1. I don’t know why she hasn't come.

2. She asks why you haven't laid the table.

3. I’d like to know why he hasn't answered my letter.

4. Tell me why you have quarrelled.

5. She doesn’t say why she has refused to take this work.

6. I can’t guess why they have parted.

7. She wants to know where they have gone to.

8. I wonder where they have lived all the time.

9. He can’t say where the dog has appeared from.

10. I just ask where you have been since last Saturday.