sure的用法be sure of doing和 be sure to do有什么区别呀?

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sure的用法be sure of doing和 be sure to do有什么区别呀?
sure的用法
be sure of doing和 be sure to do有什么区别呀?

sure的用法be sure of doing和 be sure to do有什么区别呀?
He is sure of getting the first place.
他自己有把握拿第一.
He is sure to get the first place.
他肯定会拿第一的.(别人对他的看法)