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四级英语语法基础知识大全？【篇一】2020年12月大学英语四级语法知识合集 限制性和非限制性定语从句 1) 定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确;非限制性定语从句是先行词的附加说明，那么，四级英语语法基础知识大全？一起来了解一下吧。
英语四级单词5000汇总电子版
【 #四六级考试#导语】备考是一种经历，也是一种体验。每天进步一点点，基础扎实一点点，通过考试就会更容易一点点。 考 网！
【篇一】2020年12月大学英语四级重点语法知识
英语四级重点语法知识：条件状语从句
连接词主要有 if, unless, as/so long as, on condition that 等。.
if 引导的条件句有真实条件句和非真实条件句两种。做物非真实条件句已在虚拟语气中阐述。
unless = if not.
Let's go out for a walk unless you are too tired.
If you are not too tied, let's go out for a walk.
典型例题
You will be late ___ you leave immediately.
A. unless B. until C. ifD. or
答案A。 句意：除非你立即走，否则你就回迟到的。可转化为 If you dong leave immediately, you will be late.B、差胡虚D句意不对，or表转折，句子如为 You leave immediately or you will be late.
【篇二】2020年12月大学英语四级重点语法知识
英语四级重点语法知识：让步状语从句
though, although
注意： 当有though, although时，后面的从句不能有but，但是 though 和yet可连用
Although it's raining, they are still working in the field.
虽然在下雨，但他们仍在地里干活。
英语四级语法百度网盘
说实在的，英语四链迅宴级、六级和高中英语的区别不在语法上，而在词汇量和阅读能力上，只要高中英语课上所学过的所有语法知识都会了，并且四级的昌型单词都会了，阅读速度快，过四级很轻棚银松，说不定还会得高分呢！
4级语法
其实如果你在准腔空备四六级 你会发现其实整个卷早段子都是阅读 包括听力如果在语法上面过多追究 对考试不是太好！！祝你伍睁瞎四级成功！
英语四级词汇语法
原发布者:超级沉册斗默的凯姿宽小白
四级语法一：时态：所谓的"时态"，就是时间+状态。谓语动词的时态见下表：1．主动形式2．被动形式CET-4常考的三种时态：过去完成时；将来完成时；（现在/过去）完成进行时。时间状语从句当中的时态：一般过去时所有的过去用一般现在时表示现在和将来现在完成时现在完成和将来完成一．非谓语动词一．不定式：一）不定式的常考形式：1)一般形式：Hedecidedtoworkharderinordertocatchupwiththeothers.被动形式:Hepreferredtobeassignedsomeheavierworktodo.语法功能：表示与谓语动词同步发生2)完成形式：Hepretendednottohaveseenme.被动形式：Thebookissaidtohavebeentranslatedintomanylanguages.语法功能：表示发生在谓语动词之前二）不定式常考的考点：1）不定式做定语----将要发生2）不定式做状语----目的3）不定式充当名词功能---Toseeistobelieve.三)不定式的省略1)感官动词see,watch,observe,notice,lookat,hear,listento,smell,taste,feel+do表示动作的完整性，真实性；+doing表示动作的连续性盯亮，进行性Isawhimworkinthegardenyesterday.昨天我看见他在花园里干活了。
四级语法考什么
Ⅰ动词(时态,语态,用法,省略,一致性等)
时
1)现在完成进行时态 (have/has been + -ing 分词构成): 动作或状态从过去某时开始,继续到现在,可能继续下去,也可能刚刚结束.
I’ve been writing letters for an hour.
I’ve been sitting in the garden.
2)过去完成进行时(由had been + ing分词构成): 过去某个时刻以前一直在进行的动作
I’d been working for some time when he called.
We had been waiting for her for two hours by the time she came.
3)将来完成进行时: 将来某个时刻以前一直在进行的动作.
By next summer, he will have been working here for twenty years.
In another month’s time she’ll have been studying here for three years.
4)将来完成时(由shall/will have + 过去分词构成): 将来某时会业已发生的事.
I shall have finished this one before lunch.
They’ll have hit the year’s target by the end of October.
1. 语态
1) 可以有两种被动结构的类型,例如:
He was said to be jealous of her success.
It was said that he was jealous of her success.
能早信同时适用于上述两个句型的主动词通常都是表示“估计”,“相枣耐信”等意义的动词,常见的有assume,believe,expect,fear,feel,know,presume,report,say,suppose,understand等.
It is supposed that the ship has been sunk.
The ship is supposed to have been sunk.
担当be supposed to 与不定式的一般形式搭配时往往表示不同的意义.例如:
Why are you driving so fast in this area? You are supposed to know the speed to know the speed limit. (你应该晓得速度限制)
2) 双宾语及宾补结构的被动语态
a) 双宾语结构的被凳睁春动语态: 双宾语结构变为被动语态时,可以把主动结构中的一个宾语变为主语,另一个宾语仍然保留在谓语后面,但多数是把间接宾语变为主语.
He was asked a number of questions at the press conference.
Two days were allowed them for making the necessary preparations.
b) 宾补结构的被动语态:
She was called Big Sister by everybody.
Then he was made a squad leader.
He was considered quite qualified for the job.
The room was always kept clean and tidy.
2. 短语动词
1) Vi + adv
The plane took off two hours late.
2) Vi + prep
They looked round the Cathedral.
3) Vi + prep (有被动语态)
She’s looking after her sister’s children.
The children were always well looked after.
4) Vi + adv + prep
I began to look forward to their visits.
5) Vt + O + adv
Some women choose to stay at home and bring up their children.
The children were brought up by their mother.
They took him on.
6) Vt + adv + O (无被动语态)
I am trying to give up smoking.
7) Vt + O + prep
We talked Donald into agreement.
3. 省略
1) 在以as, than, when, if, unless等引导的从句中的省略: 在有些状语从句中,如果谓语包含有动词be,主语又和主句的主语一致a),或者主语是it b),就常常可以把从句中的主语和谓语的一部分(特别是动词be)省略掉.
a) Look out for cars when crossing the street.
When taken according to the directions, the drug has no side effects.
While there he joined in voluntary labour on a project.
Although not yet six months old, she was able to walk without support.
If not well managed, irrigation can be harmful.
Though reduced in numbers, they gained in fighting capacity.
This viewpoint, however understandable, is wrong.
Enemies, once discovered, were tightly encircled and completely wiped out.
She hurriedly left the room as though/if angry.
She worked extremely hard though still rather poor in health.
Fill in the application as instructed.
Whenever known, such facts should be reported.
The documents will be returned as soon as signed.
He said that no acrobat could ever perform those daring feats unless trained very young.
Once having made a promise, you should keep it.
b) If necessary I’ll have the letter duplicated.
Fill in the blanks with articles where(ver) necessary.
If possible, I should like to have two copies of it.
As scheduled, they met on January 20 at the Chinese Embassy.
2） 在以than a) 或 as b) 引起的从句中,常会有一些成分省略.
a) He told me not to use more material than (it is) necessary.
We should think more of the collective than of ourselves.
b) They worked with as much enthusiasm as young people (did).
He is now a vice-manager, but still often works in the kitchen as before.
Their training is free, as is all education.
We will, as always, stand on your side.
3） 错误的省略
His life is as fully committed to books as anyone I know.
While standing there in her nightgown, two bullets struck the wall beside her.
以上就是四级英语语法基础知识大全的全部内容，一、主语从句：1、it is +adj\ that + 虚拟 2、it is +done(表示建议、要求)that + 虚拟 二、宾语从句：1、I suggest(表示命令;建议;请求) that shoule +do (在虚拟语气中，内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
