Question

怎么分辨need在一个句子中是情态动词还是实意动词,如I need _______ （improve）my Englis

Answer 1

I need ___to____ （improve）my English.

当need用作情态动词时,只能是在否定句中.即只有needn't的形式.或者用于疑问句中,把need提到句首,如 You needn't come here tomorrow.///Need i do it at once?

而实意动词need 则可用于肯定句,否定句等等.如

i don't need to do it now

i need to do it now