【AEAS考试网】sure与certain的用法区别
英语是AEAS考试培训中至关重要的课程,2016AEAS考试报名时大家关注较多的就是英语方面。为了更好的提高广大考试的AEAS真题模拟成绩,下面AEAS考试网带领大家一起学习sure与certain的用法区别。
一、2016AEAS考试总结两者在用法上的相同点
两者都可用作表语,表示“一定”或“确信”,有时可互换。互换的场合应注意以下几点用法:
1. 表示说话者的态度或看法
即表示说话者自己的态度或看法,其意为“一定会”“肯定会”。此时主要用法有:
(1) 单独用作表语。如:
One thing was sure [certain]: they'd be late. 有一件事是确定无疑的,他们会迟到。
(2) 后接不定式。如:
He's certain [sure] to win. 他一定会成功。
They're certain [sure] to need help. 他们肯定需要帮助。
If you do this, you are certain [sure] to be found out. 如果你这样做一定会被发现。
2. 表示句子主语的判断或信念
即表示句子主语对某一情况的判断或信念,其意为“相信”“确信”“有把握”等。此时通常用于以下结构:
(1) 后接of [about] sth。如:
He is certain [sure] of success. 他确信会成功。
Are you certain of [about] that? 你对此有把握吗?
(2) 后接 of doing sth。如:
Our team is certain [sure] of winning. 我们队有把握赢。
You can be sure [certain] of his agreeing. 你可以放心他会同意。
比较同义句:
He is certain [sure] of winning.
=He is sure [certain] that he will win. 他自信会赢。
(3) 后接 that / whether / if 从句。如:
I am sure [certain] that he is honest. 我肯定他是诚实的。
I'm sure [certain] that it's not your fault. 我敢肯定这不是你的错。
Are you certain [sure] that this is the right road? 你肯定这条路对吗?
注:当be sure [certain]为肯定式或疑问式时,后接that从句;当be sure [certain]为否定式时,后接whether [if]从句。如:
I'm not sure [certain] whether he still works there. 我不能肯定他是否还在那里工作。
I wasn't sure [certain] whether he would agree. 我不太肯定他是否会同意。
He wasn't sure [certain] whether he would be able to get back in time. 他不能肯定他是否能准时回来。
(4) 2016AEAS考试总结后接其他从句。如:
I'm not sure [certain] where she lives. 我不能肯定她住在哪里。
I'm not certain [sure] who wrote it. 我不太清楚这是谁写的。
二、只能用certain的情形
以下情况通常只用certain,而不用sure:
1. 当句中用了形式主语或形式宾语 it 时。如:
It's certain that he'll come tomorrow. 他明天肯定会来。
I thought it certain that he would be late. 我肯定他会迟到。
It's certain that prices will go up. 价格肯定会上涨。
It's not certain how much it will cost. 这要花多少钱还不确定。
2. 当表示“某一”“某些”时。如:
A certain Mr Green wants to see you. 有个叫格林先生的人想见你。
Certain plants are good to eat but others are not. 有些植物好吃, 而其他一些则不好吃。
三、只能用sure的情形
在 Be sure (not) to do sth.(一定要或不要做某事)这类祈使句中通常不用 certain。如:
Be sure not to forget it. 千万别忘记啦。
Be sure to get there before nine. 务必在九点前到达。
Be sure to turn off the light when leave. 离开时一定要关灯。
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