1. "If I catch the plane Il be trang chính by four o'clock", she said. 

-> She said (that) if she caught the plane she would be trang chính by four o'clock.

2. "You will recover quickly if you follow the doctor's advice", my mother said.

→ My mother said (that) I would recover quickly if I followed the doctor's advice.

3. "What would you bởi if you were laving a problem with grammar, Nga?"Huyen asked

-> Huyen asked Nga what she would bởi if she were having a problem wilth grammar

 4. "If I were yon, I'd stop smoking", she said lớn her brother.

→ She said lớn her brother (that) if she were him, she would stop smoking.

5. "If you heat ice, it melts" he said. He said (that) if I heat ice, it meltsBai 1:

Bài 2

1, would seen

2, had bought

3, didn’t speak

4, had faild

5, couldn’t drive

6, looked

7, were going

8, weren’t listening

Bài 3

1, she wouldn’t be able

2, there had been

3, not lớn go

4, lớn stay in bed

5, if I would be

6, if I saw

7, told Mary lớn stand up

8, was going lớn work

9, if he were

10, she had just come back