Cấu trúc câu `38;39;40`

`->` S + have/has + not + Vpp + for/since + time

`=` S + last + V2/ed + time + ago

`=` The last time + S + V2/ed + was + time + ago

`=`  It is + time + since + S (last) + V2/ed

`38.`

`->` I last saw my uncle two years ago.

`->` I haven't seen my uncle for two years.

`39.` The last time he smoke was a month ago.

`40.`  I haven't gone swimming since I was in France.

`41.` Walking isn't as fast as cycling.

So sanh bằng:

`->` S + to be + as + adj/adv + as + Noun/ Pronoun

`42.`  Health is more important than money.

So sánh hơn với tính/trạng từ dài:

`->` S + to be + more + adj/adv + than + Noun/ Pronoun

`43.` Today's exam was shorter than yesterday's exam.

So sánh hơn với tính/trạng từ ngắn:

`->` S + to be + adj/adv + er + than + Noun/ Pronoun

`44.` It takes me twenty minutes to walk to school every morning.

`->` It take(s)/took (sb) + time + to do something 

`=` S + spend(s)/spent + time/ money + V-ing