cant和doesnt的区别?
cant释义:不可能,不能,是情态动词的否定式
The window can't open. 窗户设计的时候就不能打开,是固定死的。
doesnt是对一般现在时态第三人称行为动词的否定:
The window doesn't open. 窗户打不开。(纯粹陈述客观事实
can't是不可能的意思.
例:I can't move that box because it is so heavy.
don't是助动词.
例:I don't know.
did't是don't的过去式,在一般过去式的句子中改否定句是常用到.
例:He worked out this problem by himself.
否定句是:He didn't work out this problem by himself.
couldn't是can't的过去式.could也有时候表示委婉语气.
例:Could you give me that pen?
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