she is和she has有什么区别啊?答:功能介绍在功能上介乎主动词和助动词之间的一类结构,称为半助动词。常见的半助动词有be about to, be due to, be going to, be likely to, be meant to, be obliged to, be supposed to, be willing to, have to, seem to, be unable to, be unwilling to等。情态助动词 1.情态助动...
助动词的定义答:分类半助动词在功能上介乎主动词和助动词之间的一类结构,称为半助动词。常见的半助动词有be about to, be due to, be going to, be likely to, be meant to, be obliged to, be supposed to, be willing to, have to, seem to, be unable to, be unwilling to等。...情态助动词情态...