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1. Many doctors say that teenagers undergo many physical and mental changes during their puberty.

2. Sometimes my mother tells me that I don't have to be so tense.

3. Peter said that he was looking forward to his grandfather's gift.

4. Peter said that if he passed that test, his father would buy him a new skateboard.

5. I told my teacher that I had forgotten to do my homework.

6. Jim said that Mr. Brown owned two cars and three houses.

7. She said to me that she couldn't do it by herself.

8. My mother said that she would go on a business trip the following week.

9. My manager said that someone had broken into our office the day before.

10. He told me that I might have trouble if I didn't do my homework

Câu tường thuật -> lùi thì

HTĐ -> QKĐ

HTTD -> QKTD

Will -> Would

Can -> Could

May -> Might

QKĐ -> QKHT

Nếu động từ tường thuật là say(s), tell(s) -> không lùi thì

1. Many doctors say teenagers undergo many physical and mental changes during their puberty

Từ tường thuật ở hiện tại (say) thì không cần lùi thì

2. Sometimes my mother tells me I don’t have to be so tense

Từ tường thuật ở hiện tại (tell) thì không cần lùi thì

3. Peter said that he was looking forward to his grandfather’s gift

4. Peter said that if he passed that test, his father would buy him a new skateboard

5. I told my teacher that I had forgotten to do my homework

6. Jim said that Mr. Brown owned two cars and three houses

7. She told me that she couldn't do it by herself

8. My mother said that she would go on a business trip next week

9. My manager said that someone broke into our office the day before 

10. He told me that I might have trouble if you didn’t do my homework

*Statement:

S + said + (that) + S + V

S + said + to + O + (that) + S + V

S + told + O + (that) + S + V

*Lùi thì:

QKĐ → QKHT

HTĐ → QKĐ

HTHT → QKHT

HTTD → QKTD

QKTD → QKHTTD

HTHTTD → QKHTTD

will → would

can → could

may → might 

must → had to

shall → should

be going to → was/ were going to