conj.(连词)

1. 是否
2. 如果，假如，倘若，假若
3. 即使
4. 虽然，尽管
5. 要是
6. 无论何时
7. 当
8. 每一次...的时候（总是会）
9. 每次
10. 与 will 或 would 连用，表示客气地请求
11. 用于表示情感的动词或形容词之后
12. 请对方听自己的意见
13. 置于 could、may 或 might 之前，以提出建议或客气地打断别人的话
14. 谈及可能发生或不发生的事时说
15. 表达看法，或用在否定句之后表示反面意见才对

n.(名词)

1. 条件，限制条件，限定
2. 设想
3. 不确定的情况
4. DOS命令：测试并确定某特定条件真伪
5. 假如，假设，假定
6. 不确定的事，无把握的事，有疑问的事
7. 推测
8. 疑问

abbr.(缩略词)

1. intermediate frequency 【物】中间频率

conj.(连词)

1. 如果,假如 on condition that; supposing
2. 是否 whether
3. 即使,虽然 although
4. 无论何时 when(ever)

Often pronounced /'ɪf/ at the beginning of the sentence. 在句首常重读。

1.(表示条件或假设)假如，如果，要是
You useif in conditional sentences to introduce the circumstances in which an event or situation might happen, might be happening, or might have happened.

e.g. She gets very upsetif I exclude her from anything...
要是有什么事情我不让她参加,她会非常难过。
e.g. You'll feel a lot better about yourselfif you work on solutions to your upsetting situations...
如果你设法找到解决自己麻烦的办法,你自我感觉会好得多。

2.(用于间接疑问句)是否
You useif in indirect questions where the answer is either 'yes' or 'no'.

e.g. He askedif I had left with you, and I said no...
他问我是否和你一块儿离开的,我说不是。
e.g. I wonderif I might have a word with Mr Abbot?
请问我能否和阿博特先生说几句话？

3.(表示与句子主要部分的陈述稍有不同)即便，纵然，虽然
You useif to suggest that something might be slightly different from what you are stating in the main part of the sentence, for example that there might be slightly more or less of a particular quality.

e.g. Sometimes, that standard is quite difficult,if not impossible, to achieve...
有时即便有可能达到那个标准，那也是非常困难。
e.g. I'm working on my fitness and I will be ready in a couple of weeks,if not sooner...
我正在调养身体,最多两三周以后就可以了。

4.如果…可以的话(通常与can，could, may 或 might 连用,在谈话中礼貌地提出自己的观点、转换话题或打断对方)
You useif, usually with 'can', 'could', 'may', or 'might', at a point in a conversation when you are politely trying to make a point, change the subject, or interrupt another speaker.

if是什么意思

e.g. if I could just make another small point about the weightlifters in the Olympics...
请允许我就有关奥运会举重运动员的问题再补充一点。
e.g. So,if we may return strictly to athletics again for a few minutes...
因此,如果我们可以再花几分钟重新回到田径运动话题上来的话……

5.(用于句首，表示礼貌地请求某人做某事)
You useif at or near the beginning of a clause when politely asking someone to do something.

e.g. I wonderif you'd be kind enough to give us some information, please?
请问您能不能给我们提供一些信息？
e.g. if you will just sign here, we will arrange for your bank to deduct your payments automatically.
麻烦您在这里签一下字,我们将联系您的银行自动扣除您的付款。

6.(用于引导从句中较次要的事实)即便
You useif to introduce a subordinate clause in which you admit a fact which you regard as less important than the statement in the main clause.

e.g. if there was any disappointment it was probably temporary...
即便有点儿失望,也肯定是暂时的。
e.g. Evenif I'm overstating the case for nutrition, at least it will result in the woman being in charge of her own symptoms...
即便我夸大了营养的重要性,但至少它会让这个女人知道关注自己的症状。

7.要是不;即使不
You useif not in front of a word or phrase to indicate that your statement does not apply to that word or phrase, but to something closely related to it that you also mention.

e.g. A number of recent advances hold outif not the hope of a cure, then at least the possibility of some drug which could stop the spread of the virus...
近来的一些进展即使不能提供治愈的希望,也至少有望研制出来某种药物来阻止病毒的传播。
e.g. She understood his meaning,if not his words, and took his advice.
她即便没听懂他的话,也明白了他的意思,并且接受了他的建议。

8.(用于过去时,加强语气)如果真的…
You useif ever with past tenses when you are introducing a description of a person or thing, to emphasize how appropriate it is.

e.g. I became a distraught, worried mother, a useless roleif ever there was one...
我变成了一个忧心如焚的母亲,一个全无用处的角色。
e.g. if ever there was the right person in the right job it was she...
要是真的有才尽其用的人,那就是她。

9.(与过去时连用，引出一个相对合理的理由)即使仅仅为了(或因为)…
You useif only with past tenses to introduce what you think is a fairly good reason for doing something, although you realize it may not be a very good one.

e.g. She writes me often,if only to scold me because I haven't written to her...
她常来信,即使仅仅为了责怪我还没回信给她。
e.g. A one-to-one meeting with the US President was necessary,if only for a deeper exchange of views.
与美国总统一对一的会谈是必要的,即便仅仅是为了双方观点更深入的交流。

10.要是…多好
You useif only to express a wish or desire, especially one that cannot be fulfilled.

if的解释

e.g. if only you had told me that some time ago...
要是你早些时候告诉我该多好啊！
e.g. if only it were that simple!...
要是那么简单就好了！

11.(表示判断)好像,仿佛,似乎
You useas if when you are making a judgment about something that you see or notice. Your belief or impression might be correct, or it might be wrong.

if的翻译

e.g. The whole room looks asif it has been lovingly put together over the years...
整个房间看起来好像是经过了多年的精心布置。
e.g. His heart was pounding, asif he were frightened.
他的心怦怦跳,似乎被吓坏了。

12.(表示类比)好像，仿佛，似乎
You useas if to describe something or someone by comparing them with another thing or person.

if是什么意思

e.g. He points two fingers at his head, asif he were holding a gun...
他把两根手指指向他的头,仿佛他正举着一支枪。
e.g. The two cousins looked asif they'd been carved from blocks of ice.
两个堂姊妹看起来像由冰块雕刻而成。

13.(强调某物不是真的)好像…一样,仿佛,似乎
You useas if to emphasize that something is not true.

e.g. My husband, for some unknown reason, suggested that I loved my birds more than him: asif I would...
我丈夫,莫名其妙地,暗示我爱鸟甚于爱他：仿佛我真如此似的。
e.g. Getting my work done! My God! Asif it mattered.
把我的工作做完！老天！好像它真的很重要似的。

14.要说真有什么的话;甚至正相反
You use 'if anything' to introduce something which strengthens or changes the meaning of the statement you have just made, but only in a small or unimportant way.

e.g. Living together didn't harm our friendship.if anything it strengthened it...
在一起住并没有损害我们的友谊。要说真有什么的话,它反而巩固了我们的友谊。
e.g. Asthma drugs are not addictive and you don't need to keep increasing the dose.if anything, the reverse is true.
哮喘药物不会造成药物依赖,你不用持续增大剂量。甚至正相反,减小剂量才对。

15.显然不是
You use 'It's not as if' to introduce a statement which, if it were true, might explain something puzzling, although in fact it is not true.

e.g. I am surprised by the fuss she's making. It's not asif my personality has changed.
她的大惊小怪令我很吃惊。显然不是我的个性改变了。

16.(用于给人建议)如果我是你的话
You say 'if I were you' to someone when you are giving them advice.

e.g. if I were you, Mrs Gretchen, I just wouldn't worry about it...
要是我是你,格蕾琴夫人,我一点都不会担心。
e.g. What I'd doif I were you is be nice to him...
如果我是你,我要做的就是对他好。

1. 条件语句：其次,批处理文件是一种简单的程序,可以通过条件 语句(if)和流程控制语句(goto)来控制命令运行的流程,在批处理中也可以使用循环语句(for)来循环执行一条命令.

2. if什么意思

2. 条件函数：掌握公式复制过程中的三种引用(相对引用、绝对引用、混合引用),条件函数(if)和函数套用方法;了解函数在表格中的应用. 掌握自动筛选数据的设置方法(筛选状态设置、单一以及多重条件筛选),创建多重筛选条件区的方法,

3. if的翻译

3.if：induction field; 感应电场

4.if：internal focusing; 内聚焦

5.if：inductive magnetic field; 感应磁场

6.if：immuno-fluorescence; 免疫荧光

7. if的翻译

7.if.：infielder; 内野手

Do you know if he's married?

他结婚没结婚，你知道吗？

I can give you a round neckline if you prefer.

如果您喜欢我可以给您开个圆领口。

if he wins and it's a big if he'll be the first Englishman to win for twenty years.

假使他赢了－－是否能赢还是一大疑问－－他将是二十年来第一个获胜的英国人。

She glares at me if I go near her desk.

我一走近她的办公桌，她就瞪我。

Why not,if the conditions permit.

如果条件允许，没什么不可以的。

if these terms are not acceptable to you, we may suggest others.

如果你对这些条件不合意，我们可提出别的条件。

if she needs salvation, she will posit a savior.

如果她需要救助，她就会设想一个救助者。

Imagine if everyone did just a few of these atonce?Here is my list.

设想一下每个人立刻做了其中的一些事情会如何。

if I were you, Mrs Gretchen, I just wouldn't worry about it...

要是我是你,格蕾琴夫人,我一点都不会担心。

I am surprised by the fuss she's making. It's not as if my personality has changed.

她的大惊小怪令我很吃惊。显然不是我的个性改变了。

Asthma drugs are not addictive and you don't need to keep increasing the dose. if anything, the reverse is true.

哮喘药物不会造成药物依赖,你不用持续增大剂量。甚至正相反,减小剂量才对。

Living together didn't harm our friendship. if anything it strengthened it...

在一起住并没有损害我们的友谊。要说真有什么的话,它反而巩固了我们的友谊。

Getting my work done! My God! As if it mattered.

把我的工作做完！老天！好像它真的很重要似的。

My husband, for some unknown reason, suggested that I loved my birds more than him: as if I would...

我丈夫,莫名其妙地,暗示我爱鸟甚于爱他：仿佛我真如此似的。

The two cousins looked as if they'd been carved from blocks of ice.

两个堂姊妹看起来像由冰块雕刻而成。

He points two fingers at his head, as if he were holding a gun...

他把两根手指指向他的头,仿佛他正举着一支枪。

His heart was pounding, as if he were frightened.

他的心怦怦跳,似乎被吓坏了。

The whole room looks as if it has been lovingly put together over the years...

整个房间看起来好像是经过了多年的精心布置。

if only it were that simple!...

要是那么简单就好了！

if only you had told me that some time ago...

要是你早些时候告诉我该多好啊！

A one-to-one meeting with the US President was necessary, if only for a deeper exchange of views.

与美国总统一对一的会谈是必要的,即便仅仅是为了双方观点更深入的交流。

She writes me often, if only to scold me because I haven't written to her...

她常来信,即使仅仅为了责怪我还没回信给她。

if ever there was the right person in the right job it was she...

要是真的有才尽其用的人,那就是她。

I became a distraught, worried mother, a useless role if ever there was one...

我变成了一个忧心如焚的母亲,一个全无用处的角色。

She understood his meaning, if not his words, and took his advice.

她即便没听懂他的话,也明白了他的意思,并且接受了他的建议。

A number of recent advances hold out if not the hope of a cure, then at least the possibility of some drug which could stop the spread of the virus...

近来的一些进展即使不能提供治愈的希望,也至少有望研制出来某种药物来阻止病毒的传播。

Even if I'm overstating the case for nutrition, at least it will result in the woman being in charge of her own symptoms...

即便我夸大了营养的重要性,但至少它会让这个女人知道关注自己的症状。

if there was any disappointment it was probably temporary...

即便有点儿失望,也肯定是暂时的。

if you will just sign here, we will arrange for your bank to deduct your payments automatically.

麻烦您在这里签一下字,我们将联系您的银行自动扣除您的付款。

I wonder if you'd be kind enough to give us some information, please?

请问您能不能给我们提供一些信息？

So, if we may return strictly to athletics again for a few minutes...

因此,如果我们可以再花几分钟重新回到田径运动话题上来的话……

if I could just make another small point about the weightlifters in the Olympics...

请允许我就有关奥运会举重运动员的问题再补充一点。

I'm working on my fitness and I will be ready in a couple of weeks, if not sooner...

我正在调养身体,最多两三周以后就可以了。

Sometimes, that standard is quite difficult, if not impossible, to achieve...

有时即便有可能达到那个标准，那也是非常困难。

I wonder if I might have a word with Mr Abbot?

请问我能否和阿博特先生说几句话？

He asked if I had left with you, and I said no...

他问我是否和你一块儿离开的,我说不是。

You'll feel a lot better about yourself if you work on solutions to your upsetting situations...

如果你设法找到解决自己麻烦的办法,你自我感觉会好得多。

She gets very upset if I exclude her from anything...

要是有什么事情我不让她参加,她会非常难过。

1. if you demand his presence,warn him in advance.
   如果你要他来,就事先通知他。
2. if you will be so kind as to help us, we can finish by six.
   如果你愿意帮助我们,到六点时咱们就能完成了。
3. if you were a bird,you could fly.
   如果你是鸟,你就能飞行了。
4. I should have talked to mother if I had thought of it.
   如果当初我想到了,我就和妈妈说了。
5. if I were to ask him for a loan,would he agree ?
   如果我向他借钱的话,他能同意吗?
6. if it should rain tomorrow,the rally would be postponed.
   要是明天下雨,群众大会就会延期举行。
7. if I were an architect,I'd redesign this house.
   如果我是建筑师,我会重新设计这房子。
8. if it were up there, it would be easier to find.
   如果它在那儿,就会更容易被找到。
9. if had anything happened, he would have let me know.
   如果当初发生了什么事,他会让我知道的。
10. if necessary, give me a ring.
    如果需要,给我打个电话。
11. He will come, if invited.
    如果受到邀请,他会来的。
12. if only somebody had told us, we could have warned you.
    如果有人告诉了我们,我们就能事先提醒你。
13. We will go even if it rains.
    即使下雨,我们也要去。
14. if he is poor, at least he is honest.
    他虽然穷,但至少是诚实的。
15. I don't know if he was there.
    我不知道他当初是否在那里。
16. I wonder if it is the right size.
    我不知道尺寸是否合适。
17. I will see if he wants to talk to you.
    我去了解一下他是否想和你谈话。
18. if I haven't repeated the mistake!
    我真不该重犯这样的错误。
19. And if he didn't try to knock me down!
    令人惊奇的是他竟没把我打倒。
20. if ever eyes could speak, hers did very plainly.
    如果眼睛能说话,她的眼睛可说得清楚极了。
21. Peter is a lummox, if ever I saw one.
    如果彼得不是笨蛋,那么在世界上就没有笨蛋了。
22. I shall call you again next week when or if I have a chance.
    如果可能,下周我会再给你打电话。
23. I shall take you round America next year when, or if I get extra vacation.
    如果我有多余的假期,明年我会带你去美国。
24. What if she found out that you've broken her necklace?
    要是她发现你弄坏了她的项链,怎么办呢?
25. What if he was faithless to his friends and to his wife?
    要是他对妻子和朋友不忠怎么办?
26. if only I know!
    假如我知道那就好了。
27. if only he could arrive in time.
    要是他能及时赶来就好了。

if anything

更可能的是,总之 express a tentative opinion or after a negative statement to say that the opposite is true

if not

更可能的是,总之 otherwise

• if%20anything">if anything如果有什么的话...
• if%20only">if only要是 ... 多好...
• if%20not">if not不然的话
• if">as if犹如，好像，好似，仿...
• if%20any">if any若有的话
• if">only if 只有当(只是在 ....
• if%20and%20when">if and when如果
• if%20possible">if possible如有可能
• if%20necessary">if necessary必要时
• if%20so">if so如果是这样的话...
• if%20by%20magic">as if by magic不可思议地
• if">what if如果 ... 将会怎...
• if%20you%20please">if you please随你便(如果你高兴的...
• if%20you%20like">if you like如果你愿意
• if%20not">nothing if not尤其
• if%20need%20be">if need be如果需要的话...
• if%20one%20is%20standing%20on%20one%27s%20head%20or%20one%27s%20heels">not know if one is standing on one's head or one's heels晕头转向,昏头昏脑...
• if%20one%20came%20out%20of%20a%20bandbox">look as if one came out of a bandbox装束得十分整洁...
• if_2E">if.=informati...
• cap帽子

• I'll be hanged if I ever give you anything.

  出自：J. Carlyle

• I'm blessed if I know.

  出自：F. W. Crofts

• if the fish smells clean..chances are it is fresh.

  出自：C. Claiborne

• I wasn't to worry if I found his tablets in the bathroom.

  出自：O. Norton

假期

B：Sounds (nice/ exciting/ thrilling).
听起来（不错/很刺激/惊险）。

if的反义词

A：You’re welcome to join meif you want.
如果你愿意欢迎你加入我们。

请求帮助

A：Do you mindif I ask you a favor?
我可以请您帮个忙吗?

B：No, not at all.
没问题，完全可以。

经典对话

A：Is this seat empty?
这个座位是空的吧？

if的近义词

B：Yes, and this one will beif you sit down.
是的，如果你坐下，我的座位就是空的。

conj.(连词)

1. if作为从属连词,可引导条件状语从句、让步状语从句和名词从句。
2. if引导条件状语从句,从句可为真实条件从句,也可为虚拟条件从句。如为真实条件从句,谓语用陈述语气,表示可能性很大,作“假使”“如果”解,通常用一般现在时代替一般将来时; 如果if从句中用will,表示意愿。从句如为虚拟条件从句,谓语动词要用虚拟语气,表示可能性不大或与过去事实相反,作“要是,假如”解。可指过去的情况,也可指现在和将来的情况。指将来情况时可用were to或should。在现代口语中,一、三人称后常用was代替were。if引导的虚拟条件句中,助动词were,should,had可以移至主语前,此时if可省略。
3. if引导的条件从句中可以省略be和主语。
4. if引导的条件从句,有时后接only以加强其语气,表示说话人非常盼望某人提出的条件能够实现。
5. if可引导让步状语从句,作“虽然,即使”解,常和even连用。
6. if可引导名词性从句,作“是否”解,常放在ask, doubt, know, learn, see, wonder等动词后。一般用在口语中,而且不能用于句首。
7. if可以表示惊奇或愤怒。用于陈述语气的否定句时,意义则是肯定的。
8. if ever...在现代英语中,表示强调,用于加强主句的意思,往往含有否定意思。
9. When or if〔when, or if〕表示从句所说的也许不会实现。
10. if any的意思是“如果有的话”。
11. if only可表示对现时或未来的愿望,也可表示与过去事实相反的愿望,作“只要…但愿,要是…就好了”解。
12. What will happen if...?意思是“要是…怎么办”。常缩略成What if...?
13. if not后可加动词,通常动词省略,可用于现在时态或现在完成时态,表示“要不,不然”; 也可用于yes〔no〕疑问句之后,表示“许诺,告诫”。

conj.(连词)

if, in case

这两个词(组)的共同意思是“以防万一”。二者均可引导条件从句,其区别是：

if可用于任何时间,而in case只指将来时间。例如:

I am taking an umbrella in case it rains later on.

我带着一把伞,以防一会儿下雨。

I'll take an umbrella if it rains later on.

要是一会儿下雨,我就拿把伞。

if, whether

这两个词的共同意思是“假使,如果”。

1.if从句可以表示希望; 而whether从句单纯表示事实。

2.if不能用在介词之后的间接疑问句中; 而whether可以。

3.if不能用在“to+动词原形”的前面; 而whether可以。

4.if不能引导主语、表语从句; 而whether可以。

if...not, unless

参见unless条。

if，whether

这两个连接词均含“是否”之意。

if作“是否”解时，多用于口语，引出宾语从句，不能直接跟or not连用。

whether多用于书面语中，可与or或or not连用，除引出宾语从句外，还可引出主语从句、表语从句、同位语从句或与不定式连用。

conj.(连词)

我想知道她是否发现了什么。

误 I wonder if she found something.

正 I wonder if she found anything.

析 if引导的从句中,通常用any, anything, anybody, anywhere作从句的宾语,而不用some, something, somebody, somewhere。

• ☆ 直接源自古英语的gif，意为如果，假设。