Rewrite the following sentences

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V/ Rewrite the following sentences:
1. I last saw him two years ago.
→ I haven't seen him for two years.
2. She began to play volleyball when she was eight.
→ She has begun to play volleyball since she was eight.
3. I have taught English at Nguyen Khuyen school for sixteen years.
→ I started to teach English at Nguyen Khuyen school.
4. We haven't met each other for three years.
→ It's three years since ...
5. I haven't been to the dentist's for two years.
→ It's two years since I ...
6. It's three months since she started learning French.
→ She has ...
7. When did you start learning English?
→ How long is ...
→ How long ago ...