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2025年12月六级语法：sure与certain的用法与分手

　一、两者在用法上的调换点

两者齐可用作表语，暗意“一定”或“确信”，只怕可互换。互换的场面应注目以下几点用法：

1. 暗意语言者的气派或办法

即暗意语言者我方的气派或办法，其意为“一定会”“信赖会”。此时主要用法有：

(1) 单独用作表语。如：

One thing was sure [certain]: they'd be late. 有一件事是细则无疑的，他们会迟到。

(2) 后接不定式。如：

He's certain [sure] to win. 他一定会得胜。

They're certain [sure] to need help. 他们信赖需要匡助。

If you do this, you are certain [sure] to be found out. 要是你这么作念一定会被发现。

2. 暗意句子主语的判断或信念

即暗意句子主语对某一情况的判断或信念，其意为“信赖”“确信”“有主理”等。此往当年用于以下结构：

(1) 后接of [about] sth。如：

He is certain [sure] of success. 他确信会得胜。

Are you certain of [about] that? 你对此有主理吗?

(2) 后接 of doing sth。如：

Our team is certain [sure] of winning. 咱们队有主理赢。

You can be sure [certain] of his agreeing. 你不错释怀他会承诺。

相比同义句：

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. 我信赖他是敦厚的。

I'm sure [certain] that it's not your fault. 我敢信赖这不是你的错。

Are you certain [sure] that this is the right road? 你信赖这条路对吗?

注：当be sure [certain]为信赖式或疑问式时，后接that从句;当be sure [certain]为辩白式时，后接whether [if]从句。如：

I'm not sure [certain] whether he still works there. 我不可信赖他是否还在那里使命。

I wasn't sure [certain] whether he would agree. 我不太信赖他是否会承诺。

He wasn't sure [certain] whether he would be able to get back in time. 他不可信赖他是否能准时追思。

(4) 后接其他从句。如：

I'm not sure [certain] where she lives. 我不可信赖她住在那处。

I'm not certain [sure] who wrote it. 我不太明晰这是谁写的。

二、只可用certain的情形

以下情况频频只用certain，而无用sure：

1. 当句顶用了口头主语或口头宾语 it 时。如：

It's certain that he'll come tomorrow. 他来日信赖会来。

I thought it certain that he would be late. 我信赖他会迟到。

It's certain that prices will go up. 价钱信赖会飞腾。

It's not certain how much it will cost. 这要花几许钱还不细则。

2. 当暗意“某一”“某些”时。如：

A certain Mr Green wants to see you. 有个叫格林先生的东谈主思见你。

Certain plants are good to eat but others are not. 有些植物可口, 而其他一些则不可口。

三、只可用sure的情形

在 Be sure (not) to do sth.(一定要或不要作念某事)这类祈使句中频频无用 certain。如：

Be sure not to forget it. 千万别健忘啦。

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。

四、两者在习语中的用法

1. 用于 for certain / for sure, 意为“信赖地”“真正地”等，两者可互换。如：

I can't say for certain [sure] when he will come. 我不敢信赖地说他什么本事来。

No one knows for sure [certain] what happened to her. 莫得东谈主真正地知谈她出了什么事。

2. 用于 make certain / make sure，意为“弄明晰”“弄得有主理”，两者可互换。如：

They made certain [sure] (that) they weren't late. 他们有主理不迟到。

I think there's a train at 10:40, but you'd better make certain [sure] of it. 我思10:40有趟火车万博manbext网站登录，但你最佳去核实一下。