`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