#wheijx.

`7.` So as to reduce air pollution , he planted more trees last week.

`-` So as to V-inf + ... , S + V : để làm gì

`8.` That smartphone's memory is not so large , however , Mrs.Smith want to buy it.

`-` S + V + ... , however , S + V : tuy nhiên

`9.` My sister asked me if I wanted to spend my holiday in an ethnic village in Sapa.

`-` Câu tường thuật : S + asked + O + if/whether + S + V ( lùi thì )

`-` Biến đổi thì : HTD `->` QKD

`-` Biến đổi ĐT nhân xưng : you `->` I

`10.` Isabella said that her sister was a singer and she earned a lot of money.

`-` Câu tường thuật : S + said + (that) + S + V (lùi thì)

`-` Biến đổi thì : HTD `->` QKD

`11.` B-Bot completed the task faster than Robbob.

`-` So sánh hơn : S + V + more + adv + ... + than + S2

`-` TH đặc biệt : fast chuyển sang trạng từ ở dạng ss hơn là faster.

`12.` People can't live on Mars because there is no air.

`-` can't `=` tobe impossible : không thể / bất khả thi