Viết lại câu : 1 . They need to paint these pieces of funiture . --> These pieces of ... 2 . Have you gone to school late before ? --> Is this ... 3 . She went out for some fresh air . ( In order to ) --> ... 4 . my father doesn't type as fast as he used to ( Used to ) --> ....

 1 . They need to paint these pieces of funiture .
--> These pieces of furniture need painting 
need + V-ing: cấu trúc này mang nghĩa bị động, có nghĩa là cái gì đó cần được làm
2. Have you gone to school late before ?
--> Is this the first time you have gone to school late ? 
Have/ Has + S + V(pp) +...+ before ? 
<=> Is this the first time + S + have/has + V(pp) ? 
3 . She went out for some fresh air . ( In order to )
=> She went out in order to get some fresh air 
in order to mang nghĩa là "để, để mà" : S + V + in order + (not) to V
4. my father doesn't type as fast as he used to ( Used to )
=> My father used to type fast 
used to (từng, đã từng): chỉ một thói quen, một hành động thường xuyên xảy ra trong quá khứ và bây giờ không còn nữa 
S + used to + V-inf