AS的用法小結(jié)PPT課件

1、2022-5-23AS專題復習專題復習專升本學習江威威第1頁/共12頁asas一詞在高中課本中，看起來簡單，但用法很多，經(jīng)常出現(xiàn)，而又不易掌握。主要表現(xiàn)在詞性多，詞義廣，用法靈活?，F(xiàn)將其用法歸納如下：. as 作副詞，表示程度，意為“同樣地”。在“asas”, “not asas”結(jié)構(gòu)中的第一個as是副詞，作“和/與(不)一樣”解。Jack is as tall as his father. He doesnt speak English as/so fluently as you.第2頁/共12頁. As作連詞，主要引導以下狀語從句：1. 引導時間狀語從句。與while意義相近，強調(diào)兩個動作

2、同時發(fā)生；或某事一發(fā)生，另一事立刻發(fā)生。e.g He shouted aloud as he ran along. I was startled as he opened the door. We get wiser as we get older.2. 引導原因狀語從句，與because的用法相近。 As it was getting very late, we soon turned back. We must stop writing now, as I have rather a lot of work to do. 第3頁/共12頁3. 引導方式狀語從句，作“正如，好象，按照”解。主

3、要的句式有as if(as though);just as;just asas When at Rome, do as Romans do. We do farm work as the old peasant teaches us. When a pencil is partly in a glass of water, it looks as if it were broken. As(it is)in your country, we grow wheat in the north and rice in the south. 正如(像) 你們國家一樣， 。 4. 引導條件狀語從句。主要

4、句式有： as long as /so long as 只要 第4頁/共12頁 As long as you study hard, you will make great progress.5. 引導讓步狀語從句；作“雖然，盡管”解。這時從句常用倒狀語序，即把從句中的表語,狀語或動詞原形放在as之前。 Child as she is, she knows a lot. Though she is a child, she knows a lot. Busy as he is, he insists on studying. Though he is busy, he . Try as he

5、might, Tom could not get out of the difficulties. Though he might try, Tom could not get out of the difficulties.第5頁/共12頁. As作關(guān)系代詞1.引導限制性定語從句，用在“such as”, “the same as/the same as”等結(jié)構(gòu)中，常譯作“像一樣的人或物”，“凡是的人或物”。 He wished to be such a man as Lei Feng was.My bike is the same as yours.2. 引導非限制性定語從句，用來指代它前

6、面的整個句子(即先行句)，意思是“這一點”。這個分句可以放在句首，句中，或句末。This elephant is like a snake, as anybody can see.第6頁/共12頁As is well known, oceans cover more than 70% of the earth.3.若非限制性定語從句位于句首，句中或句末， 則用as來引導。e.g As we expected, he completed his task with great success. The compass was invented in China, as we know now.4

7、. 若非限制性定語從句中的謂語動詞是 be said be known,be expected, be reported , be announced等結(jié)構(gòu)時，不論是在句首，句中， 句末，都必須as用來引導As is known to us, Taiwan is a part of China.第7頁/共12頁. As作介詞1. 作 “如，像”解。 They got united as one man. She spoke of me as her closed friend.2. 作“充當，作為”解。 As a writer, he was famous. English is spoken

8、 as the first language be most people in Australia.3. As作為介詞，常和以下動詞連用。regardas/be known as/consideras useas/ describeas/be remembered as work as/ act as/be honored as/ We regard the sun as the source of most forms of energy.第8頁/共12頁. 含as的固定詞組1.as soon as引導時間狀語從句。 So/as far as I know在句中作插入語。意思是“據(jù)我所知”

9、。As/So far as I know, he will come here next Monday. As well as并列連接詞組，意思是：“和， 同”。當其連接兩個并列主語時，謂語動詞應(yīng)與前面的主語在數(shù)上保持一致。也可以和短 語not onlybut also進行替換。 2.My parents as well as my elder sister enjoy music. 試比較下面句子。My elder sister as well as my parents enjoys music.第9頁/共12頁Tom studies Japanese as well as Chinese

10、.Tom studies not only Chinese but also Japanese. as well譯為“也，還”經(jīng)常放在句尾。與too, also同義詞。3.Come here early, and bring your brother as well.So as to do sth./soas to do sth.引導 目地或結(jié)果狀語。4.He studies hard so as to pass the exam. He was so strong as to carry the heavy box.5.such as意為“例如，諸如”可用來引入同位語，舉一例或數(shù)例說明它與之

11、同位詞的詞 所含的具體內(nèi)容。第10頁/共12頁There are different forms of energy, such as heat energy,light energy, sound energy and etc.6.as to(=as for/as regards)關(guān)于，至于 as much as/as many as “ 多達，達到 至多” There is no doubt as to his honesty. He can earn as much as 500 dollars a day.7.as a result/as a result of(由于的結(jié)果) as a whole(就整體來說)/as fol