Đáp án:

1. Have they arrived already?
2. Lucy has run 2000 metres today.
3. I have been cleaning all morning – I’m fed up!
4. How long have you known Simon?
5. I have been drinking more water lately, and I feel better.
6. Sorry about the mess! I have been baking.
7. How many times have you taken this exam?
8. He has eaten six bars of chocolate today!
9. Julie has cooked dinner. Let’s go and eat!
10. The students have finished their exams. They’re very happy.
11. The baby’s face is really dirty! What has he been eating?
12. Iona is exhausted these days. She has been working too hard recently.
13. Luke has never been abroad.
14. I have been waiting for three hours already !
15. Have you finished your homework yet?
16. How long have you been a lawyer?
17. I have been reading your book all day. It’s very interesting, but I’m only on chapter 2.
18. She has drunk ten glasses of water!
19. I have had my dog for sixteen years.
20. Help, I have lost my wallet! How can I get home? 

Giải thích:

Câu 1, 2, 4 7, 8, 9, 10, 13, 15, 16, 18, 19, 20 chia động từ thì hiện tại hoàn thành.

Các câu còn lại thì hiện tại hoàn thành tiếp diễn vì các sự việc xảy ra ở quá khứ nhưng vẫn còn đang tiếp diễn, hoặc sự việc đã kết thúc nhưng để lại kết quả ở hiện tại.

1. Have they arrived already?

→ththt
2. Lucy has run 2000 metres today.

→ththt
3. I have been cleaning all morning – I’m fed up!

→ththttd
4. How long have you known Simon?

→ththt
5. I have been drinking more water lately, and I feel better.

→ththttd
6. Sorry about the mess! I have been baking.

→ththttd
7. How many times have you taken this exam?

→ththt
8. He has eaten six bars of chocolate today!

→ththt
9. Julie has cooked dinner. Let’s go and eat!

→ththt
10. The students have finished their exams. They’re very happy.

→ththt
11. The baby’s face is really dirty! What has he been eating?

→ththttd
12. Iona is exhausted these days. She has been working too hard recently.

→ththttd
13. Luke has never been abroad.

→ththt
14. I have been waiting for three hours already !

→ththttd
15. Have you finished your homework yet?

→ththt
16. How long have you been a lawyer?

→ththt
17. I have been reading your book all day. It’s very interesting, but I’m only on chapter 2.

→ththttd
18. She has drunk ten glasses of water!

→ththt
19. I have had my dog for sixteen years.

→ththt
20. Help, I have lost my wallet! How can I get home? 

→ththt

lưu ý:

ththt: thì hiện tại hoàn thành

ththttd: thì hiện tại hoàn thành tiếp diễn

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@chay31