as if! said to show that you do not believe something is possible 不对!不是这样! A: "Did you get a pay rise?" 你加薪了吗? B: "As if!" 没影的事儿! A: Do you think Joe will be here early today? 你觉得乔今天会早早就到吗？ B: As if ! He's never early, and there was a party last night, too ! 怎么可能！他从来不早到，而且昨天晚上也有个聚会来着！