1、,知識點 as引導(dǎo)狀語從句,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,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。 1、引導(dǎo)時間狀語從句 As you study a globe, you may notice that most of the large land areas 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

2、 the corner of a tray of diamonds. (高三冊，第225頁),as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,2、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

3、累，所以馬上就去睡了。 Michael, fool as he was, completely ruined the dinner. 由于邁克爾的愚蠢，這次宴會全給攪亂了。,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,Absorbed as he was in a mathematical problem, he did not notice my entering 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 not independent at all

4、. (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。,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,3、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. 他雖然窮，但很誠實。 Hard as steel is, it will bend or break unde

5、r the action of a strong force. 鋼雖然很硬，但在強力作用下也會彎曲或斷裂。,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,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. 他雖然是國王，但還是不開心。 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

6、 child, he knows a lot of things.,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,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）v.(原型)as主語助動詞， Try as you may, you will never succeed. 你盡管可以試，但決不會成功。,as引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,4、引導(dǎo)方

7、式狀語從句 The absence of air also explains why the stars do not seem to twinkle 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，不像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引導(dǎo)狀語從句,【一、引導(dǎo)狀語從句用法】,as在引導(dǎo)方式狀語時，前面可以有加強語氣的just： Just as sound i

8、s a wave motion, light in the same sense, may be regarded 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 for James.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 just as water flows through a pipe. 電通過導(dǎo)線,就像水流過管子一樣。,as引導(dǎo)狀語從句,【一、

9、引導(dǎo)狀語從句用法】,5、比較狀語從句 They produce gases almost as harmful as the gases from factories. (高一冊，第194頁) You know as much about that as I do.,as引導(dǎo)狀語從句,【二、as, while , when引導(dǎo)時間狀語從句的區(qū)別】,as引導(dǎo)的時間狀語從句,可以表達“正當(dāng)”， “一邊一邊”，“隨著”等意思 1.表示某事一發(fā)生，另一事立即發(fā)生。 As the sun rose, the fog disappeared. 2.表示在某事發(fā)生的過程中，另一事發(fā)生。 Just as he

10、 was speaking there was a loud.,as引導(dǎo)狀語從句,【二、as, while , when引導(dǎo)時間狀語從句的區(qū)別】,3.表示兩個動作同時發(fā)生。 Helen sang a song as she washed. 4.表示“隨著.”，常指一個行為是另一個行為的結(jié)果。 5.As she grew older, she became more beautiful.,as引導(dǎo)狀語從句,【二、as, while , when引導(dǎo)時間狀語從句的區(qū)別】,while:持續(xù)性動詞進行時 1.一般或現(xiàn)在情況 I like listening to music while I am do

11、ing homework. 2.將來情況,一般現(xiàn)在時或現(xiàn)在進行時 3.過去情況 I hurt my shoulder while I was doing gym.,as引導(dǎo)狀語從句,【二、as, while , when引導(dǎo)時間狀語從句的區(qū)別】,4.while表示轉(zhuǎn)折“盡管”的意思 When: 當(dāng)?shù)臅r候 When I was young, I went to town myself. When he receives the letter, hell tell us. hardly. . .when . .“一.就.”,as引導(dǎo)狀語從句,【三、練習(xí)題】,1.Its much easier to

12、 make friends _ you have similar interests. A. unless B. when C. even though D. so that 2. Hot _the night air was, we slept deeply because we were so tired after the long journey. A. although B. as C. while D. however 3. I had hardly got to the office _ my wife phoned me to go back home at once. A.

13、when B. than C. until D. after,as引導(dǎo)狀語從句,【三、練習(xí)題】,4._volleyball is her main focus, shes also great at basketball. A. Since B. Once C. Unless D. While 5. One Friday, we were packing to leave for a weekend away _ my daughter heard cries for help. A. after B. while C. since D. when,as引導(dǎo)狀語從句,【三、練習(xí)題】,Keys: 1. B 2.B 3.A 4.D 5.D 解析：1.本題考查狀語從句的連詞。本題可以把四個選項分別放到空處，其中只有選項B能使語意通順，為正確答案；其他三個選項的意思分別是“除非”，“即使”，“以便”，都不合乎句意，排除?！揪湟狻慨?dāng)你們有相似的愛好的時候，交朋友就容易的多。 考查狀語從句。hot是做從句的表語，提前說明從句時倒裝，即as引導(dǎo)的讓步狀語從句中，要將從句中的表語，狀語，或動詞原形提到as之前，故選B。,as引導(dǎo)狀語從句,【三、練習(xí)題】,3.此題較易。只要辨