as的倒裝句的用法有哪些(2)
as用作連詞引導時間狀語從句
as與when,while都是引導時間狀語從句的從屬連詞,含義都是"當……的時候".但它們有區(qū)別：用when時,從句的動作可以與主句的動作同時發(fā)生,也可以先于主句的動作發(fā)生;用while時,從句的動作為一過程,主句動作與從句動作同時進行或在從句動作過程中發(fā)生;用as時,主句和從句的動作同時發(fā)生,具有延續(xù)的含義.例如：
(1)It was snowing when he arrived at the
construction site.他到達工地時,天正在下雪.
(2)He was watching TV while his mother
was cooking.他母親做飯時他在看電視.
(3) You will grow wiser as you grow
older.你會隨著年齡的增長而越來越聰明.
3. as用作連詞引導原因狀語從句
as,because,since都可以表示因果關系,連接原因狀語從句,含義是"因為,由于",但它們有區(qū)別：because表示的語氣最強;as一般放在句首,語氣較弱,較口語化;since常常用在書面語中,表示多為對方已知的、或稍加分析便可得知的原因,有時可譯作"既然".例如：
(1) He will succeed because he is in
earnest.他一定會成功,因為他很認真.
(2) Since you are so sure of it he”ll
believe you.既然你對此如此有把握,他會相信你的.
(3) As rain has fallen, the air is
cooler.因為下過雨,空氣比較清爽.
4. as作連詞引導讓步狀語從句
as與although (或though),however (或no matter how)等都可以引導讓步狀語從句,含義是"雖然,盡管",但它們有區(qū)別：although語氣稍正式些,可放在句首,也可放在句中,主句中不能再用but,但可以用yet;as所表示的語氣較強,引導的讓步狀語從句用倒裝語序;however引導讓步狀語從句時,它的后面可跟形容詞或副詞,也要用倒裝語序.例如：
(1) Although he is quite old, he still
jogs every day.他雖然年紀相當大,仍然每天慢跑.
(2) Strange as it may seem, nobody was
injured in the accident.這次意外雖然顯得令人不可思議,卻沒有人受傷.
(3) However hard he may try, he will not
attain his goal.無論他怎樣努力也達不到目標.
as作關系代詞的用法
關系代詞as引導定語從句時,既可以單獨使用,也可以與其他詞連用,其用法要比that和which更為復雜.
1. as引導定語從句與其他詞連用
①用于the same...as結構中
This is the same book as I read last
week.這本書和我上周讀的那本是一樣的.
?、谟糜趕uch...as結構中
I don”t like such books as he
recommends.我不喜歡他推薦的那些書.
?、塾糜?quot;so +adj. + a/an + n. (單數) + as "結構中
I am not so strong a man as I
was.我已經沒有從前那么強壯了.
2. as單獨引導定語從句
as單獨引導定語從句時,先行詞可以是一個詞,也可以是一個句子或短語.例如：
(1) She is late, as is often the
case.她遲到了,這是經常的事.(先行詞是整個主句)
(2) To shut your eyes to facts, as many
of you do, is foolish.對事實視而不見--你們好多人都是如此的愚蠢.(先行詞是不定式短語)
as作介詞的用法
as作介詞,意思是"作為","以……身份".例如：
He came to China as a tourist five years
ago.他五年前以游客的身份來過中國.
as作副詞的用法
to the same degree or amount; equally
"相同地","同樣地".例如：
They don”t have as many
airplanes.他們沒有同樣多的飛機.
not as.as 不如,不及
句型：A+v.(包括be動詞和行為動詞)+not as +形容詞和副詞的原級+as+B(A和B指人)
I'm not as tall as you. 我比你矮;我沒有你高
Jack doesn‘t run as fast as Tom.杰克比湯姆跑得慢;杰克沒有湯姆跑得快
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2.as的用法