知识点1:sure与certain的用法与区别
[1]certain单词记忆法◆记忆方法一：分析：谐音 ―舌疼‖ 记忆方法：自己的舌疼可以确实无疑的感觉到 初中二年级单词（4） mind 介意◆记忆方法二：联想方式：ce（车上）；r（花）；tain（台南）记忆方法：某些车上的花是来自台南。
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：
[2]whether,that,相关知识点that与whether (if)引导名词性从句的区别that与whether (if)引导名词性从句的区别两者均可引导宾语从句，也可引导语从句和表语从句(if 通常不行)，但两者含义不同，whether (if) 表示“是否”，that 却不表示任何含义。在它们所引出的从句中，that 表示一种肯定、明确的概念，而 whether (if) 则表示一种不肯定、不明确的概念。比
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。
[3]fault单词记忆法◆记忆方法一：谐音：罚他 谁有过失就罚他！◆记忆方法二：词根词缀记忆法：fault n 过失，缺点（fault=fal错）,fall,fail,fault=err,deceive,表示“犯错误，欺骗”
Are you certain [sure] that this is the right road? 你肯定这条路对吗?
[4]this,that,相关知识点知识点1:指示代词This与That的前指与后指关于指示代词this与that的前指与后指，请注意以下两点：1. 如果是前指（即回指前文提到的事情），可用that或this。如：She married Jim, and this [that] surprised me. 她嫁给了吉姆，这使我感到很吃惊。John had a bad cold. That [This] was w
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) 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：
[5]宾语,主语,相关知识点知识点1:“动词+间接宾语+直接宾语”改为被动时,可以用间接宾语做被动句的主语。如：His teacher gave him a dictionary.—He was given a dictionary by his teacher.(老师给他一本字典—他得到老师一本字典)也可以用直接宾语做被动句的主语,但是需用to或者for引出原句的间接宾语。如:His teacher g
It's certain that he'll come tomorrow. 他明天肯定会来。
[6]tomorrow单词记忆法◆记忆方法一：联想方式：tom汤姆；o嘴巴；rr人人；ow欧文汤姆张开嘴巴说明天人人都可以成为欧文◆记忆方法二：分析：to --- 去 morrow --- “猫肉”的谐音； 记忆方法：明天我们就去吃猫肉。◆记忆方法三：联想方式：tom汤姆；o嘴巴；rr人人；ow欧文记忆方法：汤姆张开嘴巴说明天人人都可以成为欧文
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。
[7]there be,there,相关知识点There be句型及there引导的句子[1]there单词记忆法◆记忆方法一：联想方式：t-天；here-很热那儿天气很热◆记忆方法二：联想方式：t-天；here-很热记忆方法：那儿天气很热查看详情>>There may (might)still be some vacant seats．或许还有空位子。There should(ought to)be a comma th
certain相关单词意思与记忆法：
certain单词意思解释释义：
a. 确定的, 某一个的, 必然的【法】 确凿的, 无疑的, 可靠的相关词组: be certain of It is certain that I am certain that... I am not certain whether... to a certain extent for certain
certain单词记忆法：
◆记忆方法一：
分析：谐音 ―舌疼‖
记忆方法：自己的舌疼可以确实无疑的感觉到
初中二年级单词（4）
mind 介意
◆记忆方法二：
联想方式：ce（车上）；r（花）；tain（台南）
记忆方法：某些车上的花是来自台南。
sure相关单词意思与记忆法：
sure单词意思解释释义：
a. 确信, 必然的, 必定的ad. 当然, 确实地, 无疑地相关词组: for sure feel sure that make sure make sure of sth make sure that sure enough to be sure as sure as a gun as sure as eggs is eggs as sure as death as sure as nails as sure as fate as sure as one lives be sure of oneself feel sure of
sure单词记忆法：
◆记忆方法一：
联想方式：su:宿 re:阿姨
记忆方法：宿管阿姨肯定是女的
certain单词相关例句：A certain amount of care or pain or trouble is necessary for every man at all times .A ship without a ballast is unstable and will not go straight.——Arthur Schopenhauer.Geman philosopher一定的忧愁、痛苦或烦恼，对每个人都是时时必需的。一艘船如果没有压舱物，便不会稳定，不能朝着目的地一直前进。德国哲学家 叔本华 A
After a certain number of years.our faces become our biographies. 经过若干年之后,我们的面貌就成了我们的传记.
The way to win an atomic war is to make certain it never starts.——Bradley Omar American General 赢得核战争的方法是确保它永远不会发生。美国上将 奥马尔， B.
This actor is certain that he will win the award.
这个演员很确信可以获奖。
Homosexual marriage is legal in certain countries.
同性恋婚姻在一些国家是合法的。
Certainly a man can only be cosmopolitan up to a certain point.
毫不疑问，一个人在一定程度上必须八面玲珑才成。
Because there are people who will follow our lead and buy a certain sneaker or cereal because we use it.
因为人们会跟我们学，会因为我们穿某种运动鞋或吃某种谷类食品而去买这些东西。
There was a certain photograph about which you had a hallucination .
你当时有一种幻觉，以为看到了一张照片。
We are asking a network or system to attenuate certain frequencies.
我们正在要求一个网络或系统去压制某些频率。
Coral needs certain conditions in order to live.
珊瑚需要一定的环境才能存活。
sure单词相关例句：Talk of the devil, and he is sure to appear. 说鬼鬼到。
A clear conscience is a sure card. 光明磊落，胜券在握。
If you would build for your happiness a sure foundation, let the stone for the corner be a good reputation. 若想为快乐奠立可靠的基础，美好的名声便是奠基的石头。
He who follows two hares is sure to catch neither. 追逐两只兔，两头都落空。
He who fears being conquered is sure of defeat.——Bonaparte Napoleon, French enperor 怕吃败仗的人必然要打败仗。法国皇帝 拿破仑.B.
At Easter let your clothes be new,or else be sure you will it rue. 复活节不穿新衣裳,日后不免要懊丧.
Sure bind, sure find. 捆得好，逃不了。
Make sure not to touch the acid--it will burn.
确保不要去碰酸，它会灼伤你。
Make sure to bring your sunglasses today. It's really sunny.
今天记得一定要戴上太阳镜，外面太阳很大。
Make sure your object is in focus before taking the photo.
拍照前要确保你的物体对焦。
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