第1个回答 2013-11-29
情态动词:表示说话人的情绪,态度或语气的动词,但不能单独作谓语(I love her.其中“love”即谓语,即动词原形),只能和其他动词原形构成谓语。
用法:情态动词+动词原形 例句:
I can swim.我会游泳.
I can read this sentence in English.我能用英语读这句话.
情态动词数量不多,但用途广泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would).
常见知识点及语法梳理:
1、表示请求和允许用can、could,could语气更委婉.
例句:Could I read your book? 我可以看一下你的书吗?
2、may/might问句的否定回答用mustn't; must问句的否定回答用needn't.
例句:Must I come back before ten? Yes,you must./No,you needn't.
3、need doing(表被动)=need to be done
例句:The flowers need watering/to be watered.这些花需要被浇水了.
4、常考语法之—情态动词表推测
现在—must/may/might do sth—can't/couldn't do sth
过去—must/may/might have done—can't/couldn't have done
5、常考语法之—情态动词+have done
should have done 本该做某事却没做(含有责备之意)(*常考)
shouldn't have done 本不该做某事却做了
could have done 本能做某事却没做
may/might have done 本可以做某事却没做
needn't have done 本不比做某事却做了
希望可以帮到你一点点~
全手敲整理出来的,O(∩_∩)O~望采纳~~~