as引導(dǎo)的五種狀語從句.doc

as引導(dǎo)的五種狀語從句as作從屬連詞用時,可以引導(dǎo)五種狀語從句。現(xiàn)歸納如下：1. as表示“當(dāng)?shù)臅r候”,引導(dǎo)時間狀語從句,多強調(diào)主句和從句中的動作或狀態(tài)同時發(fā)生,從句可放在主句前,也可放在主句后。例如：As I waited at the stop, I heard a big noise. 當(dāng)我在車站等車的時候,我聽到一個很大的聲響。She rose up as he entered. 當(dāng)他進來時,她站了起來。2. as表示“因為”、“由于”,引導(dǎo)原因狀語從句,其語氣不如because強,通常為附加說明的理由,且是已知曉的原因,主句與從句沒有邏輯上的因果關(guān)系。例如：As she was not well, I went there alone. 因為她身體不好,所以我獨自到那里去了。As he is a tailor, he knows what to do with this material. 由于他是個裁縫,他知道怎樣利用這塊布料。3. as表示“雖然但是”,引導(dǎo)讓步狀語從句,從句通常用倒裝語序,把從句的表語、狀語或動詞原形放在as前面,可以用though替代。例如：Child as he is, he knows a lot. 雖然他是個孩子,但他知道的東西很多。Hard as it was raining, they went on working in the field. 雖然天下大雨,但他們繼續(xù)在田地里干活。4. as表示“按照”、“依照”、“像”,引導(dǎo)方式狀語從句,從句置于主句之后。例如：You should do as the teacher tells you.你應(yīng)當(dāng)依照老師所說的去做。The absence of air also explains why the stars do not seem to twinkle in space as they do from the earth. 空氣的不存在,也說明了為什么在空中星星看來并不閃爍,而不像從地球上看的那樣。5. as表示“像一樣”,引導(dǎo)比較狀語從句,對主句和從句的動作或狀態(tài)加以比較,說明它們之間有相似之處,在從句中常省略與主句相同的部分。例如：He doesnt work as hard as I (do). 他不像我工作那樣努力。I hope the necklace was as good as the one you lent me.我希望我掛項鏈同你借給我的一樣好。連詞as引導(dǎo)的狀語從句Proud as these nobles are,he is afraid to see me.在這個句子中，as是一個連詞，引導(dǎo)讓步狀語從句。與常見的讓步從句不同的是，這個狀語從句的結(jié)構(gòu)有點特殊；表語放在了句首。作為連詞，as極其活躍，能引導(dǎo)多種狀語從句，本文擬將這一用法作一歸納。、引導(dǎo)時間狀語從句As you study a globe,you may notice that most of the large landareas are connected,or almost so.(高一冊，第267頁)As the steam expands,the temperature falls.當(dāng)水蒸汽膨脹時，溫度就下降。Just as I was backing out,my sleeve caught on the corner of a trayof diamonds.(高三冊，第225頁)、引導(dǎo)原因狀語從句As Li Ping was not well,I went there myself.(高一冊,第96頁)As water is a good solvent,pure water is never met with in nature.因為水是一種很好的溶劑，所以在自然界從未遇見過純水。as引導(dǎo)的原因狀語從句也可以采用倒裝結(jié)構(gòu)，如：Tired as he was,he want to bed at once.他因為很累，所以馬上就去睡了。Michael,fool as he was,completely ruined the dinner.又與邁克爾的愚蠢，這次宴會給攪亂了。Absorbed as he was in a mathematical problem,he did not notice myentering the room.由于他全神貫注在解一道數(shù)學(xué)題，所以沒有注意到我走進房間。But,living as it does in a community of cells,it is notindependent at all.(高二冊，第336頁)Living as we do in a remote village,we have few visitors.由于我們住在一個偏僻的村子里，所以沒有什么來客。、引導(dǎo)讓步狀語從句，其結(jié)構(gòu)如下：1）adj.+as+主語系動詞be，Young as he is,he knows a lot of things.他年齡不大，可知道的事情卻不少。Poor as he was,he was honest.Hard as steel is,it will bend or break under the action of a strongforce.剛雖然很硬，但在強力作用下也會彎曲或斷裂。2）n.+as+主語系動詞be，Child as he is,he knows a lot of things.他雖然是個孩子，可知道的事情卻不少。King as he is,he is unhappy.Expert as he was,he failed.他雖然是專家,但還是失敗了.注意在本句型中，句首的單數(shù)可數(shù)名詞前不用冠詞。試比較下面這個與第一句意義相同的句子：Although he is a child,he knows a lot of things.3）adv.+as+主語+動詞，Much as I like it,I wont buy it.盡管我很喜歡它，但我卻不買。Fast as you read,you cant finish the book in two days.盡管你讀得很快，你也不能在兩天之內(nèi)讀完這本書。4）4）v.(原型)as主語助動詞，Try as you may,you will never succeed.無論我怎樣尋找，也未能發(fā)現(xiàn)他的蹤影。、引導(dǎo)方式狀語從句The absence of air also explains why the stars do not seem totwinkle in space,as they do from the earth.(高二冊，第198頁)太空中沒有空氣，這也說明了為什么在太空星星看來并不閃爍，不想從地球上看到的那樣。Solids expand and contract as liquids and gases do.固體像液體和氣體一樣也會膨脹和收縮。as在引導(dǎo)方式狀語時，前面可以有加強語氣的just：Just as sound is a wave motion,light in the same sense,may beregarded as a wave motion.正如聲音是一種波動一樣，光也同樣可以看作是一種波動。I knew his wife must be praying for him,just as I was praying forJames.我知道他妻子一定在為他祈禱，正如我為詹姆斯祈禱一樣。Electricity flows through a wire ju