3. Andrew said he didn't want to so swimming.
4. They said they were leaving on Friday.
5. They said they had had lunch in Luigi's restaurant.
6. He asked us if we would stay with them.
7. My mom asked me if I had finished my homework.
8. I asked her what she thought of the flat.
9. Mrs.Smith asked me how I went to school.
10. She asked me when I was moving in.

3. Andrew said that he didn't want to go swimming     (Hiện tại đơn -> quá khứ đơn)
4. Thay said they were leaving on Friday                       (Hiện tại tiếp diễn -> quá khứ tiếp diễn)
5. They said that they had had lunch in Luigi's restaurant     (Quá khứ đơn -> quá khứ hoàn thành)
6. He asked us whether we would stay with them          (Will -> Would) 
7. My mom asked me whether I had finished my homework     (Hiện tại hoàn thành -> quá khứ hoàn thành)
8. I asked her what she thinked of the flat               (Hiện tại đơn -> quá khứ đơn)
9. Mrs. Smith asked me how I went to school        (Hiện tại đơn -> quá khứ đơn)
10. She asked me when I was moving in     (Hiện tại tiếp diễn -> quá khứ tiếp diễn)