than的用法

1 用以引出比较的第二部分,如I am older than her。2 用以比较数量、距离等多于、少于、小于,如It never takes more than an hour。3 表示一件事紧跟着另一件事发生,常用短语：no soon …than 如No soon had I sat down than there was a loud knock on the door。我刚坐下来就有人敲门 又hardly…than 如 Hardly had we arrived than the problem started。我们刚到问题就来了