certain和sure的異同點(diǎn)

1、sure與certain的用法區(qū)別一、兩者在用法上的相同點(diǎn)兩者都可用作表語(yǔ)，表示“一定”或“確信”，有時(shí)可互換?；Q的場(chǎng)合應(yīng)注意以下幾點(diǎn)用法：1. 表示說(shuō)話者的態(tài)度或看法即表示說(shuō)話者自己的態(tài)度或看法，其意為“一定會(huì)”“肯定會(huì)”。此時(shí)主要用法有：(1) 單獨(dú)用作表語(yǔ)。如：One thing was sure certain: theyd be late. 有一件事是確定無(wú)疑的，他們會(huì)遲到。(2) 后接不定式。如：Hes certain sure to win. 他一定會(huì)成功。Theyre certain sure to need help. 他們肯定需要幫助。If you do this, yo

2、u are certain sure to be found out. 如果你這樣做一定會(huì)被發(fā)現(xiàn)。2. 表示句子主語(yǔ)的判斷或信念即表示句子主語(yǔ)對(duì)某一情況的判斷或信念，其意為“相信”“確信”“有把握”等。此時(shí)通常用于以下結(jié)構(gòu)：(1) 后接of about sth。如：He is certain sure of success. 他確信會(huì)成功。Are you certain of about that? 你對(duì)此有把握嗎?(2) 后接 of doing sth。如：Our team is certain sure of winning. 我們隊(duì)有把握贏。You can be sure certain

3、 of his agreeing. 你可以放心他會(huì)同意。比較同義句：He is certain sure of winning.=He is sure certain that he will win. 他自信會(huì)贏。(3) 后接 that / whether / if 從句。如：I am sure certain that he is honest. 我肯定他是誠(chéng)實(shí)的。Im sure certain that its not your fault. 我敢肯定這不是你的錯(cuò)。Are you certain sure that this is the right road? 你肯定這條路對(duì)嗎?注：當(dāng)

4、be sure certain為肯定式或疑問(wèn)式時(shí)，后接that從句；當(dāng)be sure certain為否定式時(shí)，后接whether if從句。如：Im not sure certain whether he still works there. 我不能肯定他是否還在那里工作。I wasnt sure certain whether he would agree. 我不太肯定他是否會(huì)同意。He wasnt sure certain whether he would be able to get back in time. 他不能肯定他是否能準(zhǔn)時(shí)回來(lái)。(4) 后接其他從句。如：Im not sur

5、e certain where she lives. 我不能肯定她住在哪里。Im not certain sure who wrote it. 我不太清楚這是誰(shuí)寫(xiě)的。二、只能用certain的情形以下情況通常只用certain，而不用sure：1. 當(dāng)句中用了形式主語(yǔ)或形式賓語(yǔ) it 時(shí)。如：Its certain that hell come tomorrow. 他明天肯定會(huì)來(lái)。I thought it certain that he would be late. 我肯定他會(huì)遲到。Its certain that prices will go up. 價(jià)格肯定會(huì)上漲。Its not cert

6、ain how much it will cost. 這要花多少錢(qián)還不確定。2. 當(dāng)表示“某一”“某些”時(shí)。如A certain Mr Green wants to see you. 有個(gè)叫格林先生的人想見(jiàn)你。Certain plants are good to eat but others are not. 有些植物好吃, 而其他一些則不好吃。三、只能用sure的情形在 Be sure (not) to do sth.(一定要或不要做某事)這類(lèi)祈使句中通常不用 certain。如：Be sure not to forget it. 千萬(wàn)別忘記啦。Be sure to get there be

7、fore nine. 務(wù)必在九點(diǎn)前到達(dá)。Be sure to turn off the light when leave. 離開(kāi)時(shí)一定要關(guān)燈。四、兩者在習(xí)語(yǔ)中的用法1. 用于 for certain / for sure, 意為“肯定地”“確切地”等，兩者可互換。如：I cant say for certain sure when he will come. 我不敢肯定地說(shuō)他什么時(shí)候來(lái)。No one knows for sure certain what happened to her. 沒(méi)有人確切地知道她出了什么事。2. 用于 make certain / make sure，意為“弄清楚”

8、“弄得有把握”，兩者可互換。如：They made certain sure (that) they werent late. 他們有把握不遲到。I think theres a train at 10:40, but youd better make certain sure of it. 我想10:40有趟火車(chē)，但你最好去核實(shí)一下。Sure與Certain用法一覽英語(yǔ)中的sure和certain是近義形容詞，均有“肯定的；確信的；有把握的”的意思，它們的用法也大體相似，許多情況下可以通用，但它們之間也有一些差別，現(xiàn)歸納如下：一、相同點(diǎn)1. 兩者都能用于“be sure/certain +

9、about /of短語(yǔ)”句型中，表示“對(duì)（某事）有把握”。主語(yǔ)必須是人，about/of之后多跟名詞、代詞。如：I am sure/certain of his returning. 我確信他會(huì)回來(lái)。He is quite sure/certain of /about it. 他對(duì)這事很有把握。2. 兩者都能用于be sure/certain to do sth句型中，表示“一定會(huì)做某事”，主語(yǔ)可以是人，也可以是物。如：Spring is sure/certain to follow winter. 冬天過(guò)后一定是春天。They are sure/certain to come. 他們一定會(huì)來(lái)

10、的。3. 兩者都能用于“be sure/certain +從句”句型中，表示“確信”，主語(yǔ)只能是人，而不能是物。如：Tom is sure/certain that I put the key on the table. 湯姆確信我把鑰匙放在桌子上了。We are sure/certain that the book will be of great help to us.我們相信這本書(shū)對(duì)我們會(huì)有很大幫助。4. 兩者都能用于“make sure/certain +從句”結(jié)構(gòu)中，表示“確定；弄清楚”，主語(yǔ)只能是人。如：You must make sure/certain when the bus

11、 will leave. 你必須弄清汽車(chē)何時(shí)出發(fā)。5. “I m not sure”與“I m not certain”意思相同。如：I m not sure/certain where he is. 我不能確定他在哪兒。I m not sure/certain how to do it. 我不能確定如何做這件事。二、不同點(diǎn)1. “I m sure”與“I m certain”均可譯為“我深信（確）信”，但兩者的含義卻不同。前者表示一種主觀上的判斷或感覺(jué)，事實(shí)并不一定如此。后者強(qiáng)調(diào)的則是客觀事實(shí)，意為主語(yǔ)已經(jīng)知道后面的內(nèi)容是既定的事實(shí)。試比較下面一組句子：I m sure he didn t

12、steal it. He isn t that kind of person. 我確信他沒(méi)偷，他不是那種人。I m certain he didn t break the cup. I broke it myself. 我敢肯定他沒(méi)有打碎那個(gè)茶杯，（因?yàn)椋┠莻€(gè)茶杯是我打碎的。2. 如果it作為形式主語(yǔ)代替從句時(shí)，則其后的表語(yǔ)用certain，而不能用sure。如：It isn t certain whether he will give us a report next Monday. 下星期一他是否來(lái)為我們作報(bào)告還不能確定。3. 兩者在作定語(yǔ)時(shí)含義不同：sure意為“可靠的；無(wú)誤的”；而certain若修飾可數(shù)名詞，意為“某一；某些；某種；一些”，若修飾抽象名詞，表示程度，意為“有點(diǎn)；有些”。如：The letter was sent by a sure hand. 信已由一位可靠的人寄出了。He made a sure answer. 他回答得準(zhǔn)確無(wú)誤。A certain person called on me yesterday. 昨天有個(gè)人來(lái)找過(guò)我。4. 在祈使句中常用sure，不宜用certain。如：Be sure and remember what I told you. 千萬(wàn)要記住我對(duì)你講的話。Be sure to w