1.you/ever/see/UFOs ?
-> Have you ever seen UFOs?

2.when/you/last/phone/him ?
-> When did you last phone him?

3.we/use/these energy-saving bulbs/for/a long time.
-> We have used these energy-saving bulbs for a long time.

4.i/just/visit/my home town/where/i/be/born.
-> I have just visited my hometown where I was born.

5.they/not/see/their teachers/since/2005.
-> They haven't seen their teachers since 2005.

6.i/begin/study/english/when/I/be/eight/years old.
.-> I began to study English when I was eight years old.

7.she/be/very busy/since/get/a part time job.
-> She has been very busy since she got a part time job.

8.you/ever/be/Ba Na hill ?
-> Have you ever been to Ba Na Hills?
yes,I/go there/some months/ago.
-> Yes, I went there some months ago

chúc học tốt

1. Have you ever seen

2. hasn't checked

3. did you last phoned

4. have eaten

5. have used

6. have just visited / was

7. haven't seen

8. began / was

9. has been / got

10. Have you ever been / went

                       Chúc bn học tốt!!!