1.Lan asked me if/ whether I could sing a song.

2.Miss Hoa asked Hung where he had gone the week before.

3.Mr Nam said thathe was taking the IELTS test the next day.

4.My mother said that she hadn't had a computer the year before.

5.The teacher said to me that I had to do my homework myself. 

6.Mary said that she wanted to be a writer when she grew up.

* Giải thích :

−-Câu gián tiếp với "told" : S + told + O ( that ) + S + V lùi thì

−-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 :

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