1.Her school has twenty one classroom 

2.How old are you ?

3.Nam is going to visit his grandparents tonight

4.The last time i played football in 1970

5.We last saw Tom when he move in bristol

6.We might go to the moon for our summer hollyday

7.Unless we use the car all time , we don't make the air dirty

8.If you plant more trees , the air will be frasher

Chúc bạn học tốt

`1`. Her school has twenty-one classrooms.

`=>` Có 21 lớp trong trường cô ấy `=` Trường cô ấy có 21 lớp

`2`. How old are you?

`=>` How old + be + S `->` Hỏi về tuổi

`3`. Nam is going to visit his grandparents tonight.

`=>` Tương lai gần: S + is/am/are + going to + Vinf

`4`. The last time I played football was in 1970.

`=>` S + have/has + not + Vpp + since + mốc thời gian `=` The last time + S + V2/ed + was + in + mốc thời gian

`5`. We last saw Tom when he moved to Bristol.

`=>` S + have/has + Vpp + since + S2 + V2/ed `=` S + last + V2/ed + when + S2 + V2/ed

`6`. We might go to the moon for our summer holiday in 2050.

`=>` might + Vinf

`7`. Unless we use the car all time, we won't make the air dirty.

`=>` unless = if ... not

`8`. If you plant more trees, the air will be fresher.

`=>` If 1: if + S1 + Vs/es, S2 + will + Vinf