专四语法考点串讲之七 As 的用法、比较级的用法及隐含比较级.ppt

专四语法考点串讲之七 As 的用法、比较级的用法 及隐含比较级汇总 一、as的用法： 1. 原级比较一般结构 as … as ; not as … as ; the same … as ; Eg: The work is not as difficult as you think. Last year, land values in most parts of the pinelands rose almost as fast as, those outside the pinelands. 2. as引导的非限制性定语从句位置较灵活，可以位于主句前面、中间或后面，一般用逗号与主句隔开，但which所引导的非限制性定语从句只能放在主句之后。as可引导非限制性从句，常带有‘正如’。 As we know, smoking is harmful to one‘s health.As is known, smoking is harmful to one’s health. As是关系代词。例1中的as作know的宾语；例2中，它充当从句的主语，谓语动词know要用被动式。 3. 尽管，虽说(引起让步状语从句) Eg. Intelligent as she was, she had not much insight. 尽管她很聪明，但她没眼力。 4. As much as 达到（和）。。。（一样）的程度 5. as(so) far as 就……而论，据……(引导方式状语从句) 6. So as to 为的是以便 7. Such as to 以致 8. as(so) long as 只要(=only if 引导条件状语从句) 9. as soon as 一…就(引导时间状语从句) 10. as well (as) 也，以及，还；和；不仅(连接并列成分或从句) 二、比较级的用法归纳 1. more than 其含义为: “不仅是， 非常， 十分”等， 用法和意义较多。 more …than 其含义可以是: “与其说……不如说， 不是……而是” 2. no more than仅仅 not more than不超过 a. He has no more than five dollars on him. 他身上仅有5美元。(强调少) b. He has not more than five dollars on him. 他身上带的钱不超过5美元。 (强调数额少于5美元) 3. no more … than　 not more … than a. He is no more diligent than you. 他不勤奋，你也不勤奋。(两人都不勤奋) (含有消极否定的意思) b. He is not more diligent than you. 他没有像你那样勤奋。(两人都勤奋，但你更勤奋) (含有积极、肯定的意思，表示程度上的差异） 4. no less than = as much as 意为：“竟有…之多，多达”强调多 not less than 意为“不少于，至少”，客观地描述 no less … than 前后均为肯定，含有惊奇的感情色彩。可译为：“是…是， 正是， 和 … 一样， 多达，应有…之多” a. His son has read no less than 50 English books. 他的儿子竟然读了50本英文书。(强调多) b. His son has read not less than 50 English books. 他的儿子读了不少于50本英文书。(不强调多或少) C. Her voice is no less sweet than it used to be. 她的歌声和以前一样甜美。 5. hardly more than用来表示“仅仅”。 Eg. The little man was hardly more than one meter fifty high. ·这个小个子男人仅有1.5米高. 6. 在 more … than 结构中， than 有时可看作关系代词，相当于than what… Eg. There ought to be less anxiety over the risk of getting cancer than exists in the public mind today. (Than = than what…) 人们不应该像今天这样担心害怕患上癌症 7. no other than 只有，正是。它常用来加强语气，多用于书面语。 Eg. The murderer turned out