11. The children said that they had been waiting for half an hour

have been waiting: hiện tại hoàn thành tiếp diễn

Chuyển thành tường thuật=> quá khứ hoàn thành tiếp diễn

12. Susan told her husband that he didn't know what he was saying

don't know: hiện tại đơn; are saying: hiện tại tiếp diễn

Chuyển thành tường thuật=>quá khứ đơn; quá khứ tiếp diễn

13. Mike told Sue that he had already spoken to her parents

have already spoken=> hiện tại hoàn thành

Chuyển thành tường thuật=>quá khứ hoàn thành

thay I thành he, your thành her vì câu này là ngôi thứ 3

14. Sheila said that she would tell everyone the news that morning

will=> would, this morning thành that vì đang tường thuật lại

15. Mai told Hoa that she couldn't hear what the teacher was saying

can't=> couldn't, is saying=> was saying

11. The children said they had been waiting for half an hour.

12. Susan told her husband he didn't know what he was saying.

13. Mike told Sue he had already spoken to her parents.

14. Sheila said she would tell everyone the news that morning.

15. Mai told Hoa she couldn't hear what the teacher was saying.