giúp với !!!!!!!!!!!!!!!!!!!!!!!!!!

1. Before he went to university, he had taken a gap year. -> before QKĐ, QKHT

2. Where had you been before you came home? -> QKHT before QKĐ?

3. There had been many trees along the street before people cut them down. -> QKHT before QKĐ

4. Jim had been very upset before Mary cheered him up. -> QKHT before QKĐ

5. She told me yesterday that she had not finished her assignment yet. -> câu tường thuật, lùi thì (HTHT -> QKHT)

6. What happened after Jim had proposed to Jane? -> QKĐ after QKHT

7. Had you eaten dinner before you came here? -> QKHT before QKĐ

8. Peter had traveled a lot before his leg was seriously injured in an accident. -> QKHT before QKĐ