法国电影狂怒:it is crucial that those new plants be environmentally sound.主句中为什么动词用了原形?

来源：百度文库编辑：神马品牌网时间：2024/05/12 16:05:06

If we are ever going to protect the atmosphere, it is crucial that those new plants be environmentally sound.

这是一个典型的虚拟语气。当句子中有crucial, important, necessary等形容词做表语时，后面that引导的主语从句要用虚拟语气，形式是（should）+动词原型，should可以省略掉。

省略了should，虚拟语气

当it作形式主语，后面用形容词作表语，即在it is + adj.这样的句型中，当描述主语的表语形容词是advisable, critical，crucial, desirable, essential, imperative, important, incredible, inevitable, necessary, recommend, strange, urgent等形容词时，主语从句的谓语动词多用虚拟语气，如果是现在时，谓语动词用should/would +动词原形(should/would经常省略)；如果是过去时，则用should/would + have done的形式。

it is crucial that those new plants be environmentally sound.主句中为什么动词用了原形? what is it that makesJoe angry? it is what she can`t find that...请问这一问一答对吗？ I love my family.I can't forget it / that. Question:It or that .Which is right? Why? That's unfair for him,_____?A is it B isn't it Cis that D isn't that It is that all?是什么意思？ It is like that that way i don't think it is the right time that you___ That is a way it is celine-that is the way it is It isn't until 12o'clock that he do sth ,为什么不用it is until?