`Đáp` `án:`

1. The scientist said that they would live much longer in the future.

2. Our teacher said that their school was going to have a new laboratory there.

3. My mum said that they were developing technology to monitor students better.

4. She said that she went to the supermarket every day.

5. He said that he didn't know what had happened. 

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Câu tường thuật - dạng câu kể 

S + said to / told + O + (that) + S + V (lùi thì)

S + said + (that) + S + V (lùi thì)

Câu tường thuật - dạng Yes/No-questions 

S + asked / wanted to know / wondered + (O) +if/whether + S+ V (lùi thì)

Câu tường thuật - dạng Wh-questions 

S + asked / wanted to know / wondered + (O) +WH + S+ V (lùi thì)

Câu tường thuật - dạng câu yêu cầu, mệnh lệnh

S + told / asked + O + to V / not to V 

S + say(s) / tell(s) + that + S+ V (k lùi thì)

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Hiện tại đơn → Quá khứ đơn 

will → would 

Hiện tại hoàn thành → Quá khứ hoàn thành 

Quá khứ đơn → Quá khứ hoàn thành 

can→ could

Hiện tại tiếp diễn → Quá khứ tiếp diễn

Quá khứ tiếp diễn → Quá khứ hoàn thành tiếp diễn

Tương lai gần → was/were + going to + V1 

must → had to 

If 1 → If 2

If 2,3 → không lùi

should → should 

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tonight → that night 

today → that day 

here → there 

now → then 

last ... → the ... before / the previous ... 

yesterday →the day before / the previous day 

tomorrow → the next day / the following day 

next ...→ the next ..../ the following ....

this → that 

ago → before

these → those