REWRITE
1.He hasn't smoked cigarettes for a month
=>The last time....................
2.There are over two hundred stamps in Mr Buong's collection
=>Mr.Buong's collection................
3.I spend twenty minutes walking to school every morning.
=>It takes................
4.I find losing weight very difficult.
=>It's..............................
help mee,ghi giải thích thì càng tốt nhee
1 ........ he smoked was a month ago
-S+hasn't/haven't+PII+for+khoảng thời gian
=S+last+V(ed/bất quy tắc)+was+khoảng thời gian
2 ............ has over two hundred stamps
3 ........ me twenty minutes to walk to school every morning
-S+spend+thời gian+V-ing+........
= It+take+O+thời gian+to V+..........
4 .........very difficult for me to lose weight
- S+find+V-ing+adj
= It+"be"+adj+for O+to V