as 用法歸納總結(jié)
as 用法歸納總結(jié)
下面是小編整理的一些關(guān)于as 用法總結(jié), 希望讓大家更好地認(rèn)識as這個(gè)單詞,提高英語水平。
(一)、As =Since 作"既然"、"由于"解,引導(dǎo)原因狀語從句,常用來表示已為人們所知或顯而易見的原因或理由。
如: As he’s been ill for ages, I will help him.
As / Since you're not feeling well, you may stay at home.
As he wasn't ready , we went without him
2. .as作連詞的用法:
1.作“在-------期間,當(dāng)----的時(shí)候”引導(dǎo)時(shí)間狀語從句.注意與when、 while的用法區(qū)別。
?、傧铝星樾螘r(shí),只用as, 而不用when或while。
1)用于表示同一個(gè)人的兩種動(dòng)作交替進(jìn)行,指一邊----一邊. 如:
The girl sings as she goes to school.
He looked behind occasionally as he went forward in theforest.
2)表示兩個(gè)同步發(fā)生的動(dòng)作或行?意思是隨著-----的發(fā)展.如:
As time went on / by, she became more and more beautiful.
As children get older, they become more and moreinterested in everything.
3)表示兩個(gè)短暫行為或事情幾乎同時(shí)發(fā)生.如:I watched her as she read the book.
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loudcry.
4)接在名詞后面表示某一個(gè)年齡段時(shí).如:
As a young man, he was active in sports.
?、趙hen作"當(dāng)……的時(shí)候"解,可以指較短的(一點(diǎn))時(shí)間,也可指一段時(shí)間。如:When I was at college, I could speak several foreignlanguages. When the clock struck twelve, I had slept for 2hours.
?、?while常表示一段較長的時(shí)間或一個(gè)過程,強(qiáng)調(diào)主句謂語動(dòng)詞與從句謂語動(dòng)詞同時(shí)發(fā)生。如:Work while you work. Play while you play.
3. As =in the way that作"像"、"按照……的方式"解,引導(dǎo)方式狀語從句。如:
Do as I told you.
Remember, you must do everything as I do.
4. 用于as--- as或not / so/ as ----as中,前一個(gè)as是副詞,后一個(gè)as是連詞,引導(dǎo)比較狀語從句。
如:They helped the old as much as possible.
I don't speak English so/ as well as she does.
5. 表示雖然,盡管等,引導(dǎo)讓步狀語從句,常用倒裝語序,模式為:
adj. /adv. / n.+as +主語+謂語+主句。如: Young as he is, he knows much.
Tired as they were, they walked on.
(二)、 as作關(guān)系代詞,引導(dǎo)定語從句,表示正如,這一點(diǎn).如:
He is very careful, as we all know.
As is well-known,Taiwanbelongs toChina.
另外,當(dāng)先行詞被the same, such等詞修飾時(shí),常用as來引導(dǎo)定語從句。如:
Such a clever girl as she can learn anything quickly.
I was reading the same book as he bought yesterday.
(三)、as作介詞的用法.
1.表示好像。如:He dressed as a policeman.
2. 表示作為當(dāng)作。如:I found a job as a guide.
3. 當(dāng)某人是某身份時(shí)。如:As a child , she was sent to abroad.
4. as引導(dǎo)的介詞短語大多用作狀語,as譯為"作為";少數(shù)情況可引起賓語補(bǔ)足語。如:
As a Party member, I'll take the lead in everything. (狀語)
She works as a model. (狀語)
She has me as one of her best friends.(引起賓語補(bǔ)足語)
(四)、as作副詞的用法
1 表示與------等同。如:This dress istwice as expensive as that one. 2 像,如等。如:As before, he remained unmoved.
總之,通過以上的分析,我們對as的詞性和用法有了比較全面的理解和把握,才能在實(shí)際的運(yùn)用中做到心中有數(shù),應(yīng)付裕如。
as...as意為“和……一樣”,表示同級的比較。使用時(shí)要注意第一個(gè)as為副詞,第二個(gè)as為連詞。其基本結(jié)構(gòu)為:as+ adj./ adv. +as。例如:
(1)This film is as interesting as that one.這部電影和那部電影一樣有趣。
(2)Your pen writes as smoothly as mine.你的鋼筆書寫起來和我的一樣流暢。
其否定式為not as/so +adj./ adv. +as。例如:
This dictionary is not as/so useful as you think.這本字典不如你想象的那樣有用。
總結(jié)
1.as…as結(jié)構(gòu)中,要使用形容詞或副詞的原形。
2.as…as結(jié)構(gòu)用于肯定句或否定句,so…as只用于否定句,用來表示“不如……那樣……”。值得注意的是:它表示的內(nèi)容總是前者不如后者。使用副詞表示“不相等”的句型中,“not as/so…as…”中的not要和助動(dòng)詞do,does,did等一起放在行為動(dòng)詞前,來構(gòu)成否定句
3.as…as結(jié)構(gòu)中,若出現(xiàn)名詞,一般將名詞放在as…as中間。若有形容詞作定語修飾單數(shù)可數(shù)名詞,其前的不定冠詞a/an,須放在形容詞之后。
4.as…as結(jié)構(gòu)中如出現(xiàn)表示倍數(shù)的詞,應(yīng)放在as…as結(jié)構(gòu)之前。如:
Our school is four times as large as yours.我們的學(xué)校比你們的學(xué)校要大四倍。
5.as…as結(jié)構(gòu)后接具體數(shù)字時(shí),是表示長、短、高、矮、重、輕等的程度,而不是表示兩者的比較。如:
Some stones weighas much as fifteen tons.有些石頭重達(dá)十五噸。