didn't can't won't mostn't needn't weren't doesn't 的用法和意思
问题描述：
didn't can't won't mostn't needn't weren't doesn't 的用法和意思
答
didn't助动词do/does的过去式的否定式can't 情态动词can的否定式,表示“不能做……”,又是也表猜测“不可能”won't will过去式的否定式,表示“不去做……”needn't need的否定式,表示“不需要做……”weren't are/is...mustn't呢？mustn't must 的否定式，后加动词原形，表示“不可能……”