2020年12月大学英语四级答案,2020年12月大学英语四级语法知识复习

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【篇一】2020年12月大学英语四级语法知识复习

　　英语四级重点语法知识：地点状语从句

　　状语从句的考点为：

　　1、非if引导的条件状语从句，此类句子多用at times，provided，so long as，in case，once等来替代if;

　　2、由even if/so，now that，for all等引导的让步状语从句;

　　just/hardly...when引导的时间状语从句;more than，as...as，not so much as，the same as，as much as等引导的比较状语从句。

　　3、独立主格结构多以逻辑主语+分词的形式出现。

　　4、情态动词多与完成时形式连用。

　　5、定语从句重点考查介词+关系代词(which)和as作为关系代词。

　　状语从句

　　状语从句：两个独立的句子中间用一些含义不同的连接词连接;状语从句用来表达两个句子之间的逻辑关系;分成原因状语、条件状语、结果状语、时间状语、地点状语、让步状语、目的状语、比较状语、方式状语等九大类型;

　　eg：I got up late.

　　I was late for school.

　　Because I got up late, I was late for school. (原因状语从句)

　　I got up late，so I was late for school. (结果状语从句)

　　地点状语：

　　地点状语从句通常由where，wherever，everywhere 引导;

　　eg：Where I live there are plenty of trees.

　　Wherever you work, you will gain much valuable experience as long as you are willing to work.

　　Wherever=no matter where

　　Everywhere they went, they were warmly received.

　　Where there is a will, there is a way.

　　where：不能翻译成在……地方时，通常翻译为如果，表示在……条件下;

　　eg: Where you are confident，you will succeed.

　　eg：Where previously the bank had concentrated on the big infrastructure projects , such as dams, roads and bridges，it begin to switch to projects which directly improved the basic services of a country.

　　concentrated on ：集中于……

【篇二】2020年12月大学英语四级语法知识复习

　　as, which 非限定性定语从句

　　as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：

　　(1) as 引导的定语从句可置于句首，而which不可。

　　(2) as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词;若为行为动词，则从句中的关系代词只能用which.。

　　在本题中，prevent由于是行为动词，所以正确选项应为B。

　　As 的用法

　　例1. the same… as;such…as 中的as 是一种固定结构, 和……一样……。

　　I have got into the same trouble as he (has).

　　例2. 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 know, 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。

【篇三】2020年12月大学英语四级语法知识复习

　　英语四级重点语法知识：方式状语从句

　　方式状语从句通常由as，as if，as though，the way，what引导;

　　eg：Always do to the others as you would be done by.

　　When enter rome do as the romans do.

　　(1)as从句带有比喻的含义，意思是"正如…"，"就像";

　　(2)as if/though："仿佛……似的"，"好像……似的";

　　有时用虚拟语气，有时不用;

　　eg：They completely ignore these facts as if (as though) they never existed. (与事实相反，谓语用虚拟语气。)

　　He looks as if (as though) he had been hit by lighting.

　　(与事实相反，谓语用虚拟语气。)

　　It looks as if the weather may pick up very soon.

　　(实现的可能性较大，谓语用陈述语气。)

　　(3)the way：可以连接两个句子，表达就像……一样;

　　eg：I should do the job the way my father did.

　　Many Europeans now apparently view the US. the way many Americans view Mexican as a cheap place to vacation, shop and party.

　　(4)what：就像，犹如;

　　eg：Air is to man what/as water is to fish.

　　句型：A is to B what C is to D.

　　eg：A1 Gore calls global warming an "inconvenient truth," as if merely recognizing it could put us on a path to a solution.

　　put sb. on a path to a solution：找到解决的办法

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