他看起来好像整晚没睡。

He looks ___as ___if he hasn't slept all night.

她说起话来好像自己是这个话题的专家。

She spoke ___as ___though she were an expert on the topic.

他目光呆滞，仿佛陷入了深深的恍惚。

He stared into space ___as ___if in a deep trance.