三种时态：一般现在、现在进行、一般过去掌握现在分词、过去式

　　祈使句:肯定动词原形开头否定：前面加don't

　　非谓语动词：wanttodowouldliketododecidetodohopetodoasksb.todotellsb.todowantsb.todowouldlikesb.todowouldlikesb.todoit'stimetodo

　　practicedoingenjoydoingspend...(in)doingwhataboutdoingThanksfordoingwatch/see/hear/findsb.do/doinghave(fun)doing

　　helpsbdo/todowhynotdohadbetterdomake/letsb.do

　　情态动词can表示能力；允许haveto必须,不得不

　　介词用法（Unit2）acrossfromnexttoinfrontofbehindontheleft/rightofbetwwn...and...