为什么这一题的答案不是与and后的时态一致用were being cut Rainforests _(在砍伐)and burned at such a speed that they will disappear in the near future.(cut) 答案是are being cut

问题描述:

为什么这一题的答案不是与and后的时态一致用were being cut
Rainforests _(在砍伐)and burned at such a speed that they will disappear in the near future.(cut) 答案是are being cut

此句中的谓语就是系动词are ,burned 和being cut中的cut构成并列,表被动,并非过去式。
反证法:如若是过去式,rainforest(雨林)和burned就构成了主动式了,问题是rainforest(雨林)是不能主动烧自己的,只能是被烧。
因此,burned与cut并列,共用are being 构成被动式

因为rainforest和cut之间是被动关系,所以必须用被动语态!
and后面之的burned不是过去式,而是过去分词

are being cut and are being burned,
这是两个并列谓语,省去相同成分.
热带雨林正在被 以如此的速度 砍伐、烧毁,
他们在不久的将来将会消失.
现在进行时被动语态.

可以把答案和题干分rainforests are being cut and are being burned,由于谓语的are being 是一样的,所以burned 前省略了。