need 既可以是情态动词,也可以是行为动词 need 当情态动词后跟动词原形 need 作行为动词用法是 sb needs to do sth sth needs doing = sth needs to be done 再问: need mending 等于 need to be mended? i need do homework 还是 i need doing homework? 再答: 到底用那种形式,要看need 和主语的关系 , I 和do 的关系 是主谓关 系, 故应该是 I need to do my homework, 如果是鞋需要修理, the shoes need mending /the shoes need to be mended . shoes 和need 存在动宾关系。 再问: 什么是动宾关系? 再答: 就是鞋是修理的宾语 mend the shoes ,这就是动宾关系。