Learner's definition of AS
1
: to the same degree or amount（程度或数量上）同样，一样 -
He has a lot of time but I don't have as much. [=I have less time than he has]他有很多时间，可我没那么多时间。
-
He has many books, but I have just as many. [=I have the same amount of books that he has]他有很多书，而我也有同样多的书。
-
He was angry, but she was just as angry.他生气了，可她和他一样生气。
2
formal —
used to introduce an example例如；诸如 2 as /ˈæz/ /əz/ conjunction
2 as
/ˈæz/ /əz/
conjunction
Learner's definition of AS
1
a —
used to make comparisons像…一样 —
usually used in the phrase as…as通常用于短语as…as -
The fabric was as soft as silk.这种布料像丝绸一样柔软。
-
He is every bit as clever as she (is).他和她一样那么聪明。
-
There are as many books here as (there are) there.这里的书和那里的一样多。
-
That was as delicious a meal as your last one (was). = That was a meal as delicious as your last one (was).那顿饭和你上一次的一样好吃。
-
as hard as a rock [=very hard]坚如磐石
-
as clear as crystal [=completely clear]如同水晶般清澈
-
as white as snow [=snow-white, pure white]洁白如雪
-
He is as brave as he is loyal.他既英勇无畏又赤胆忠心。
-
Her second book is twice as long as her first one.她第二本书的篇幅是她第一本书的两倍。
-
He's not as old as he claims to be.他并没有自己说的那么老。
—
sometimes used in negative phrases with so有时与so搭配用于否定短语 b —
used in the phrase as…as to say when something should be done, how often something should happen, etc.用于短语as…as以说明某事应完成的时间或发生的频率 -
Come back as often as you like.你想多久回来一次就多久回来一次。
-
If you're going to look for a new job, you should do it as soon/early/quickly as possible.如果你准备找份新工作，你就得尽快下手。
2
a : in the way that照…方式；和…一样 -
The letter “k” is sometimes silent, as it is in “knee.”字母k有时不发音，就像在knee这个单词中一样。
-
In the word “macho” the “ch” should be pronounced as (it is) in “China,” not as (it is) in “Chicago.”在单词macho中，ch的发音应该和在单词China中一样，不应该是Chicago中的发音。
-
Knowing him as I do [=because I know him well], I'm not surprised by his decision.以我对他的了解，我对他的决定不感到意外。
-
Do (it) as I do.照我的样子做。
-
I'll do it as I planned (to).我将按计划实施。
-
Sometimes a noun comes from a verb (as “publisher” comes from “publish”) and sometimes a verb comes from a noun (as “edit” comes from “editor”).有时名词源自动词（如publisher源自publish），而有时动词又源自名词（如edit源自editor）。
-
As it happens, I know his brother. [=I happen to know his brother]我碰巧认识他弟弟。
-
We planned a picnic but, as it happened, it rained that day. [=it happened to rain that day]我们原本安排了野餐，可碰巧那天下雨了。
-
We arrived late and, as it turned out, all the tickets were already sold. [=we learned that all the tickets were already sold when we arrived late]我们迟到了，结果票都卖光了。
-
He seemed to be having a midlife crisis, as many men do. = As is the case with many men, he seemed to be having a midlife crisis.就像很多男人一样，他似乎正在遭遇中年危机。
b —
used to introduce a statement which indicates that something being mentioned was known, expected, etc.正如；如同 -
He won the election, as you know. = As you know, he won the election.如你所知，他当选了。
-
As was only to be expected, the election was very close.不出所料，选举结果十分接近。
-
He is a foreigner, as is evident from his accent.他是外国人这一点从他讲话的口音就可分辨出来。
-
It rained that day, as often happens.正如常常出现的情况一样，那天下雨了。
-
Just as I suspected/thought! You've been drinking!不出我所料！你一直在喝酒！
c —
used in phrases with same与same搭配用于短语 -
He works in the same building as my brother. [=he and my brother work in the same building]他和我弟弟在同一个楼里上班。
-
I've got shoes the same as his. = I've got the same type of shoes as he has. [=my shoes and his shoes are the same]我有一双和他一样的鞋子。
-
He was fooled the same as I was. [=he and I were both fooled]他和我一样也被耍了。
4
: regardless of the degree to which : though虽然；尽管 -
Unaccustomed as I am to public speaking [=although I am unaccustomed to public speaking], I'd like to say a few words now.尽管不太习惯在公开场合讲话，我现在还是想说几句。
-
Improbable as it seems, it's still true. = (chiefly US) As improbable as it seems, it's still true. [=although it seems improbable, it's still true]尽管看起来不可能，但那却是真的。
-
Much as I respect him [=although I respect him very much], I still have to disagree with him on this point. = (chiefly US) As much as I respect him, I still have to disagree with him on this point.尽管我很尊重他，但在这个问题上我还是无法赞同他。
-
Try as he might [=no matter how hard he tried], he couldn't do it.不管他怎么努力也做不成这件事。
5
formal : for the reason that : because因为；由于 -
She stayed home as she had no car.因为没车，她就待在家里。
-
As I'm a pacifist, I'm against all wars.因为我是个和平主义者，我反对一切战争。
6
—
used to indicate that one relationship is like another relationship（关系）就像，相当于 7
—
used with so or such to indicate the result or effect of something以至于（与so或such连用表结果） — see also so as (below)
as against
: in comparison to (something)与…比较；与…相对照
as for
: with regard to : concerning至于；说到 -
He's here. As for the others, they'll arrive later. [=the others will arrive later]他来了。至于其他人，他们将晚些时候到。
-
He was a nice enough person, but as for his suggestions, I found them unhelpful.他人很好，但说到他的建议，我觉得没什么用。
as from
chiefly British
—
used to indicate the time or date when something begins从…开始；自…起
as if
or as though 1
: the way it would be if好像；似乎；仿佛 -
The plane looked as if it was going to crash.飞机看上去好像要坠落。
-
He was as sad as if he had lost his last friend.他那么伤心，仿佛失去了最后一个朋友一般。
-
The dog wagged its tail as if to say “Welcome back!” = The dog wagged its tail as if it was/were saying “Welcome back!”那条狗摇着尾巴，好像在说：“欢迎回来！”
-
The day seemed as though it would never end. = It seemed as though the day would never end.那一天好像永远也过不完。
2
: as someone would do if好像 3
—
used in spoken phrases to say that something is not true, will not happen, etc.好像，跟…似的（用于口语，表示某事不真实或不会发生） -
“She's afraid you might try to take the job yourself.” “As if I ever would!” [=I never would]“她担心你自己要干那份工作。”“好像我那样干过似的！”
-
“He'll never come back, you know!” “As if I cared!” [=I don't care]“他不会回来了，你知道！”“好像我在乎似的！”
4
◊ The phrase as if is sometimes used informally as an interjection to say that something suggested or claimed is impossible or very unlikely.短语as if有时用作感叹词，表示所提之事不大可能，非正式用法。
as is
chiefly US
: in the present condition without any changes按原样
as it is
1
: in the present condition按现状 2
: with the situation that exists now照目前情况
as it were
—
used to say that a statement is true or accurate in a certain way even if it is not literally or completely true可以说；简直是
as of
—
used to indicate the time or date when something begins从…开始
as to
1
: 2about -
I'm at a loss as to how to explain the error. [=I don't know how to explain the error]我不知道如何解释这个错误。
-
There is disagreement as to the causes of the fire.对于火灾的原因，目前存在不同看法。
-
I remained uncertain as to the value of his suggestions.他的这些建议价值如何，我有些拿不准。
so as
—
used to indicate the purpose of something以便 — see also 2as 7 (above) 3 as /ˈæz/ /əz/ preposition
3 as
/ˈæz/ /əz/
preposition
Learner's definition of AS
1
—
used to indicate how a person or thing appears, is thought of, etc.当作 -
They regarded/described the situation as (being) a disaster.他们认为这种情形是一场灾难。
-
Don't think of it as (being) a setback—think of it as (being) a challenge!别把这看作是挫折，要把它当成挑战。
-
Many people now regard him as a traitor.现在许多人认为他是叛徒。
2
—
used to indicate the condition, role, job, etc., of someone or something作为 -
Then she spoke as a child [=she was a child when she spoke then], but now she is speaking as an adult.那时候她以孩子的身份来讲话，但现在她站在成人的立场在讲话。
-
He has a job as an editor.他有一份编辑工作。
-
The policeman disguised himself as a beggar.那个警察伪装成乞丐。
-
Some people were surprised by his election as Governor.有些人对他当选州长感到意外。
-
The critics praised his performance as Othello.批评家对他扮演的奥赛罗角色颇为赞赏。
-
I like her both as a poet and as a novelist.我既喜欢她的诗，又喜欢她的小说。
-
As a pacifist, I'm against all wars.作为和平主义者，我反对一切战争。
-
Everyone rose as one. [=everyone rose together]大家一起站了起来。