【编者按】精品学习网小编提供了大学英语四六级考试阅读需掌握的关键句，供考生参考!
要想在英语四六级阅读中取得好的成绩，除了准备足够多的词汇量外，掌握英语关键句显得更为重要，本文总结了72个关键句型供大家参考。
1. It作先行主语和先行宾语的一些句型
She had said what it was necessary to say.
2. 强调句型
It is not who rules us that is important, but how he rules us.
3. "All+抽象名词"或"抽象名词+itself"(very+形容词)
He was all gentleness to her.
4. 利用词汇重复表示强调
A crime is a crime a crime.
5. "something(much)of"和"nothing(little)of""something of"相当于"to some extent"，表示程度。在疑问句或条件从句中，则为"anything of "，可译为"有点"，"略微等。""译为毫无"，"全无"。"much of"译为"大有"，"not much of"可译为"算不上"，"称不上"，"little of"可译为"几乎无"。something like译为"有点像，略似。"
They say that he had no university education, but he seems to be something of a scholar.
6. 同格名词修饰是指of前后的两个名词都指同一个人或物，"of"以及它前面的名词构一个形容词短语，以修饰"of"后面的那个名词。如"her old sharper of a father"，可译为："她那骗子般的父亲"。
Those pigs of girls eat so much.
7. as…as…can(may)be
It is as plain as plain can be.
8. "It is in(with)…as in(with)"
It is in life as in a journey.
9. "as good as…"相等于，就像，几乎如;实际上，其实，实在。
The merchant as good as promised the orphan boy, that he would adopt him.
10."many as well…as"和"might as well …as" "many as well…as"可译为"与其……，不如……，更好"，"以这样做……为宜"，"如同……，也可以……"等等。"might as well …as"表示不可能的事，可译为"犹如……"，"可与……一样荒唐"，"与其那样不如这样的好"等等。
One may as well not know a thing at all as know it imperfectly.
11."to make…of"的译法(使……成为……，把……当作)
I will make a scientist of my son.
12. oo…+不定式"，not(never)too…+不定式"，"too…not+不定式
She is too angry to speak.
13. only(not, all, but, never) too …to do so "和"too ready (apt) + to do"结构中，不定式也没有否定意义，凡是"not"，"all""but等字后+"too…to，"不定式都失去了否定意义，在"too ready(apt) +to do"结构中，不定式也没有否定意义。
You know but too yell to hold your tongue.
14. "no more …than…"句型
A home without love is no more a home than a body without a soul is a man.
15. "not so much…as"和"not so much as …"结构，"not so much…as"="not so much as …"，其中as有进可换用but rather，可译为："与其说是……毋须说是……"。而"not so much as"="without(not)even，"可译为"甚至……还没有"。
The oceans do not so much divide the world as unite it .
16. "Nothing is more…than"和"Nothing is so …as"结构，"Nothing is more…than"和"Nothing is so …as"都具有最高级比较的意思，"Nothing I"可换用"no"，"nobody"，"nowhere"，"little"，"few"，"hardly"，"scarcely"等等，可译为"没有……比……更为"，"像……再没有了"，"最……"等。
Nothing is more precious than time.
17. "cannot…too…"结构,"cannot…too…"意为"It is impossible to overdo…"或者，即"无论怎样……也不算过分"。"not"可换用"hardly"，"scarcely"等，"too"可换用"enough"，"sufficient"等
You cannot be too careful.
18. "否定+but "结构，在否定词后面的"but"，具有"which not"，"who not"，"that not"，等等否定意义，构成前后的双重否定。可译成"没有……不是"或"……都……"等
Nothing is so bad but it might have been worse.
19. "否定+until (till)"结构，在否定词"no"，"not"，"never"，"little"，"few"，"seldom"等的后边所接用的"until/till"，多数情况下译为"直到……才……"，"要……才……"，把否定译为肯定。
Nobody knows what he can do till he has tried.
20. "not so…but"和"not such a …but"结构，这两个结构和"否定+but"的结构差不多，不同之点是这两个结构中的"but"是含有"that…not"意味的连续词，表示程度。可译为"还没有……到不能做……的程度"，"并不是……不……"，"无论怎样……也不是不能……"等。
He is not so sick but he can come to school.
21. "疑问词+should…but "结构，这个结构表示过去的意外的事，意为"none…but"，可译为"除了……还有谁会……"，"岂料"，"想不到……竟是……"等。
Who should write it but himself?
22. "who knows but (that)…"和"who could should…but"结构，这个结构是反问形式，一般意译为"多半"，"亦未可知"等等，有时也可直译。
Who knows but (that) he may go?
23. "祈使句+and"和"祈使句+or"结构，"祈使句+and"表示"If…you…"，"祈使名+or"