1_ By the time we reach the station , the train had left

2_ I didn't meet my boss . When I arrived , he leaves

3_ He had cleaned the office after he had finished his work

4_ I drove the car until the mechanic had mended it

5_ Osama had finished his homework before he goes to the cinema

6_ When they went to the cinema , the film has started

7_ I don't play the match till I had done my homework

8_ No sooner had we gone out than it will start to rain

9_ The play started as soon as we reach the theatre

10_ She didn't prepare lunch until she has enough sleep

11_ Having had received the prize , I was congratulated

12_ No sooner he had arrived than his friend left

13_ What were you doing when I phone you yesterday ?

14_ During we were watching the program , the light went out

15_ What do you do yesterday morning ?

16_ He gave me his telephone number after I asked him twice

17_ Before I had put on my clothes , I had had a bath

18_ Sameh told me that he has already painted his flat

19_ We returned home when we leave school yesterday

20_ After had read the book , I returned it to the library

1-reached
2-he had left
3-cleaned
4-i didnot drive
5-went
6-had started
7-didnot
8-started
9-had reached
10-had had
11-having received
12-had he
13-phoned
14-while
15-what were you doing
16-had asked
17-i put
18-had
19-left
20-after i had read