make sure to do和be sure to do有什么区别?

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makesuretodo和besuretodo有什么区别?makesuretodo和besuretodo有什么区别?makesuretodo和besuretodo有什么区别?makesure一般用在句

make sure to do和be sure to do有什么区别?
make sure to do和be sure to do有什么区别?

make sure to do和be sure to do有什么区别?
make sure 一般用在句首,前面美有主语,表确定,证实;而be sure 前有主语,一般为sb.be sure to do sth./of sth./that