句型16：either ... or...

　　Either you or he is right .

　　不是你对就是他对。

　　句型17：neither ... nor ...

　　Neither he nor I am a doctor.

　　我和他都不是医生。

　　句型18：... as soon as ...

　　As soon as we were inside, the rain began to bucket down.   

　　我们刚进屋，大雨便倾盆而下。

　　句型19：... so+adj. / adv.+that ...

　　I was so tired that I didn't want to have a supper.

　　我累得连晚饭也不想吃了。

　　句型20：Though...+主句

　　Though he is rich, his life is not happy.

　　他虽然很有钱，但生活并不幸福。