1.he(cross) ……………………….the street when i (see)……. him yesterday .
2. he(leave)…………….home 2 weeks ago and we (not hear)…………from him since
3.what …….you(do)…….. at that time last week ?
4.last sunday,an(watch)……………..tv when tom (come)……….here
5.john(do)……………..his homework already
6.yesterday while i(water)………………the garden ,it(begin)………to rain
7.he (read)……………..53 pages so far
8…………….he(write)……………..a novel at present?
9.they(not speak)……………………to each other since thay quarreled
10.listen!somebody(knock)………………………the door
11. please don’t say anything while i(learn)……………….my lesson
12.up to now,i(do)……………………every exercise in this book
13.mrs green(take)………………..alice to the dentist’s many times
14
1. crossed/ saw
2. left/ haven’t heard
3. did….do
4. watched/ came
5. has done
6.watered/ began
7. has read.
8. have…written
9. haven’t speaken
10. is knocking
11. learned
12. have done
13. has taken
1. crossed/saw
2. left/haven’t heard
3. did/do
4. was watching/came
5. has done
6. were watering/was begining
7. has read
8. Has/written
9. haven’t spoken
10. is knocking
11. am learning
12. have done
13. has taken