1. The last time I went to Ho Chi Minh City was ten years ago.
It has been ten years since I last went to Ho Chi Minh City.
2. Although he was very tired, he tried to help me with my homework.
Tired as he was, he tried to help me with my homework.
3. The car is too expensive. I can’t afford it.
It was such an expensive car that I couldn't afford it.
4. It's the first time I've been to New York.
I haven’t been to New York before.
5. “ You damaged my camera", said Hung to his sister.
Hung accused his sister of damaging his camera.
6. We didn't have any holidays until this summer.
It was not until this summer that we had some holidays.
7. If you hadn’t studied hard, you would have failed the exam.
Had you not study hard, you would have failed the exam.
8. Lan is pretty but Mai is prettier.
Mai is the prettier of the two girls.
9. This is the best film I’ve ever seen.
I’ve never seen a better film than this.
10. My school has over 800 students.
There are over 800 students in my school.