he doesn't need to come if he feel sick
问题描述：
he doesn't need to come if he feel sick
为什么是doesn't need to come 而不是needn't to come
讲清为什么或语法知识
重点说明为什么doesn't need to come
答
need既可以作实义动词,也可以做情态动词.当他做实义动词时,用need to do sth,当做情态动词时,其后直接加动词原形,你这个句子还可以用needn't come,而不是needn't to come.若不懂还可以问我,我一直在线.