英 [ɪf] 美 [ɪf]
conj. （表条件）如果；（表假设）要是，假如；无论何时；虽然，即使；（用于间接疑问）是否；（用于礼貌问询）是否；当，每次；（与情态动词连用）表婉转客气；这不是……，要是……多好；或许不；就算；尽管
n. 条件，设想；不确定的情况
if /ɪf/ CET4 TEM4
连词 You use if in conditional sentences to introduce the circumstances in which an event or situation might happen, might be happening, or might have happened. (引导条件从句) 如果
She gets very upset if I exclude her from anything.
如果有什么事我将她排除在外，她就会非常难过。
You can go if you want.
如果你想走就走吧。
连词 You use if in indirect questions where the answer is either "yes" or "no." (用于间接是非问句中) 是否
He asked if I had left with you, and I said no.
他问我是不是和你一起离开的，我说不是。
连词 You use if 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. (表示与主句所述事实可能有少许不同) 即使
Sometimes that standard is quite difficult, if not impossible, to achieve.
有时那个标准，即使并非不可能，也是很难达到的。
连词 You use if, usually with "can," "could," "may," or "might," in a conversation when you are politely trying to make a point, change the subject, or interrupt another speaker. 常与(can)、(could)、(may)、(might)等情态动词连用，表示婉转客气
If I could just make another small point about the weightlifters in the Olympics.
请允许我就奥运会的举重运动员们再稍说一句。
连词 You use if at or near the beginning of a clause when politely asking someone to do something. (用于从句句首或靠近句首的位置，表示礼貌的请求) 是否
I wonder if you'd be kind enough to give us some information, please?
不知能否请您向我们提供些信息？
习语 You use if 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. 即便不
She understood his meaning, if not his words, and took his advice.
她即便不懂他的语言，也明白了他的意思，并且接受了他的建议。
连词 You use if to introduce a subordinate clause in which you admit a fact that you regard as less important than the statement in the main clause. (引导从句，提出次要的事实) 即使
If there was any disappointment it was probably temporary.
即使有任何遗憾，可能也是暂时的。
习语 You use if ever with past tenses when you are introducing a description of a person or thing, to emphasize how appropriate it is. (与过去式连用，强调对人或事物的描述极为恰当) 如果有…的话
I became a distraught, worried mother, a useless role if ever there was one.
如果有个心烦意乱、忧心忡忡的母亲，一个完全无用的角色，那就是我。
习语 You use if 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. 即使仅仅 (与过去式连用，引出能勉强说明做某事的原因)
She always writes me once a month, if only to scold me because I haven't answered her last letter yet.
她总是一个月写一封信给我，即使仅仅是为了责备我还没有回她的上一封信。
习语 You use if only to express a wish or desire, especially one that cannot be fulfilled. (尤指不能实现的愿望) 要是…多好
If only you had told me that some time ago.
要是你之前告诉我那件事该多好。
习语 You use as 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. (表示判断) 好像
It looked as if she had forgotten how to breathe.
她看上去好像是忘了如何呼吸似的。
习语 You use as if to describe something or someone by comparing them with another thing or person. (表示类比) 仿佛
He points two fingers at his head, as if he were holding a gun.
他用两个手指对着自己的脑袋，仿佛正拿着一把枪。
习语 You use as if to emphasize that something is not true. (强调某事不是真的) 好像…一样
Getting my work done! My God! As if it mattered.
把我的活儿干完！我的天哪！好像这很要紧似的。
If is a 2013 single by Scottish Indie rock band Glasvegas. It was released on 8 July 2013.
如果-引用次数：148
If "being" is translated into "to be",there is no such misunderstanding.
如果用"是"来翻译,则没有这样的问题。
参考来源“读不懂”的柏拉图(下)
假如
中频 (intermediate frequency)
中频 (intermediate frequency)
中 (intermediate frequency)
中间丝 (intermediate filament)
（可选） 如果 (if)：用于验证指定的属性是否存在，若不存在，所在 target 将不会被执行。
...中的校准系数，来自ADC的代码被转换成发射功率读数。该功率读数与设定点的功率水平进行比较。如果发现设定值与实测功率之间的任何差异，可以在信号链中许多点之间的任何一点进行功率调节。可以调整驱动射频的基带数据的幅度，可以调整射频或中频(IF)可变增益放大器(VGA)，或者改变HPA的增益的。这样一来，增益控制回路调节自身并在理想限度内保持发射功率。
假如(If)是「闲赢了， 则两人合计赢了两百元，借使「闲输了，则两人合计输了两百零五元。
为了完善现有期刊评价指标，2016年12月，爱思唯尔推出了名为“CiteScore”（简称CS）的新指标。与影响因子（IF）指数以两年为引证时间窗口、只关注被引文献数量不同，CS将引证时间窗口设置为三年，并关注某期刊前三年发表的全部文献在统计当年...
条件；设想
I'll be there if poss.
如果可能我会去那里的。
If I were in charge...
假若由我负责…
I'm damned if I'll apologize!
我决不道歉！
No one knew if they could get the spacecraft back to Earth, or if they could survive long enough to return.
VOA : special.2009.07.22
The final exam: you should do well if you read, and if you come to lecture and if you attend section.
期末考：如果你读了，上课了，讨论了,期末考试对你来说将轻而易举。
1945年后的美国小说课程节选 : 耶鲁公开课
If my code is correct, what should the average price be, after say, 100 days, if there's no bias. Pardon?
如果我的代码没写错的话，如果没有偏向值那平均价格会是多少呢，如果没有偏向值，请说？
计算机科学及编程导论课程节选 : 麻省理工公开课
If they had, they would have been tested to see if they needed treatment to prevent an infection like H.I.V.or hepatitis.
VOA : special.2010.02.10
If the tests show a high possibility, a married couple must decide if they want to risk a pregnancy.
VOA : special.2010.03.23