1.have的用法：
have作為行為動詞時,有自己的意思,表示“有”.例如,I have a pen.否定句就是I don't have a pen.多借用助動詞do(有時態(tài)變化)+not have形式
have 做為助動詞時,用于完成時態(tài),表示已經(jīng)的狀態(tài).例如,I have done my homework.否定句是：I haven't done my homework.直接在have這個助動詞上加not,haven't/hasn't + 動詞完成式
2.need的用法
need作為情態(tài)動詞時：need (無任何形態(tài)變化) + do sth,否定式needn't + do sth
need作為行為動詞時：need (有時態(tài)變化needs/needed) + to do sth,否定式需用助動詞do來幫忙,don't/didn't/doesn't need to do sth
可以溝通哦need做行為動詞？應(yīng)該說是實義動詞