I. Rewrite the sentences using the present perfect or the present perfect continuous:

1. I have discussed my research proposal with my professor since the beginning of my course.

2. Nam has studied E for 2 years.

3. I have learned how to play the piano for eight months.

4. He has attended online vocational courses twice: in 2012 and in 2013.

5. They have visited this college three times.

6. The British Council has used IELTS as an international standardised test of English for non-native

English language speakers for a long time.

7. She has done her research project since last month.

8. The university has built a new campus since May.

- Thì hiện tại hoàn thành: S+have/has (not) + Vpp +O

- Thì hiện tại hoàn thành tiếp diễn: S+have (not) been +Ving +O