Question

sure和certain有什么区别？

Answer 1

sure 和certain 有什么区别
答案：
一、 先弄明白它们意思与词性：
sure
adj.对....有把握, 确信某事, 稳当的, 可靠的
adv.的确, 当然
certain
adj.确定的, 某一个, 无疑的, 必然的, 可靠的
pron.某几个, 某些
二、 用法：
（一）Sure与certain是近义词，均作“一定的，确信的”等解。两者用法相似，多数情况下可换用，但有时不能换用。其用法区别大致如下： 一、 两者可换用的情况：
1． 跟不定式，可用人或物作主语。例如： It is sure/certain to rain. He is sure/certain to come.
You’re sure/certain to be happy with them.
2．跟连接代/副词引起的不定式，常用人作主语。例如： I’m not sure/certain what to do.
He was not sure/certain when to start.
3．跟of或about引起的短语。sure后可跟of doing sth. 常用人作主语。例如： I’m not sure/certain of that. Are you sure/certain about it? I’m sure of his coming. He’s sure of winning.
注：sure to do sth.与sure of doing sth.的区别：前者表示说话者认为“主语一定…”；后者表示“主语自认为一定…”。例如：
He is sure to succeed. (说话者认为“他”一定会成功。 He is sure of succeeding. (“他”自己认为一定成功) 4．跟that引起的从句，常用人作主语。例如： I’m sure/certain that he’ll come.
I was sure/certain (that) he had seen me.
I’m quite sure/certain I left the book on the table.