- 这道题目怎么选？（英语）Itisprettywellunders
- It is pretty well understood _____ controls
the flow of carbon dioxide in and out the
atmosphere today
A that B when C what D how
答案是C，为什么？
- It is pretty well understood _____ controls
the flow of carbon dioxide in and out the
atmosphere today
A that B when C what D how
这道题不可能是 C 选项.因为what如果在这里引导的是宾语从句,那么what在这个从句应做controls的宾语,(control是及物动词,必须有宾语)但是controls已经有the flow of carbon dioxide 做宾语.或者做controls的主语,但是它已经有主语it.
给个例子:I understood what you said. / I know what you need./ I know what hurt you.
这里我们可以发现what是said/need的宾语/是hurt的主语.
我明白你说的what话了.
我知道你需要what什么.
我知道什么伤害了你.(不能是I know what it hurt you.这样很明显从句中有两个主语)
如果改成 I know what you need something.从句中就多出了一个宾语something.所以如果你非要这个something做need 的宾语,就必须要把what去掉.
可以把这个句子简化一下,把修饰成分都去掉/
It is understood how it controls the things(我用the thing来替代原来的宾语the flow of carbon dioxide.这样更容易理解)
How it controls the things is understood.这是句子的原形.通常我们不把过长的名词性短语或从句(做主语时)放在句首,而是用It做形式主语,让句子看起来平衡.
或者不用被动,给个主语就是
people understand how it controls the things.
所以选 D how 对方式提问的疑问词.
它是怎样控制某物的很容易被理解.
或者是 人们很明白它是怎么控制某物的.