句型25：... because ... / ...，so ...

　　I don’t know all your names because this is our first lesson.

　　因为这是我们的第一节课，所以我并不知道你们所有人的名字。

　　句型26：Why don’t you ... / Why not ...

　　Why don’t you come to school a little earlier?

　　为什么不早点到校呢？

　　句型27：make it

　　Let’s make it half past nine.

　　让我们定在九点半吧！

　　句型28：have nothing to do

　　They have nothing to do every day.

　　他们每天无所事事。

　　句型29：be sure/ be sure of/ about sth. / be sure to do sb.

　　I think so, but I’m not sure.

　　我想是这样，但不敢确定。

　　I was not sure of / about the way，so I asked someone.

　　我对于怎么走没有把握，所以我问别人了。

　　句型30：between ... and ...

　　There is a shop between the hospital and the school.

　　在那家医院和那所学校之间有一家商店。