as of 与as if你都分不清，还干甚培训 as的用法
\u6c42if \u548c as if\u5728\u4f7f\u7528\u4e0a\u7684\u533a\u522b\uff0c\u6c42\u8be6\u7ec6\u8bb2\u89e3\u4e00\u4e0b\u30021. CONJYou use
if in conditional sentences to introduce the circumstances in which an
event or situation might happen, might be happening, or might have happened.
(\u5f15\u5bfc\u6761\u4ef6\u4ece\u53e5) \u5982\u679c
\u4f8b\uff1aShe gets very upset if I exclude her from anything.
\u5982\u679c\u6709\u4ec0\u4e48\u4e8b\u6211\u5c06\u5979\u6392\u9664\u5728\u5916\uff0c\u5979\u5c31\u4f1a\u975e\u5e38\u96be\u8fc7\u3002
\u4f8b\uff1aYou can go if you want.\u5982\u679c\u4f60\u60f3\u8d70\u5c31\u8d70\u5427\u3002
2. CONJYou use
if in indirect questions where the answer is either "yes" or "no."
(\u7528\u4e8e\u95f4\u63a5\u662f\u975e\u95ee\u53e5\u4e2d) \u662f\u5426
\u4f8b\uff1aHe asked if I had left with you, and I said no.\u4ed6\u95ee\u6211\u662f\u4e0d\u662f\u548c\u4f60\u4e00\u8d77\u79bb\u5f00\u7684\uff0c\u6211\u8bf4\u4e0d\u662f\u3002
3. CONJYou 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. (\u8868\u793a\u4e0e\u4e3b\u53e5\u6240\u8ff0\u4e8b\u5b9e\u53ef\u80fd\u6709\u5c11\u8bb8\u4e0d\u540c) \u5373\u4f7f
\u4f8b\uff1aSometimes that standard is quite difficult, if not impossible, to achieve.
\u6709\u65f6\u90a3\u4e2a\u6807\u51c6\uff0c\u5373\u4f7f\u5e76\u975e\u4e0d\u53ef\u80fd\uff0c\u4e5f\u662f\u5f88\u96be\u8fbe\u5230\u7684\u3002
4. CONJYou 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. \u5e38\u4e0e(can)\u3001(could)\u3001(may)\u3001(might)\u7b49\u60c5\u6001\u52a8\u8bcd\u8fde\u7528\uff0c\u8868\u793a\u5a49\u8f6c\u5ba2\u6c14
\u4f8b\uff1aIf I could just make another small point about the weightlifters in the Olympics.
\u8bf7\u5141\u8bb8\u6211\u5c31\u5965\u8fd0\u4f1a\u7684\u4e3e\u91cd\u8fd0\u52a8\u5458\u4eec\u518d\u7a0d\u8bf4\u4e00\u53e5\u3002
5. CONJYou use
if at or near the beginning of a clause when politely asking someone to
do something. (\u7528\u4e8e\u4ece\u53e5\u53e5\u9996\u6216\u9760\u8fd1\u53e5\u9996\u7684\u4f4d\u7f6e\uff0c\u8868\u793a\u793c\u8c8c\u7684\u8bf7\u6c42) \u662f\u5426[\u793c\u8c8c]
\u4f8b\uff1aI wonder if you'd be kind enough to give us some information, please?
\u4e0d\u77e5\u80fd\u5426\u8bf7\u60a8\u5411\u6211\u4eec\u63d0\u4f9b\u4e9b\u4fe1\u606f\uff1f
6. PHRASEYou
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. \u5373\u4fbf\u4e0d
\u4f8b\uff1aShe understood his meaning, if not his words, and took his advice.
\u5979\u5373\u4fbf\u4e0d\u61c2\u4ed6\u7684\u8bed\u8a00\uff0c\u4e5f\u660e\u767d\u4e86\u4ed6\u7684\u610f\u601d\uff0c\u5e76\u4e14\u63a5\u53d7\u4e86\u4ed6\u7684\u5efa\u8bae\u3002
7. CONJYou 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. (\u5f15\u5bfc\u4ece\u53e5\uff0c\u63d0\u51fa\u6b21\u8981\u7684\u4e8b\u5b9e) \u5373\u4f7f
\u4f8b\uff1aIf there was any disappointment it was probably temporary.
\u5373\u4f7f\u6709\u4efb\u4f55\u9057\u61be\uff0c\u53ef\u80fd\u4e5f\u662f\u6682\u65f6\u7684\u3002
8. PHRASEYou
use if ever with past tenses when you are introducing a description of a
person or thing, to emphasize how appropriate it is. (\u4e0e\u8fc7\u53bb\u5f0f\u8fde\u7528\uff0c\u5f3a\u8c03\u5bf9\u4eba\u6216\u4e8b\u7269\u7684\u63cf\u8ff0\u6781\u4e3a\u6070\u5f53) \u5982\u679c\u6709\u2026\u7684\u8bdd[\u5f3a\u8c03]
\u4f8b\uff1aI became a distraught, worried mother, a useless role if ever there was one.
\u5982\u679c\u6709\u4e2a\u5fc3\u70e6\u610f\u4e71\u3001\u5fe7\u5fc3\u5fe1\u5fe1\u7684\u6bcd\u4eb2\uff0c\u4e00\u4e2a\u5b8c\u5168\u65e0\u7528\u7684\u89d2\u8272\uff0c\u90a3\u5c31\u662f\u6211\u3002
9. PHRASEYou
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.
\u5373\u4f7f\u4ec5\u4ec5 (\u4e0e\u8fc7\u53bb\u5f0f\u8fde\u7528\uff0c\u5f15\u51fa\u80fd\u52c9\u5f3a\u8bf4\u660e\u505a\u67d0\u4e8b\u7684\u539f\u56e0)
\u4f8b\uff1aShe always writes me once a month, if only to scold me because I haven't answered her last letter yet.
\u5979\u603b\u662f\u4e00\u4e2a\u6708\u5199\u4e00\u5c01\u4fe1\u7ed9\u6211\uff0c\u5373\u4f7f\u4ec5\u4ec5\u662f\u4e3a\u4e86\u8d23\u5907\u6211\u8fd8\u6ca1\u6709\u56de\u5979\u7684\u4e0a\u4e00\u5c01\u4fe1\u3002
10. PHRASEYou
use if only to express a wish or desire, especially one that cannot be
fulfilled. (\u5c24\u6307\u4e0d\u80fd\u5b9e\u73b0\u7684\u613f\u671b) \u8981\u662f\u2026\u591a\u597d[\u60c5\u611f]
\u4f8b\uff1aIf only you had told me that some time ago.
\u8981\u662f\u4f60\u4e4b\u524d\u544a\u8bc9\u6211\u90a3\u4ef6\u4e8b\u8be5\u591a\u597d\u3002
11. PHRASEYou 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. (\u8868\u793a\u5224\u65ad) \u597d\u50cf
\u4f8b\uff1aIt looked as if she had forgotten how to breathe.
\u5979\u770b\u4e0a\u53bb\u597d\u50cf\u662f\u5fd8\u4e86\u5982\u4f55\u547c\u5438\u4f3c\u7684\u3002
12. PHRASEYou use as if to describe something or someone by comparing
them with another thing or person. (\u8868\u793a\u7c7b\u6bd4) \u4eff\u4f5b
\u4f8b\uff1aHe points two fingers at his head, as if he were holding a gun.
\u4ed6\u7528\u4e24\u4e2a\u624b\u6307\u5bf9\u7740\u81ea\u5df1\u7684\u8111\u888b\uff0c\u4eff\u4f5b\u6b63\u62ff\u7740\u4e00\u628a\u67aa\u3002
13. PHRASEYou use as if to emphasize that something is not true.
(\u5f3a\u8c03\u67d0\u4e8b\u4e0d\u662f\u771f\u7684) \u597d\u50cf\u2026\u4e00\u6837[\u53e3\u8bed]
\u4f8b\uff1aGetting my work done! My God! As if it mattered.
\u628a\u6211\u7684\u6d3b\u513f\u5e72\u5b8c\uff01\u6211\u7684\u5929\u54ea\uff01\u597d\u50cf\u8fd9\u5f88\u8981\u7d27\u4f3c\u7684\u3002
as if \u4ece\u53e5\u7684\u4f5c\u7528
1\uff0e\u5f15\u5bfc\u8868\u8bed\u4ece\u53e5\uff0c \u5e38\u4e0eas,look, seem,feel,taste,smell,sound\u7b49\u7cfb\u52a8\u8bcd\u8fde\u7528\u3002
\u5982\uff1aShe looks as if she were ten years younger\uff0e
\u5979\u770b\u8d77\u6765\u597d\u50cf\u5e74\u8f7b\u4e86\u5341\u5c81\u3002
2. \u5f15\u5bfc\u65b9\u5f0f\u72b6\u8bed\u4ece\u53e5\uff0c\u8868\u793a\u201c\u4e8b\u60c5\u662f\u600e\u4e48\u505a\u7684\u201d\u6216\u201c\u4e00\u4e2a\u4eba\u6216\u4e8b\u7269\u662f\u4ec0\u4e48\u6837\u7684\u201d\u3002
\u5982\uff1a
\u5982\uff1aShe loves the boy as if she were his mother\uff0e
\u5979\u7231\u8fd9\u7537\u5b69\uff0c\u5c31\u597d\u50cf\u5979\u662f\u4ed6\u7684\u5988\u5988\u4e00\u6837\u3002
3.as if \u8fd8\u53ef\u7528\u4e8e\u7701\u7565\u53e5\u4e2d\uff0c\u5982\u679cas if \u5f15\u5bfc\u7684\u4ece\u53e5\u662f\u201c\u4e3b\u8bed+\u7cfb\u52a8\u8bcd\u201d\u7ed3\u6784\uff0c\u53ef\u7701\u7565\u4e3b\u8bed\u548c\u7cfb\u52a8\u8bcd\uff0c\u8fd9\u6837as if \u540e\u5c31\u53ea\u5269\u4e0b\u540d\u8bcd\u3001\u4e0d\u5b9a\u5f0f\u3001\u5f62\u5bb9\u8bcd\uff08\u77ed\u8bed\uff09\u3001\u4ecb\u8bcd\u77ed\u8bed\u6216\u5206\u8bcd\u3002
\u5982\uff1aHe acts as if \uff08he were\uff09 a fool\uff0e
\u4ed6\u505a\u4e8b\u50cf\u4e2a\u50bb\u5b50\u3002
1. only if 只有在……的时候(表示对条件的强调，通常引导部分倒装句)
例：
Only if we work together at the problem of environmental pollution, can we make the earth clean.
只有我们一块努力去解决环境污染问题，我们才能让地球清洁。
Only if we keep practicing oral English step by step, can we speak English fluently.
只有我们坚持一步一步地练习英语口语，我们才能够流利地说英语。
2. as if 似乎；好像（通常引导虚拟语气，等同于as though的含义）
例：Don’t handle the vase as if it were made of steel. ( 2012北京高三高考)
不要碰这个花瓶好像它是钢做的。
Who does that shop assistant think he is? He behaves as if he owned the grocery．
（2011年北京海淀区高三一模）
那店员认为他是谁呀？他表现得好像这家杂货店是他家的。
3. even if 虽然；即使（引导让步状语从句，等同于even though的含义）
例：
—Look at those clouds!
—Don’t worry. Even if it rains, we’ll still have a great time.（2012年北京高考）
—看看头顶上的那些乌云？
—别担心。即使下雨，我们依旧会玩得很尽兴。
He is so busy. He cannot afford enough time with his son even if he wants to.（2013年四川高考）
他太忙了。虽然他很想抽出时间陪他的儿子也没法实现。
本周四：你来挑挑错 答案 ：
1. I have studied very hard for many weeks中，将have改为had
2. I felt so proud as I thought my English was already excellent中，将as改为that
3. but I didn’t need to study English hard any longer.中，将but改为and
4. During the followed few months中，将followed改为following
5. nor I do my homework after the class中，在nor和I之间添加did
6. after the class, 删除the
7. we must take everything serious中，将serious改为seriously
8. keep a modest attitude towards my studies or work中，将my改为our
9. Like an old saying goes中，将like改为As
10. pride goes before failures中，将failures改为failure
解析 ：
1. 考查过去完成时。该故事是作者回忆他过去最开心的一天，切为过去发生的事对过去的影响。
2. 考查结果状语从句的引导词。so+形容词+that引导的从句表示“如此…以至于（产生什么结果）”
3. 考查连词。前后两句之间为顺承关系，故用and合适
4. 考查现在分词。following表示“接下来的”
5. 考查倒装句。nor+助动词（did）+主语表示“…也没有…”
6. 考查固定搭配。after class表示“下课后”
7. 考查副词。take something serious表示“将…严肃对待”
8. 考查形容词物主代词。根据we must take everything seriously中的主语可知
9. 考查介词。as表示“正如…”
10. 考查谚语。pride goes before failure表示“骄则必败”
希望能对你有帮助，望采纳！！！！
扩展阅读：as if 的用法和例句 ... as though和as if的用法 ... in spite of ... as if as though虚拟语气 ... only if ... in order that ... as of 的用法大全 ... ever since ... as of 中文翻译 ...
