1. They / wait / manager / since / 8 o’clock. 2. He / look after / younger brother / since / father / die. 3. She / have / Italian penfriend / since / she / 12 years old. 4. We / not / see / him / since / he / win / gold medal. 5. he / ever / take part / online auction? 6. How long / Mai / learn / English? 7. It / not / rain / this part / desert / 1936. 8. I / awake / 5 o’clock / this morning.

1. They have waited for the manager since 8 o'clock.

dấu hiệu : since `->` Dùng HTHT

2. He has taken after his younger brother since his father died.

dấu hiệu : since `->` Dùng HTHT

3. She has had a Italian penfriend since she was 12 years old.

dấu hiệu : since `->` Dùng HTHT

4. We haven't seen him since he won the gold medal.

dấu hiệu : since `->` Dùng HTHT

5. Has he ever taken part in an online audition?

dấu hiệu : ever `->` Dùng HTHT

6. How long has Mai learnt English?

dấu hiệu : How long `->` Dùng HTHT

7. It has not rained in this part of the desert since 1936.

dấu hiệu : since `->` Dùng HTHT

8. I have been awaken since 5 o'clock this morning.

dấu hiệu : since `->` Dùng HTHT