英语一轮复习系列(1)2019高中英语语法训练营 刘颖老师

情态动词
must can may will shall dare have to
need could might would should ought to had better
一、共同点
1.+do 2.+not+do 3.一般疑问句,情态动词+主+do
need to do sth(need 不一定是情态动词)
need doing=need to be done
例:The desk need to be rapaired/rapairing(rapair)
二、用法:

1.含义:
(1)must---否定 needn't/don't have to(不必)
mustn't(禁止)
非要,偏要 If you must know,$20 an hour
(2)can
强调做某事的能力
客观存在
(3)would
强调人的意愿(愿意)
物的属性

(4)shall
一,三人称疑问句,征求许可

二,三人称陈述句,承诺/威胁/命令/警告

当主语为法律法规law/rule强调内容(肯定用shall,否定用mustn't)



2.表推测








3.have done




选should(根据基本含义)