2010年12月大学英语四六级考试必备语法精要

　　4) 比较状语从句

　　比较状语从句主要由以下连词引导：(not) as … as, (not) the same as, (not) such … as, not so … as, than, the + 比较级…, the +比较级…等。

　　We have had a lot more rainfall this year than we had last year.

　　She can speak English as fluently as her teacher (can).

　　Ⅲ 宾语从句

　　1) 及物动词后的宾语从句

　　有些动词的宾语从句前还可有一个间接宾语。

　　I remember that we have learned this word before.

　　I don’t understand what you have said.

　　She asked the teacher how she could learn English well.

　　2) 介词的宾语从句

　　It depends on whether you want to do it or not

　　There is disagreement among economists about what money is and how money is measured.

　　Note: 在介词in后面跟that引导的宾语从句中，in that可看成是一个固定的搭配，表示“因为”或“在…方面”。

　　The evidence is invalid in that it was obtained through illegal means.

　　A turtle differs from all other reptiles in that it has its body encased in a protective shell of its own.

　　其他

　　1.　常考的几种倒装结构

　　1) 当表示否定或基本否定的词或词组位于句首作状语时用倒装。这类词或词组常用的有：never, nowhere, seldom, rarely, little, hardly, scarcely, barely, not until, not only, by no means, in no time, under no circumstances, under no condition, in no way, in no case, at no time, on no account等。

　　Never have I heard it before.

　　Nowhere can I find my lost watch.

　　Under no circumstance should a student cheat in the exam.

　　Not only was Churchill a statesman, but also a poet.

　　Note: 当 “no sooner … than”和“hardly/scarcely … when/before”位于句首时用倒装。该结构表示“一…就…”，在时态上主句一般用过去完成时，when或than引导的从句用一般过去时。

　　Hardly/Scarcely had I got home when/before the bell rang.

　　No sooner had the performance begun than the lights went out.

　　2) 当here, there, then, thus, only, hence, little等副词位于句首，句中主、谓用倒装。

　　Here is the book for you.

　　There goes the bell.

　　Then came the order to take off.

　　Thus arose the division between the developed and developing countries.

　　3) 当 “so/such … that”结构中的so或such 位于句首时用倒装。

　　So cold was it at night that I could hardly fall asleep.

　　Such was the force of explosion that all the windows were broken.