•"What's wrong with him?" "I'm not really sure."“他怎么啦？”“我不太清楚。”

•I'm sure (that) I left my keys on the table.我确定我把锁匙放在桌上了。

•I feel absolutely sure (that) you've made the right decision.我完全确信你的决定是正确的。

•It now seems sure (that) the election will result in another victory for the government.现在看来，这次选举无疑又会以政府的胜利而告终。

•Simon isn't sure wh ether/if he'll be able to come to the party or not.西蒙不太确定他能否参加这次聚会。

•Is there anything you're not sure of/about ?还有不清楚的地方吗?

•There is only one sure way (= one way that can be trusted) of finding out the truth.只有一种方法肯定能弄清真相。

•Henry has only been working for us for a short while, and we're not really sure about him yet.亨利才为我们工作了很短一段时间，我们对他还不是很了解。

•You can always be sure of Kay.你完全可以信任凯。

•I know for sure that I won't be able to go to the party.我非常确定自己不能参加这个晚会。

•One thing's for sure - once the baby's born, your lives will never be the same again.有一点是肯定的——一旦孩子出生，生活就完全不一样了。

•She's become much more sure of herself since she got a job.她找到工作以后自信多了。

•He said that he wasn't completely sure of his facts.他说他还不能完全肯定自己所掌握的情况是否属实。

•We arrived early, to be sure of getting a good seat.我们很早就到了，以确保有个好座位。

•A majority of Congress members wanted to put off an election until they could be sure of winning it.大多数国会议员都想把选举延后到他们有把握稳操胜券的时候。

•She's sure to win.她肯定会赢。

•I want to go somewhere where we're sure to have good weather.我想去一个肯定有好天气的地方。

•Make sure you lock the door behind you when you go out.出门的时候一定要锁好门。

•I don't think he has a very sure understanding of the situation.我想他还不是十分了解情况。

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•One day he'll realize that I was right, as sure as eggs is eggs.毫无疑问，他总有一天会了解我是对的。

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•There better be another way in - I'm sure as hell not climbing up all those steps.最好还有别的路可以进去——我是肯定不会爬那么多台阶的。

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•He said he'd left the book on the desk, and sure enough, here it was.他说他把书放在桌上了，果然，书就在那里。

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•"Could you give me a lift home tonight?" "Sure thing!"“今晚我能搭你的车回家吗？”“没问题！”

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•This is not his best book, to be sure, but it is still worth reading.这肯定不是他写得最好的书，但还是值得一读。

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•"Do you want to come swimming with us?" "Sure."“你想来跟我们一起游泳吗？”“当然。”

•mainly US "Will you help me with this?" "Sure I will."“能帮我拿一下这个吗？”“当然可以。”

•US I sure am hungry.我当然饿了。