2018年军校招生备考英语have 的否定形式

 　have 的否定形式：

　　① 当表示"有"的意思时，可以采用以下三种形式：have+not;do not+ have; have+ no+ n. 如：I have not enough food to eat.= I do not have enough food to eat. =I have no enough food to eat.

　　② 当have为助动词时，用"have+ not"结构。如：I have not been toShanghai。

　　③ 当have既不表示"有"，也不作助动词用时，用"do not+ have"结构。I didn't have breakfast this morning.