as if/though

as if  

好像, 似乎, 仿佛

Why doesn't she buy me a drink?It isn't as if she had no money!

她为什么不给我买一点饮料?好像她没钱似的!

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as though  

好像, 仿佛

It sounds as though there is a knock at the door.

听起来好像有人在敲门。