1.两种:情态动词和实义动词. 2.你记住情态动词的用法即可: 情态动词+动词原形、否定句在情态动词后加not,一般问句把情态动词提前. 3.实义动词就是指英语中的大多数普通动词,如open,look,see,play,study,live等等. 两个实义动词不能连用,如要连用中间加to、有实义动词的句子变否定句时在主语后加don't,(doesn't,didn't),一般问句把do(does,did)提前. 另外注意:need 当情态动词讲时不能用于肯定句. 如:I need have a rest (x),正确说法是:I need to have a rest.
名词 n. 需要;必要;需求;要求[S][(+of/for)][+to-v] We have no need to be afraid of them. 我们不必怕他们。 必要之物;需求[P1] 贫穷;困窘;危急[U] My neighbors helped me in my time of need. 我的邻居在我困难的日子帮了我忙。...