1. Nam said he had to finish his homework before 7o'clock

have to->had to

2.Thu said all the students would have a meeting the following week

will->would,next week->the following week

3.Phong said her parents were very proud of his good marks

4.The teacher said all the homework had to be done careful

5.Her father said to her she could go to the movie with her friend

6.Hoa said she might visit her parents in the summer

7The teacher said we could collect old books for the poor students

8She said he didn't buy this book

9The boys said they had to try our best to win the match

1 . Nam said he had to finish his homework before 7o'clock

have to->had to

2 .Thu said all the students would have a meeting the following week

will->would,next week->the following week

3 .Phong said her parents were very proud of his good marks

4 .The teacher said all the homework had to be done careful

5 .Her father said to her she could go to the movie with her friend

6 .Hoa said she might visit her parents in the summer

7 The teacher said we could collect old books for the poor students

8 She said he didn't buy this book

9 The boys said they had to try our best to win the match