谁知道英语中虚拟语气的用法?怎样判断句子是否用虚拟语气?答:三、虚拟语气主语从句在It is (was)important (necessary, desirable, imperative, advisable, incredible, urgent, possible, essential, natural, preferable, insistent, crucial, better, best, ridiculous, vital) that…能及It is (was) a pity (shame, wonder, must, suggestion, proposal, requirement, ...