If we are ever going to protect the atmosphere,it is crucial that those new plants be enviornmentally sound. 这是英语真题2005年TEXT2 文章中最后一句,想问,主句那个be是在这个句型中的固定用法还是什么?求大神指教,纠结好久了
呵呵,前面省略了should这个情态动词。 句子结构是:it is crucial that + 句子(谓语动词should+动词原形)-------should可以省略。又如: it is important / crucial / necessary / imperative that she (should) come on time for the occasion.