Dưới đây là phần chuyển đổi từ thì hiện tại hoàn thành sang quá khứ đơn cho các câu trong bài tập của bạn:

1. The last time I cooked was 3 years ago. -> I cooked 3 years ago.
2. I last saw him 2 days ago. -> I saw him 2 days ago.
3. I started writing my blog 2 months ago. -> I wrote my blog 2 months ago.
4. She began living in Danang when she was a child. -> She lived in Danang when she was a child.
5. I visited my grandparents 5 years ago. -> I visited my grandparents 5 years ago.
6. When did you start loving him? -> When did you love him?
7. The last time I went to the bar was 6 years ago. -> I went to the bar 6 years ago.
8. I took a bath 2 days ago. -> I took a bath 2 days ago.
9. It has been 9 years since she wrote to me. -> She wrote to me 9 years ago.
10. How long have you been here? -> How long were you here?
11. This is the first time I have seen such a beautiful girl. -> This was the first time I saw such a beautiful girl.

Nếu bạn cần thêm trợ giúp hoặc giải thích, hãy cho tôi biết!