什么是表语从句,什么是方式状语从句?请用简练易懂的方式,最好能有例子,虽然很刁难但书上的总不大懂,

什么是表语从句,什么是方式状语从句?请用简练易懂的方式,最好能有例子,虽然很刁难但书上的总不大懂,
什么是表语从句,什么是方式状语从句?
请用简练易懂的方式,最好能有例子,虽然很刁难但书上的总不大懂,

什么是表语从句,什么是方式状语从句?请用简练易懂的方式,最好能有例子,虽然很刁难但书上的总不大懂,
表句从句就是"表句是个句子",同理,宾语从句,定语从句都这样理解.
表语从句放在连系动词之后,充当复合句中的表语/
下面是我找到的材料,参考一下吧.
基本概念
1． 定义：用作表语的从句叫做表语从句.
2． 构成：关联词+简单句
3． 引导表语从句的关联词的种类：
(1) 从属连词that.如：
The trouble is that I have lost his address.麻烦是我把他的地址丢了.
(2) 从属连词whether,as,as if.如：
He looked just as he had looked ten years before.他看起来还与十年前一样.
The question is whether they will be able to help us.问题是他们是否能帮我们.
注：从属连词if一般不用来引导表语从句,但as if却可引导表语从句,如：
All this was over twenty years ago,but it´s as if it was only yesterday.
这都是20多年前的事了,但宛如昨天一样.
能跟表语从句的谓语动词一般为系动词be,seem,look等.如：
It looked as if it was going to rain.看起来天要下雨了.
(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever
连接副词 where,when,how,why.
如：The problem is who we can get to replace her.问题是我们能找到谁去替换她呢.
The question is how he did it.问题是他是如何做此事的.
That was what she did this morning on reaching the attic.那就是她今晨上了阁楼干的.
重点疑难
1． 连词because可引导表语从句.如：
I think it is because you are doing too much.我想这是因为你做得太多.
2． 在一些表示“建议、劝说、命令”的名词后面的表语从句中,谓语动词用虚拟语气.should+动词原形表示,should可省略.如：
My suggestion is that we (should) start early tomorrow.我的建议是我们明天一早就出发.
方式状语从句
方式状语从句通常由as,(just) as…so…,as if,as though引导.
1） as,(just) as…so…引导的方式状语从句通常位于主句后,但在(just) as…so…结构中位于句首,这时as从句带有比喻的含义,意思是"正如…","就像",多用于正式文体,例如：
Always do to the others as you would be done by.
你希望人家怎样待你,你就要怎样待人.
As water is to fish,so air is to man.
我们离不开空气,犹如鱼儿离不开水.
Just as we sweep our rooms,so we should sweep backward ideas from our minds.
正如打扫房屋一样,我们也要扫除我们头脑中落后的东西.
2） as if,as though
两者的意义和用法相同,引出的状语从句谓语多用虚拟语气,表示与事实相反,有时也用陈述语气,表示所说情况是事实或实现的可能性较大.汉译常作"仿佛……似的","好像……似的",例如：
They completely ignore these facts as if (as though) they never existed.
他们完全忽略了这些事实,就仿佛它不存在似的.（与事实相反,谓语用虚拟语气.）
He looks as if (as though) he had been hit by lighting.
他那样子就像被雷击了似的.（与事实相反,谓语用虚拟语气.）
It looks as if the weather may pick up very soon.
看来天气很快就会好起来.（实现的可能性较大,谓语用陈述语气.）
说明：as if / as though也可以引导一个分词短语、不定式短语或无动词短语,例如：
He stared at me as if seeing me for first time.
他目不转睛地看着我,就像第一次看见我似的.
He cleared his throat as if to say something.
他清了清嗓子,像要说什么似的.
The waves dashed on the rocks as if in anger.
波涛冲击着岩石,好像很愤怒.