Chia các động từ sau đây sang thì hiện tại hoàn thành hoặc hiện tại hoàn thành tiếp diễn
1. I (try) to learn English for years.
2. I (wait) for two hnours, but she (not come ) yet.
3. She (read) all the works of Dickens. How many have you (read)?
4. I (wait) hare nearly half an hour for my gir-friend Joana; do you think she (forget) to come?
5. Mary (rest) in the garden all day because she (be) ill.
6. Although john (study) at the university for five years he (not get) his degree yet.
7. Jack (go) to switzeland for a holkiday; I never (be) there.
8. We (live) for the last five months, and just ( decide) to move.
9. You alrerady (drink) 3 cups of tea since I (sit) here.
10. That book (lie) on the table for weeks. You (not read) it yet?
11. You (be) asleep all the morning? I (ring) the bell for the last 5 minutes.
12. She (work) so hard this week that she (not have) time to go out.
13. He (write) a novel for the last two months. But she (not finish) yet.
14. My watch (go) for three days and it (not run down) yet.
15. He (lose) his book. He (look) for it all the morning, but it (not turn) up yet.
16. He (not be) here since Christmas. I wonder where he (live) sine then.