(4) 三者均可用于 it 开头的句子,但look 之后通常接 as if (asthough)引导的从句,appear之后通常接that引导的从句,seem 之后则可接that和as if (as though)引导的从句。如: It looks [seems] as ifyou’re right. 好像你是对的。 It seems [appears] that he isill...