考点语法第八讲.pptVIP

四六级备考语法 第八讲计和as的用法及其它考点  ·1.计的用法 (1)先行词i作主语和宾语 ①作形式主语。真正的主语是不定式、 动名词或从句。 eg. It appears that they have been waiting for a long time  ②作形式宾语。计放在谓语动词和宾语之间, 真正的宾语是不定式、动名词或从句。 eg. She thinks it no use telling me ·(2)构成强调句型:Itis/was+被强调的部分 +tha/Who+句子的其它部分 eg. It was only by constant practice that ou can le arn a lang uage  as的用法 (1)用作从属连词 ①引导时间和原因状语从句 eg We took notes as we listened to the radio As it was such a fine day, we decided to go out for a walk ·②引导比较状语从句,常以as.as, not so.as等形式 出现。 eg. Sound travels not so fast as light  ③引导方式状语从句 eg. At Rome we must do as the Roman do It is not difficult to learn English, as(it)is generally supposed 4引导让步状语从句时,通常用倒装,从句中的表语 或沃语位子句音 eg, young as he is, he holds a responsible position In his firm Child as he was, he knew what was the right thing ·注:名词放在句首时,名词前的冠词应省略。  (2)用作关系代词,引导定语从句 ·①与 the same,such连用,引导限制性定语从句。 eg. I would like to use the same instrument as is used in your worksh 代替整个主句,引导非限制性定语从句。常见的结 as has been said before, as may be imagined as is well known as we all can see, as often he ppens, as is often the case, as is reported in eg. As we know, the earth is revolving round the the newspaper as has been alread ointed o叶t等 sun  (3)引导表语从句 eg. It is just as you describe (4)用作插入语 eg. The difference, as i see it, is one of method and not of principle ·(5)用作介词。常见的结构为:动词+名词+as,如 consider.as, look on. as, regard. as, describeas think of.as,veW.as等。 eg. We consider him as a great man  As固定搭配 asif/+ hough好像 as/ so long as只要 such as诸如 之类的 as apposed to与…相反 as for/to至于;关于 soas(no+)to以便/以免;以致 not so much as连…都不;与其…不如 as above如上;同上 as against与…相比 asof/from自从  as much as多达;到.程度 aswe!(as)也/又 el.. as not反正都行/一样 it is/as the 事实上;实际上 It were仿佛,好像,可以说 as yet到现在/那时为止 as any不亚于 as. as ever永远;至今;自古;空前 as.as.. can be极其;到了.的程度 He is as brilliant a politician as ever lived 他是至今最卓越的政治家。  英语成语同固定的介词结构一样也是约定俗成的。然 而,与介词短语又有所不同,它们可以由各种词语组 成。英语成语在英语语言中有其独特的表达意义,因 此