answer

1. He asked Peter if he lived in the country.

2. They wanted to know if I had seen Charles the morning before.

3. She wanted to know if they would get there on time.

4. The policeman asked if I didn't know the traffic regulations .

5. The coach wanted to know if they could do their best.

6. He asked if they were going to start work the next day.

7. She asked if they had ever been to America.

giải thích 

Yes, I do/ No, I haven’t/ Yes, perhaps I will,…Hoặc sử dụng 1 số các từ sau:Đối với Yes: Có thể dùng ‘Absolutely’, ‘Definitely’, ‘Certainly’, ‘Sure’,…Đối với No: Dùng ‘Not really’, ‘I don’t think so’, ‘Absolutely not’,…Ví dụ:1. Do you like sports?

1)......if I lived in the country

2).......if I saw Charles the previous morning (Yesterday morning ---> The previous morning)

3)......if we would get there on time

4).....me if I knew the traffic regulations

5)...... if I could do my best boys

6).... if we were going to start work the next day (Tomorrow ---> The next day)

7)..... if they had ever been to America 

(Form chung: S+asked (O)/wanted to know/... +if/whether+ S+V (Lùi thì)+....)