Put the verbs in bracket into the Past Indefininite or the Past Perfect Tense.
1)I (not yet to do) half the work when he came in.
2)She told me everything about him after he (to leave).
3)I was sorry that i ( to hurt) him.
4) We ( to undestand ) if after the teacher (to explain) it to us.
5) He already ( to learn) French efore he left for Frence.In France he soon ( to remember) all he (to learn).
6) I asked him what countries he (to visit).
7)She said that she (to pass) her examination successfully.
8) We ( to hear) that the plane (to crush) just over the airport.
9) The new bus-driver ( to have) an accident after he ( to drive) a few yards.
10) After she (to lock) and (to bolt) all the doors she (to go) to bed.
11) The students (to do) the exercises very well after the teacher (to show) how to.
12)When the plane (to land) , the sun (to set).
13)The taecher (to give) back the exercise-books after he (to correct) them.
14)When i was 20 , i (to go) to Moscow to stude English.At that time i thought i ( to know) English quite well because i (to study) it for nearly ten years.
15)Mr.Brown said he (to be) in London before

1) I (had not yet  done) half the work when he came in. 2) She told me everything about him after he (had left). 3) I was sorry that i ( had hurt) him. 4) We ( would have undestood ) if after the teacher (had explained) it to us. 5) He had already ( learnt) French before he left for Frence. In France he soon (  remembered) all he (had learnt). 6) I asked him what countries he (had visited). 7) She said that she (had passed) her examination successfully. 8) We (  heard) that the plane (had crushed) just over the airport. 9) The new bus-driver (  had) an accident after he ( had driven) a few yards. 10) After she (had locked) and ( bolted) all the doors she (went) to bed. 11) The students ( did) the exercises very well after the teacher (had shown) how to. 12) When the plane (had landed), the sun ( set). 13) The taecher ( gave) back the exercise-books after he (had corrected) them. 14) When i was 20 , i (went) to Moscow to stude English. At that time i thought i ( knew) English quite well because i (had studied) it for nearly ten years. 15) Mr. Brown said he (had been) in London before.