besureabout的用法及例句
be sure about sth.
It is impossible to be sure about the value of land.
土地的价值是无法确定的.
扩展资料
be sure of 与 be sure about 的区别:be about to
be sure of 确信
例句:She looked over her shoulder to be sure of her footing.她扭头看了看后面以确认自已是否站稳了.
be sure about 对.很有把握
例句:You can be sure about their interest in it.你可以肯定他们对引很感兴趣.
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