简单句I found that the boys were talking in class
I　　found　　the　　boys　　talking　　in　　class．
May I leave for home now?否定回答　　　　　　No,　　you　　can＇t．／mustn＇t
Must I take off the shoes?否定回答　　　　No,　　you　　needn＇t
We got along well with our friends last year?画线well 提问　　How　　did　　you　　get　　along　　with　　your　　friends　　last　　year?
Lucy happened (see)the boy yesterday　　【to　　see】
In 20years what the world (is)like?【will　　be】
I'm thinking about how (finish) the work in time?【to　 finish】
I don't think he (fly) to the USA　 【will　 fly】