as if后的时态

　　The house looked as if it was about to fall down.

　　房子看起来好像就要倒塌似的。

　　Her head felt as if it would burst.

　　她觉得头要爆裂了。

　　He made as if to speak.

　　他似乎要说点什么。

　　I don't feel as if I belong here.

　　我在这里感觉格格不入。

　　I felt as if my heart had stopped.

　　我觉得好像我的心都不跳了。