每句都有很多改法，取决于你想强调什么
When did you start living here?
2. It is twenty years since Ian lives here.
3. It is her who spent a lot of money on dresses.
4. It was a year ago that the supermarket opened.
5. It was ten minutes ago that the sports new began.
6. It was two weeks ago that they arrived at London.
7. The police has been here for half an hour.
8. How much does the new house cost him?
9. I have borrowed the book since last month.
10. He did not do his homework till late yesterday.
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