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as的用法小結(jié)
英語是按照分布面積而言最流行的語言，但母語者數(shù)量是世界第三，僅次于漢語、西班牙語。它是學(xué)習(xí)最廣泛的第二語言，是近60個主權(quán)國家的官方語言或官方語言之一。下面為大家?guī)韆s的用法小結(jié)，快來看看吧。
as的用法小結(jié)
1.Child as[though]he was, he did quite well. 他雖是個孩子，但已干得很不錯。
2. 用作關(guān)系代詞，主要用法有二。如：
(1) 用在such, same, as等之后，引導(dǎo)限制性定語從句。如：
This is thesame watch as I lost. 這塊表跟我丟失的那塊一樣。
Such men as (=Those men who) heard of him praised him. 聽說過他的人都贊揚他。
(2) 單獨用作關(guān)系代詞，引導(dǎo)非限制性定語從句，可放在主句之前 (常譯為：正如)或之后 (常譯為：這一點)，且主從句之間一般要用逗號隔開。如：
He was absent, as is often the case. 他缺席了，這是常有的事。
As was expected, he succeeded at last. 正如我們所料，他終于成功了。
3. 用來表示目的，下面兩種句子結(jié)構(gòu)都可以。如：
仔細(xì)寫以便把每句話都寫清楚。
正：Write carefully so as to make every sentence clear.
正：Write so carefully as to make every sentence clear.
4. 在正式文體 (尤其是文學(xué)體裁)中，as后可用倒裝語序表示“…也一樣”這類意思 (現(xiàn)代英語通常so表示這一用法)。如：
He travelled agreat deal, as did most of his friends. 他去過許多地方旅游，他的多數(shù)朋友也是一樣。
He plays the piano, as does his mother. 他會彈鋼琴，他母親也會。
注：用作連詞，表示原因 (參見because)，表示時間 (參見when)。
5. 用于 as if
as though, 意為“仿佛”、“似乎”。兩者一般可通用 (但注意不能說 as although)。用法上注意幾點：
(1) as if [though] 可引導(dǎo)狀語從句和表語從句，從句謂語根據(jù)語義的要求，可用陳述語氣 (若可能為事實)或虛擬語氣 (若為假設(shè)或不太可能是事實)。如：
It looks as if it is going to rain. 天似乎要下雨了。
It seems as if you’re right. 似乎你是對的。
He talks asthough he knew everything. 他夸夸其談，好像無所不知。
When apencil is partly in a glass of water, it looks as if it werebroken. 當(dāng)把一支鉛筆的一部分放在一杯水里時，它看起來好像折斷了似的。
當(dāng)主句謂語是過去時態(tài)時，從句謂語常可用陳述語氣。如：
He pausedas though he found a difficulty. 他停了下來，似乎遇到了一個難題。
She felt as if she lost something. 他覺得似乎丟了什么東西。
(2) 當(dāng)從句主語與主句主語一致，且從句謂語中又包括有動詞be時，從句主語及其謂語中的動詞be通�？梢允∪�。如：
From time to time heturned round as though (he was) searching for someone. 他不時地四下張望，好像在找人。
He opened his mouth as if (he was)to speak. 他張開口，好像要說話似的。
6. 關(guān)于 as…as, 用法注意：
(1) 中間只能用形容詞或副詞的原級，不能用比較級或最高級。如果在第二個as之后使用獨立的人稱代詞，一般說來用主格 (較正式)或賓格 (非正式)均可。如：
He’s as old as she
her. 他年紀(jì)跟她一樣大。
注意：
要是第二個as之后的人稱代詞跟有謂語動詞，則該人稱代詞只能用主格。如：
He is as old as she is.
但是有時用主格或賓格含義差別很大。如：
You love him as much as I (=as I love him). 你愛他像我愛他一樣。
You love him as much as me (=as you love me). 你愛他像愛我一樣。
(2) 在肯定句中用as…as, 在否定句中用not as…as或not so…as 均可。如：
He doesn’t study as [so] hard as his brother. 他學(xué)習(xí)不如他弟弟努力。
(3) 要注意比較對象的一致性，即比較的雙方必須是可以比較的的同類人或物，否則會出錯。如：
正：The population of China is much larger than that of Japan. 中國人口比日本人口多得多。
誤：The population of China is much larger than Japan.
(此句錯在將 the population of China 與 Japan 來比較，比較對象不一致)
(4) 如果涉及數(shù)量或程度，可用以下兩個結(jié)構(gòu)。如：
�、賏s much+ (不可數(shù)名詞+) as
�、赼s many+ (可數(shù)名詞復(fù)數(shù)+) as
You must speak English as much as possible. 你必須盡可能地多說英語。
You’ve made as many mistakes as I have. 你犯的錯誤和我犯的一樣多。
(5) 請注意下列結(jié)構(gòu)的詞序。如：
她和她媽媽一樣是位好廚師。
正：She is a cook as good as her mother.
正：She is as good a cook as her mother.
誤：She is as a good cook as her mother.
(6) 修飾as…as結(jié)構(gòu)的常見詞語有nearly, almost, just, exactly, half, quite, twice, three times等，請注意這些修飾語都只能放在as…as 結(jié)構(gòu)之前 (而不能置于其中或其后。如：
This rope is twice aslong as that one. 這根繩子比那根長一倍。
(7) as…as結(jié)構(gòu)的下列用法，屬于“異質(zhì)比較” (注：主、從句的主語和謂語一致時，從句的主語和謂語有時可以省略)。如：
The room is aslong as (it is) wide. 這房間的長寬尺寸一樣。
The news was asunexpected as (it was) welcome. 這消息來得突然，但受人歡迎。
She is as clever as (she is) beautiful. 她既聰明又漂亮。
Oneis as light as the other is heavy. 一個輕，另一個重。
(8) as…as結(jié)構(gòu)在一定的上下文中可以用其省略結(jié)構(gòu) (即省去其中的一個 as)。如：
She’s clever, but her brother is just as clever. 她很聰明，但她兄弟也一樣聰明。
The woman married a man pooras herself. 這個女人嫁給了一個與她一樣窮的男人。
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拓展：with的用法總結(jié)
一、with結(jié)構(gòu)作定語，修飾前面的名詞(可以是緊跟的名詞，也可以是不緊跟的名詞，)作定語，帶有.....的特征。
1、 with結(jié)構(gòu)修飾名詞，with作后置定語，不緊跟前面名詞的情況。
例，Bihar is India's poorest state, with an annual per capita income of $111, lower than that of the mostimpoverished countries of the world.
with結(jié)構(gòu)修飾Bihar
2、with結(jié)構(gòu)修飾名詞，緊跟名詞的情況。
例，Under the restructuring, the huge organization that operates the company's basic businesses will be divided into
five groups, each with its own executive.with結(jié)構(gòu)修飾each (group)
二、作原因狀語，解釋為，由于，因為。
例，With total sales of less than three hundred dollars and fewer new subscribers than last year, the New England
Theatre Company is in danger of losing its building.
三、作伴隨或結(jié)果狀語，表示伴隨的情況或結(jié)果。
1、with作伴隨狀語
曼哈頓論壇Ron對with作伴隨狀語的解釋：
It appears that "with" may be used with a present participle (-ING form) to represent
circumstances that are contemporaneous with the action described in the main clause
大意是，with引導(dǎo)的狀語，與主句動詞動作同時發(fā)生。
四、【表示使用的工具，手段】用，以，借，在……的幫助下。語法作用：修飾動詞。
with解釋為，在……的幫助下。修飾動詞producing
Dolphins lack vocal cords, but they do create sounds, producing a complicated system of whistles, squeaks, moans, trills and clicks with sphincter muscles inside the blowhole.
海豚缺少聲帶。但是它們確實能產(chǎn)生聲音，在噴水孔內(nèi)部的括約肌的幫助下，產(chǎn)生一系列復(fù)雜的由汽笛聲，吱吱聲，呻吟聲，顫音，和咔噠聲組成的復(fù)雜聲音系統(tǒng)。
with解釋為，用……，修飾動詞portray
George Sand was one of the first European writers to consider the rural poor
legitimate subjects for literature and to portray them with sympathy and respect in her novels.
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