`36` I haven't seen Nam for 3 years ( S + hasn't / haven't + Vpp + for + time/ since + time 

`37`  Carol told Tom not to make so much noise  ( S + told + O +not + to - V : nói ai ko làm gì ). 

`38` It's very important to keep the environment clean ( It's important to - V : quan trọng để làn gì ) 

`39`  Mrs Hoa suggested you should turn off the lights before going out ( S + suggeted + O - should + V - O : đề nghị ai nên làm gì )  

`40`  How about planting some trees around your house to get more fresh air ? ( How about+ Ving ? = Why don't + S + C ? )

@ Dorris