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CAnnot But Do sth举例子

前者是禁不住做某事,不得不做某事如 i cannot but laugh.我不禁笑了起来.i cannot but admire his courage .我不得不佩服他的勇气.后者是 仅仅、只是 做某事.如 i can but hear.姑妄听之.

cannot but do sth 不得不做某事cannot choose but do sth没有选择只好做某事

cannot不能或不可能 mustnot禁止,不允许 neednot没必要 cannot too You cannot make too more mistakes.

make up one's mind serve sth to do

=have to不得不 When we got to the station,the plane had taken off.We could not help but wait for the next flight.【俊狼猎英】团队为您解答.

I cannot help but do sth 这个对``因为不用to的原因是动词不定式符号``but是个因果词不是动词``顾选后者```

不得不做某事

cannot but + (like/play/eat)括号中的皆为动词原形不能……只能(就)……He cannot eat so much but stop.他不能吃那么多,只能停了.She cannot continue playing tennis but have a rest.她不能继续打网球了,只好休息一下.:)

英语里有两种习惯用法,一种是可作为普通词组做各种变化的,如sb can't but do sth/sb couldn't but do sth而有一类,像三楼所说,不能变,但大多为成句,如Sure as eggs is eggs. (注意,不符合语法,但英美只承认这个写法,不能乱改)

前者表示不得不做某事,相当于have to do 和must do的意思.后者是情不自禁的做某事

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