`1` I used to swim every Thursday when I was at school.

`-` S + used to + V_inf

`2` It is about 300km from Ho Chi Minh City to Phu Quoc Island.

`->` It is + about + khoảng cách + from + ... + to + ... ? 

`3` How about cycling to the town at the weekend?

`⇒` Why don't we + V + O?

`=` How about + V_ing + O? : Hay là làm việc gì đó

`4` It is about 2 kilometers from my house to the nearest bookstore.

`->` It is + about + khoảng cách + from + ... + to + ... ? 

`5` The hotel is near the airport.

`6` How far is it from Ha Noi to Vung Tau?

`->` How far it is from ... to ...? : Từ ... đến ... bao xa?

`7` Mr. Tam used to go to work by car some years ago.

`-` S + used to + V_inf

`8` Did your father use to travel to work by car?

`->` Did + S + used to + V_inf?

`9` Can you travel to Sa Pa by air?

`->` Can + S + V?

`10`  If you aren't careful, you will fall off your bicycle.

`->` Câu điều kiện loại `1` : If + S + V_s / V_es, S + will / won't + V1

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