句型11：the +比较级，the +比较级

　　he more one has，the more one wants。

　　越有越贪。

　　句型12： as +adj/ adv+as …not as(so) +adj / adv +as ...

　　Do you think that art is as important as music?

　　你认为艺术和音乐一样重要吗?

　　Last Sunday the weather was not so wet as it is today.

　　上个星期天的天气不如今天的天气潮湿。

　　句型13：more/ less +adj+than

　　I think art is less important than music.

　　我认为艺术不如音乐重要。

　　句型14：stop…from doing sth

　　The Great Green Wall will stop the wind from blowing the earth away。

　　绿色长城将阻挡风吹走土壤。

　　句型15：both ... and ...

　　Both you and I are students。

　　我和你都是学生。

　　句型16：either ...or...

　　Either you or he is wrong .

　　不是你错就是他错。

　　句型17：neither ... nor ...

　　Neither he nor I am a student。

　　我和他都不是学生。

　　句型18：... as soon as ...

　　As soon as I see him，I’ll give him the message.

　　我一见到他，我就把你的消息告诉他。

　　句型19：... so+adj / adv+that ...

　　I was so tired that I didn’t want to speak。

　　我累得连话也不想说了。

　　句型20：Though......+主句

　　Though I like writing to my pen-friend，it takes a lot of time.

　　虽然我喜欢给笔友写信，但它要耗费我大量时间。