反身代词 myself herself himself themselves ourselves yourself
及物动词：这类动词动词后面可以直接接宾语,表示动作的承受者.如beat me(打我).
不及物动词：这类动词后面如果接宾语的话,需要在动词和宾语间加上相应的介词.如 listen to me(听着).
情态动词：这类动词后面可以直接接动词原形,表示对情况的推测或对事物的态度及语气.主要包括would,could,can,may,might,must,should.另外,need,dare也可以作情态动词.
（1）would,can/could,may,might,一般表示对情况的可能性推断.
（2）must +have 一般用于对过去某种情况的肯定推断.注意,mustn't 不能用于推断,只表示“不准”.
（3）should +have /have not+动词过去分词,表示：本该做而没有做/本不该做而做了.
（4）need 和dare 一般在否定情况下用作情态动词.如you needn't do sth.
虚拟语气：主要包括对过去,现在和将来情况的假设.
（1）与过去事实相反,主句用would +过去完成时,if从句用过去时
if i was given more time,i would have finished that work.
(2 )于现在事实相反,主句用would +动词原形,if从句用过去时.
if i were you,i would join that club.
(3)与将来事实相反,主句用would +动词原形,if 从句用should+ 动词原形.
if i should die tomorrow,i would cherish every minute today.
镇定：keep calm,be calm.
