下面是小编整理的六级英语等级考试知识点总结大全，希望能帮助到大家。

六级英语等级考试知识点总结大全

特殊的虚拟语气词——should

1）It is demanded/necessary/a pity+that…结构中的主语从句的谓语动词要用should加动词原形，should可省略。

句型：

(1)suggested

(2)It is　important　that…+(should)do

(3)a pity

(1)suggested,ordered,proposed,required,demanded,requested,insisted；+(should)do

(2)important,necessary,natural,strange，a pity,a shame,no wonder

(3)It is suggested that we(should)hold a meeting next week.

It is necessary that he(should)come to our meeting tomorrow.

2）在宾语从句中的应用

在表示命令、建议、要求等一类动词后面的从句中。order,suggest,propose,require,demand,request,insist,command,insist+(should)do

I suggest that we(should)hold a meeting next week.

He insisted that he(should)be sent there.

注意：如suggest,insist不表示"建议"或"坚持要某人做某事时"，即它们用于其本意"暗示、表明"、"坚持认为"时，宾语从句用陈述语气。

The guard at gate insisted that everybody obey the rules.

判断改错:

（错）You pale face suggests that you(should)be ill.

(对)Your pale face suggests that you are ill.

(错)I insisted that you(should)be wrong.

(对)I insisted that you were wrong.

3）在表语从句，同位语从句中的应用

在suggestion,proposal,idea,plan,order,advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。

My idea is that we(should)get more people to attend the conference.

I make a proposal that we(should)hold a meeting next week.

一般现在时代替完成时

1)有些动词用一般现在时代替完成时：

hear,tell,learn,write,understand,forget,know,find,say,remember.

I hear(=have heard)he will go to London.

I forget(=have forgotten)how old he is.

2)句型"It is…since…"代替"It has been…since…"

3)It is(=has been)five years since we last met

不定式的特殊句型so as to

1）表示目的；它的否定式是so as not to do。

Tom kept quiet about the accident so as not to lose his job.

汤姆对事故保持沉默是为了不丢掉他的工作。

Go in quietly so as not to wake the baby.

轻点进去，别惊醒了婴儿。