as if

1. In the same way that it would be if: looked as if she were made of ice.
2. That: It seemed as if the meeting would never end.

Also, as though. As it would be, as in He decided to accept, as if it really mattered, or John scowled as though he were really angry. The first idiom dates from the late 1500s, the variant from the late 1700s. Also see make as if.