不常用的情况 1)虚拟语气的考点为:would rather that从句 一般过去时:it is vital/necessary/important/urgent/imperative/desirable/advisable/natural/essential that 动词原形;it is time/about time/high time that 一般过去时:proposal/suggestion that 动词原形;lest that should 动词原形;if only that would 动词原形。 2)状语从句的考点为:非if引导的条件状语从句,此类句子多用at times,provided,so long as,incase,once等来替代if;由even if/so,now that,for all等引导的让步状语从句;just/hardly…when引导的时间状语从句;more than,as…as,not so much as,the same as,as much as等引导的比较状语从句。