一道英语选择题不懂We cannot accurately predict how much carbon dioxide _____by factories will remain permanently in the air.答案是released.为什么不是being released?不是被动语态吗?水讲得详细分给谁

问题描述:

一道英语选择题不懂
We cannot accurately predict how much carbon dioxide _____by factories will remain permanently in the air.
答案是released.为什么不是being released?不是被动语态吗?水讲得详细分给谁

这是个定语从句,省去了that或which,所以也就省去了was。being不能用作系动词。

一个句子只能有一个被动词,前面已经有了,所以后面的要省略

being released是正在进行的被动动作,而题中的动作并没有标明是正在进行的,
released表示两种含义1、被动,2、此动作已经完成

不一样的
这里不能要BE 动词的

be released == Vpp 是被动语态
which is/was 已经省略

后置定语 被释放 being released正在被释放 不符合句意 就相当于which is Released

省去了that或whichbeing不能用作系动词