V. Viết lại câu

1. We haven't visited his house since we finished school.

( S + have/has + NOT + V3/-ed + since/for …
⇔ S + last + V2/-ed + when + S + V )

2. She has never bought us a present before.

( This is the first time + S + have/has + V3/-ed
⇔ S + have/has + never (not) + V3/-ed + before )

3. It's the first time i have ever been to the California. 

( It's is the first time + S + have/has + P2

=> S +have/has + never + P2 + before )

4. They have never invited us to lunch before. 

( It's is the first time + S + have/has + P2

=> S +have/has + never + P2 + before )

5. It's the first time he has written a novel.

( It's is the first time + S + have/has + P2

=> S +have/has + never + P2 + before )

6. We have never had bad weather before.

( It's is the first time + S + have/has + P2

=> S +have/has + never + P2 + before )

7. I last been in hospital a week ago.

( S + last + Ved + time+ ago

=> It’s + time+ since + S + last + Ved. )

8. I haven't got a letter from him for a year.

( S + have/ has +not+ for + time 

=> S + last + Ved + time+ ago )

9. I haven't phoned him for a month.

( It’s + time+ since + S + last + Ved.

=> S + have/ has +not+ for + time )

10. We haven't visited him since June.

( S + have/ has +not+ for + time 

=> S + last + Ved + time+ ago )