`20.`The stuntman advised the audience not to try that at home.

`21.`She said that she had been very tired.

`22.`She told Ben to be careful.

`23.`She said that she would give herself a drink.

`24.`He wondered why she hadn’t phoned him.

`25.`He said that he could not drive them home.

`26.`She asked Peter if he preferred tea or coffee.

`27.`She asked me where I had spent my holidays the previous year.

* Giải thích :

`-`Câu mệnh lệnh và câu yêu cầu trong lời nói gián tiếp : S + told/asked + O + to V bare...

`-`Câu gián tiếp với "said" : S + said ( that ) + S + V lùi thì...

`-`Khuyên ai nên/ không nên làm gì : S + advised + O + (not) + to V bare...

`-`Câu hỏi Yes/No : S + asked +(O)/wanted to know/ wondered + if/whether + S + V lùi thì

`-`Câu hỏi có từ để hỏi Wh-Questions : S + asked/ wondered/ wanted to know + Wh-Questions + S + V lùi thì

- Lùi thì :

Hiện tại đơn `⇒`Quá khứ đơn

Quá khứ đơn `⇒`Quá khứ hoàn thành tiếp diễn

Quá khứ hoàn thành`⇒`Quá khứ hoàn thành

Tương lai đơn `⇒`Tương lai trong quá khứ

am/is/are + going to V `⇒`was/ were going to V

will `⇒`would

Shall/ Can / May `⇒`Should / Could/ Might

Should / Could/ Might/ Would/ Must `⇒`Giữ nguyên

- Đổi đại từ nhân xưng, tính từ sở hữu và đại từ sở hữu

I `⇒`She/ he

We `⇒`They

You `⇒`I, he, she/ they

Us `⇒`Them

Our `⇒`Their

Myself `⇒`Himself / herself

Yourself `⇒`Himself / herself / myself

Ourselves `⇒`Themselves

My `⇒`His/ Her

Me `⇒`Him/ Her

Your `⇒`His, her, my / Their

Our `⇒`Their

Mine `⇒`His/ hers

Yours `⇒`His, her, mine/ Theirs

Us `⇒`Them

Our `⇒`Their

- Thời gian, nơi chốn :

Here `⇒`There

Now `⇒`Then

Today `⇒`That day

Yesterday `⇒`The previous day, the day before

Tomorrow `⇒`The following day, the next day

Ago `⇒`Before

Last week `⇒`The previous week, the week before

Next week `⇒`The following week, the next week

This `⇒`That

These `⇒`Those