English grammar tenses

1. He crashed his car shortly after he ………………………. it. bought. bought. has bought.

2. I …………………….. my work before I went out to play. finished. had finished. have finished.

3. He ……………………… ill for about a month before he died. was. has been. had been.

4. The show ………………………… before we reached the venue. has begun. had begun. began.

5. No one took care of the children after their parents …………………………. died. have died. had died.

6. We ………………………….. here since 1990. are living. were living. have been living. had been living.

7. He …………………………. here for 2 hours. is waiting. was waiting. has been waiting.

8. I ……………………… them for a long time. am not meeting. have not met. do not meet.

9. Although the driver was badly hurt, he could explain what ………………………. happened. have happened. had happened.

10. Neither of the boys ………………………….. arrived. has. have.

11. One of the students ………………………… missing. are gone. have gone. has gone.

12. How they ................................. is a mystery. escape. have escaped. escaped.