a) She said she could do this exercise in 2 minutes ( Đổi I-->She, can-->could )

b) He said I might go home early that day ( đổi you--> I do là đại từ nhân xưng, may->might (lùi thì); today --> that day ( trạng từ chỉ time))

c) They said to me they would give me the money ( đổi we-->they; will-->would(lùi thì) ; you->me (tân ngữ))

d) The boy said we wouldn't pass the exam ( đổi won't--> wouldn't = would not)

e) Susan said she couldn't go then ( đổi I-->She do người nói là Susan; can't->couldn't ; now->then do là trạng từ chỉ time)

EX4:

1.Nam said he was going to meet his mother at the airport the following day

( đổi I-> he do người nói là Nam; my->his do đấy là mẹ của Nam; tomorrow  -> the following day do là trạng từ chỉ time)

2. Thomas said they would have a meeting the following week

( đổi we->they; will->would(lùi thì); next week->the following week do là trạng từ chỉ time)