1、除了以下几种状态是可以省略的,其他的都不行:
1。在从句中充当宾语
The people(who,whom,that)I saw yesterday were from Japan.
2。在从句中作介词宾语,且介词在句尾
Here is the man (that,who,whom)looking for.
3。在从句中作表语
Shanghai is no longer the city(that,which)it used to be.
4。在There be句型中,作主语的关系代词
There's somebody(who)wants to see you.
5。先行词是表示方式,原因,时间(像way,reason,day),in which,for which,when,that等可省
I don't like the way (that)you talk to me.
I like the place for the reason(that,for which)you dislike it.
2、比较状语从句通常由as或than引起,。这类从句和大多数状语从句不同,它们不修饰动词,而是修饰as,so,less,more等副词,或其他比较级的词,如 taller, harder.在这里讨论它们,不是作为动词修饰语,而是作为一种状语从句。
比较状语从句(adverbial clause of comparison)从某种角度上说,它也是一种方式状语从句,它通常可和以下关联词来引导as(或so)...as, than, according as, in proportion as等。
3、hardly(scarcely) …when… 这个句型,前面部分用过去完成时,后面部分用一般过去时。
例如:
Saddam had hardly realized what was happening when he was captured. = Hardly had Saddam realized what was happening when he was captured. 萨达姆还没有意识到在发生什么事情就被抓获了。
4、so...that 和Such...that区别主要是 so通常后接形容词,such后通常接名词。
5、at是介词,介词后接名词。
at的意思及用法如下:
1.在...地点
They were already waiting at the gate when I got there.
当我到达那里时,他们已等候在门口了。
2.在...时刻
Jane will meet her boy friend at Christmas.
简将在圣诞节和她男友见面。
3.向,朝,对着
Don't shout at me.
别对我叫喊。
4.在...方面
He is an expert at troubleshooting.
他是位排解争端的能手。
5.因为,由于
I woke at the sound of the bell.
随着铃响,我醒了。
6.从事于,忙于
He is working hard at this thesis.
他正在努力地撰写论文。
7.以(某种价格、速度等)
They sold the cloth at a dollar a yard.
他们以每码一元的价格出售这种布
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