIT) _____________ quietly next to me (PREP.)_________ we had supper. I think that he (GET, FED UP)______________. Maybe he (WANT) _____________ to go to the bathroom. I don't really think so, though, because he (GO) ______________ at least three times (PREP.)_____________ we finished eating. We (PATIENTLY, EXPERIMENT) ________________________ with all kinds of grammatical constructions (PREP.)______ this afternoon, and we (STILL, ATTEMPT)____________ to create an interesting and moderately difficult exercise for my class. Dr. Kim is a linguist who (STUDY)____________ language problems unceasingly, even in his sleep. I (BELIEVE) ____________ that must be a very strange life! This month, he (STUDY) ________________ the "BE + -ING" form. Fascinating, isn't it? He first became interested in this phenomenon when he heard an English student say, "Normally, I (GO)_____________ to university by car, but this morning, my dumb car broke down, so this afternoon I (GO)____________ to university by bus." The next week, poor Dr. Kim heard the same person say, "I (GO) ______________ to university by bus (PREP.)_______ my dumb car broke down, because I (STILL, NOT, FIX) _________________ it." I (NOTICE) __________________ several times that Dr. Kim (GET EASILY UPSET) ___________________ by bizarre grammatical problems like this. As a matter of fact, I think he (GET UPSET)______________ right now about this text! He (SPEND) _________________ the rest of the evening with us, but he has picked up his books and all his toys, and he looks like he (GO)_________________.

A) When I ponder all of the terrible things that I (DO) ____________ in my life in general, as well as the things I (DO) ____________ in my youth in particular, I wonder what the victims of my pranks (BECOME) ____________. Are they happy? (THEY, FORGIVE) ___________ me yet? One thing is certain: I (STILL, NOT, FORGET) ____________.

B) What (YOU, ACCOMPLISH) ___________ today? This morning, (YOU, WAKE UP) ____________ on time? (YOU, CUT YOURSELF) ____________ shaving? (YOU, START) ____________ your work-day at a reasonable hour? (YOU, DO) _____________ your housework yet? (YOU, FINISH) ____________ writing that letter that you (PROMISE) ____________ to send to your poor old mother? (YOU, HAVE) ____________ enough of this exercise yet??!

Last night, when I (FINISH) ____________ my homework, it (BE) ____________ about midnight, and I (WORK) _____________ for three hours and (COMPLETE) ____________ two different assignments. When I (GO) ____________ to the bathroom to throw water in my face, I (REMEMBER) ____________ that I had another assignment to complete for this morning. I (SAT) ____________ in my chair for a moment and (THINK) ____________ angrily about this blasted &ÿ@!! assignment that I (FORGET) ____________. After I (MEDITATE) ____________ on my own stupidity for a moment or two, I (MAKE) ____________ my mind and (START) ____________ the assignment. What could I do? My teacher is a dangerous sadist.

I (WASH) ____________ the dishes for my room-mate for too long. He is a wretched slob. This week, for example, I (HAVE TO) ____________ clean up his hair from the sink and the bathroom floor at least four times, and I (BE FORCED) ____________ to remove his garbage from the house because of the smell. Lately, I (HAVE) __________ more and more trouble with my word-processor, but he (NOT, OFFER) ____________ to help -even though he is supposed to be a computer-whiz. I (REALLY, FED UP) ____________ with this pimply-brained parasite.

A) Every day, I DO my housework, and then DO my homework. Ever since my childhood, I HAVE ALWAYS DONE things this way. I GUESS I will never change, unless, of course, I FINISH my studies some day!

B) When I WORK ON my thesis, I usually USE my Macintosh. After I WRITE /HAVE WRITTEN FOR about fifteen minutes, I SAVE what I HAVE DONE so that I DON’T LOSE my text. Then, I CONTINUE to work on the text until I SATISFY/HAVE SATISFIED my damn teacher's requirements. After I DO/HAVE DONE all of that, I REVIEW my masterpiece to see if I LIKE what I HAVE ACCOMPLISHED. My advice to any student who USES a word-processor to do homework is to "save" the document every fifteen minutes. When you ACQUIRE /HAVE ACQUIRED this good habit, you will be sure not to lose hours of precious work because of a stupid &*@!! black-out! Black-outs always COME like a thief in the night!

C) Every evening, I WATCH/?HAVE WATCHED the sky and TRY/?HAVE TRIED to count the stars. I HAVE DONE this regularly SINCE last summer. Unfortunately, the stars CHANGE /?HAVE CHANGED places every night, and I ALWAYS LOSE/?HAVE ALWAYS LOST count. In fact, they CONSTANTLY MOVE/HAVE CONSTANTLY MOVED. Tonight, for instance, I HAVE COUNTED at least 1,500 stars, but the western quadrant HAS ALREADY DISAPPEARED, and I CAN NOT be sure how many there really are!

A) Right now, I AM COMPOSING an exercise on conjugations for my students. I HAVE BEEN WRITING this exercise FOR at least thirty minutes. My friend Dr. Kim READS/IS READING over my shoulder while I WRITE/AM WRITING, and he POINTS OUT/IS POINTING OUT /HAS BEEN POINTING OUT the spelling mistakes and other foolish errors that I ALWAYS MAKE late at night. Of course, I THANK him from the bottom of my heart, because my students NEVER MISS these little details! He HAS BEEN SITTING quietly next to me SINCE we had supper. I think that he IS GETTING FED UP. Maybe he WANTS to go to the bathroom. I don't really think so, though, because he HAS GONE at least three times SINCE we finished eating. We HAVE BEEN PATIENTLY EXPERIMENTING with all kinds of grammatical constructions SINCE this afternoon, and we ARE STILL ATTEMPTING to create an interesting and moderately difficult exercise for my class. Dr. Kim is a linguist who STUDIES language problems unceasingly, even in his sleep. I BELIEVE that must be a very strange life! This month, he IS STUDYING/HAS BEEN STUDYING the "BE + -ING" form. Fascinating, isn't it? He first became interested in this phenomenon when he heard an English student say, "Normally, I GO to university by car, but this morning, my dumb car broke down, so this afternoon I AM GOING to university by bus." The next week, poor Dr. Kim heard the same person say, "I HAVE BEEN GOING to university by bus SINCE my dumb car broke down, because I STILL HAVE NOT FIXED it." I HAVE NOTICED several times that Dr. Kim GETS EASILY UPSET by bizarre grammatical problems like this. As a matter of fact, I think he IS GETTING UPSET right now about this text! He WAS GOING TO / WAS SUPPOSED TO SPEND the rest of the evening with us, but he has picked up his books I WENT to the bathroom to throw water in my face, I REMEMBERED that I had another assignment to complete for this morning. I SAT in my chair for a moment and THOUGHT angrily about this blasted &ÿ@!! assignment that I HAD FORGOTTEN. After I HAD MEDITATED on my own stupidity for a moment or two, I MADE UP my mind and STARTED the assignment. What could I do? My teacher is a dangerous sadist.

I HAVE BEEN WASHING the dishes for my room-mate for too long. He is a wretched slob. This week, for example, I HAVE HAD TO clean up his hair from the sink and the bathroom floor at least four times, and I HAVE BEEN FORCED to remove his garbage from the house because of the smell. Lately, I HAVE HAD /HAVE BEEN HAVING more and more trouble with my word-processor, but he HAS NOT OFFERED to help -even though he is supposed to be a computer-whiz. I HAVE REALLY GOTTEN FED UP with this pimply-brained parasite (MOST PEOPLE WOULD JUST SAY: I'M FED UP / GETTING FED UP)

My darling little Olga,

Just after I *(RECEIVE)_______________ your silly little letter, about two weeks ago, I (HAVE)_______________ a little "incident" with my room-mate. Since then, I (BE)_______________ a little busy and I (NOT, HAVE)_______________ the time to write back. Room-mates (BE) ____________ so much trouble, sometimes. Anyway, in the past two weeks, I (HAVE)_______________ four tests, and I *(HAVE) _______________ another one tomorrow. In addition, a "friend" of mine (STAY) _______________ with me (PREP.)_______ the past two or three months. I think that in general, you could say that she (BE) _______________ a very demanding person. She certainly (BE) _______________ a disgusting little twit (PREP.)_________ she has been here. I (GET)_______________ pretty fed up!

For example, even though I (WORK) _______________ this summer and I (SPEND) _______________ the whole day feeding and cleaning the &@*ÿ!! animals, she *(INSIST)_______________ that I take her absolutely everywhere in town. So far, we (GO)_______________ to the botanical gardens, the rodeo, the planetarium, the slaughterhouse, the Nova Scotia Tower, the Museum of Dead Cultures, and at least a dozen taverns. We (STILL, NOT, FIND)_______________ a tavern or restaurant that serves the kind of root-beer she likes. Every day, she makes me take her to some damn thing or another. Yesterday we (WATCH) _______________ a wrestling match in the park, and she (REFUSE) _______________ to leave until the winner (BE DECLARED)_____________. It was a big fat guy in red pajamas and a black mask. What a waste of time! Between (SHOW) _______________ her the city and (STUDY) _______________ for my $?&!!ÿ exams, recently I (HAVE) _______________ almost no time for anything else.

Right now, I (HEAR) _______________ her blowing her nose in the bathroom. I can tell that she *(FUTURE: BE)_______________ in there for a pretty long time, so I (FUTURE: TRY)_______________ to finish this letter tonight. It is 3:00 a.m., and I (SIT)_______________ at my desk. I usually can't sleep when someone in the bathroom (MAKE) _______________, well, you know, "certain noises". I think I (FUTURE: TIE HER UP) _______________ and put her in a taxi, and send her to St-Lambert. Or maybe I (FUTURE: TELL) _______________ the driver to take her to the bus station and leave her there!

Well, I guess that I (TALK)___________________ enough about all my problems. What about yours? (YOU, STILL, HAVE)___________________ that ugly boy-friend who (TALK)____________________ with his mouth full? (YOU, FEEL BETTER) __________________ (PREP.)_______ the doctor (GIVE) _______________ you Prozac? (YOUR DOG, DIE) __________________ yet? She was pretty sick, wasn't she? She (JUST, CELEBRATE) __________________ her twelfth birthday the last time I (SEE) __________________ her. Thank heavens that in my whole life, I (NEVER, HAVE) __________________ dogs- it would make me too sad to have a dying dog. How many dogs (YOU, HAVE) ____________________, in all? You told me once how many (YOU, HAVE) ____________________ before you (GET) __________________ this one, but I can't remember. I hope you aren't feeling too depressed about your poor old dog. Lately, I (FEEL) _______________ kind of "down" too, so I know what it's like.

I'm looking forward to (HEAR) ____________ from you soon,

Love, Ludmilla

My darling little Olga,

Just after I *(RECEIVE) received /had received your silly little letter, about two weeks ago, I (HAVE) had a little "incident" with my room-mate. Since then, I (BE) have been a little busy and I (NOT, HAVE) haven’t had the time to write back. Room-mates (BE) are /can be so much trouble, sometimes. Anyway, in the past two weeks, I (HAVE) have had four tests, and I *(HAVE) have / am having / will ge having another one tomorrow. In addition, a "friend" of mine (STAY) has been staying with me (PREP.) for the past two or three months. I think that in general, you could say that she (BE) is / can be a very demanding person. She certainly (BE) has been a disgusting little twit (PREP.) since she has been here. I (GET) am getting pretty fed up! For example, even though I (WORK) am working this summer and I (SPEND) spend the whole day feeding and cleaning the &@*ÿ!! animals, she *(INSIST) insists / has been insisting / keeps insisting that I take her absolutely everywhere in town. So far, we (GO) have gone to the botanical gardens, the rodeo, the planetarium, the slaughterhouse, the Nova Scotia Tower, the Museum of Dead Cultures, and at least a dozen taverns. We (STILL, NOT, FIND) still haven’t found a tavern or restaurant that serves the kind of root-beer she likes. Every day, she makes me take her to some damn thing or another. Yesterday we (WATCH) watched a wrestling match in the park, and she (REFUSE) refused to leave until the winner (BE DECLARED) had been declared. It was a big fat guy in red pajamas and a black mask. What a waste of time! Between (SHOW) showing her the city and (STUDY) studying for my $?&!!ÿ exams, recently I (HAVE) have had / have been having almost no time for anything else. Right now, I (HEAR) hear / can hear her blowing her nose in the bathroom. I can tell that she *(FUTURE: BE) is going to be / she’ll be in there for a pretty long time, so I (FUTURE: TRY) will try to finish this letter tonight. It is 3:00 a.m., and I (SIT) am sitting at my desk. I usually can't sleep when someone in the bathroom (MAKE) makes / is making, well, you know, "certain noises". I think I (FUTURE: TIE HER UP) am going to tie her up and put her in a taxi, and send her to St-Lambert. Or maybe I (FUTURE: TELL) will tell the driver to take her to the bus station and leave her there!

Well, I guess that I (TALK) have talked enough about all my problems. What about yours? (YOU, STILL, HAVE) do you still have that ugly boy-friend who (TALK) talks with his mouth full? (YOU, FEEL BETTER) have you been feeling better (PREP.) since the doctor (GIVE) gave / has been giving / started giving you Prozac? (YOUR DOG, DIE) Has your dog died yet? She was pretty sick, wasn't she? She (JUST, CELEBRATE) was just celebrating / had just celebrated her twelfth birthday the last time I (SEE) saw her. Thank heavens that in my whole life, I (NEVER, HAVE) have never had dogs- it would make me too sad to have a dying dog. How many dogs (YOU, HAVE) have you had, in all? You told me once how many (YOU, HAVE) you had had before you (GET) geting this one, but I can't remember. I hope you aren't feeling too depressed about your poor old dog. Lately, I (FEEL) have been feeling kind of "down" too, so I know what it's like.

I'm looking forward to (HEAR) hearing from you soon, Love, Ludmilla

A- Hi, how are you! ______________________(HEAR, YOU) about Julius?

B- No, what ______________________(HAPPEN)?

A- Well, yesterday, while he ______________________(WALK) home from his... well, you know, his "shop"...

B- Yes, yes? Then what?

A- ...a cyclist ______________________(HIT) him from behind. After she ______________________(KNOCK) him over, she ______________________ (FALL) off her bike and ______________________(BREAK) her leg.

B- Son of a gun!! Are you serious? How could she have been so careless? What a turkey! ______________________(DRINK, SHE)?

A- No, but it ______________________ (MODAL OF POSSIBILITY + BE) partly Julius' fault, too. He says that he can remember __________________ (WALK) out into the street, but nothing else. He might have forgotten ______________________(LOOK) both ways before crossing.

B- But what about the cyclist? Why was she in such a hurry?

A- That's another crazy story. Apparently she ______________________(FIND OUT, JUST) that her mother ______________________(COME) to visit her for the weekend, and she wanted to get back to her apartment to "clean up", if you know what I mean!

B- Ha! I can guess!

A- Anyway, both she and Julius are still in hospital.

B- Is there any chance that they will "hit it off"?

A- I think they already have!!

B- Ha-ha, very funny. You know, I ______________________(GO) into town this evening to leave some trophies at poor Julius's shop. I guess I'll go see him in the hospital instead.

A- Sure, that's a good idea. What are friends for, anyway? When you ______________________(SEE) him, will you please give him these books? He told me just the other day that he wanted to read something to take his mind off his work, and that he ______________________(READ, NEVER) anything by Sartre. I'm sure he'll enjoy La nausée and Les mouches.

B- O.K. buddy, no problem. Julius is lucky to have friends like us.

A- Hi, how are you! Have you heard (HEAR, YOU) about Julius?

B- No, what happened (HAPPEN)?

A- Well, yesterday, while he was walking (WALK) home from his... well, you know, his "shop"...

B- Yes, yes? Then what?

A- ...a cyclist hit (HIT) him from behind. After she knocked / had knocked (KNOCK) him over, she fell (FALL) off her bike and broke (BREAK) her leg.

B- Son of a gun!! Are you serious? How could she have been so careless? What a turkey! Had she been drinking / Was she drunk? (DRINK, SHE)?

A- No, but it could / may (MODAL OF POSSIBILITY + BE) partly Julius' fault, too. He says that he can remember walking (WALK) out into the street, but nothing else. He might have forgotten to look (LOOK) both ways before crossing.

B- But what about the cyclist? Why was she in such a hurry?

A- That's another crazy story. Apparently she had just found out (FIND OUT, JUST) that her mother was coming (COME) to visit her for the weekend, and she wanted to get back to her apartment to "clean up", if you know what I mean!

B- Ha! I can guess!

A- Anyway, both she and Julius are still in hospital.

B- Is there any chance that they will "hit it off"?

A- I think they already have!!

B- Ha-ha, very funny. You know, I was going / was going to go (GO) into town this evening to leave some trophies at poor Julius's shop. I guess I'll go see him in the hospital instead.

A- Sure, that's a good idea. What are friends for, anyway? When you see (SEE) him, will you please give him these books? He told me just the other day that he wanted to read something to take his mind off his work, and that he had never read (READ, NEVER) anything by Sartre. I'm sure he'll enjoy La nausée and Les mouches.

B- O.K. buddy, no problem. Julius is lucky to have friends like us.

Yesterday, I (FINISH) ____________ on time. I was very proud, because I (NEVER, FINISH) ____________ on time before in my whole life! Today, I (WORK) ____________ more efficiently than usual. The morning is not over yet, and I (ALREADY, READ) ____________ three articles! Up until recently, I (ALWAYS, ASSUME) ____________ that when you (GET OLD) ____________, your brain stops (WORK) ____________ as well as it used to, but now, I (BELIEVE) ____________ that it is the opposite. Anyway, today, things (GO) ____________ great! I can tell that it (BE) ____________ a very productive week, too. I (FEEL) ____________ more energetic than usual (PREP.) ____________ the doctor (GIVE) ____________ me vitamin B-12 shots every week. I (HAVE) ____________ ten shots by now, and the energy (COME) ____________ out my ears!

Yesterday, I (FINISH) finished on time. I was very proud, because I (NEVER, FINISH) had never finished on time before in my whole life! Today, I (WORK) am working / have been working more efficiently than usual. The morning is not over yet, and I (ALREADY, READ) have already read three articles! Up until recently, I (ALWAYS, ASSUME) had always assumed / always assumed that when you (GET OLD) get old, your brain stops (WORK) working as well as it used to, but now, I (BELIEVE) believe that it is the opposite. Anyway, today, things (GO) are going / have been going great! I can tell that it (BE) is going to be / will be a very productive week, too. I (FEEL) (1) have been feeling / (2) feel more energetic than usual (PREP.) (1) since / (2) because the doctor (GIVE) has been giving me vitamin B-12 shots every week. I (HAVE) have had_ ten shots by now, and the energy (COME) is coming out my ears!