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。

　　句型31：keep sb. / sth. ＋adj./ V-ing/ 介词补语/ adv.

　　You must keep your classroom clean. 你们必须保持教室干净。

　　Sorry to have kept you waiting. 对不起，让你久等。

　　Can you keep him in the room ？你能让他在这个房里吗？

　　Keep them here. 让他们在这儿呆着。

　　句型32：find ＋宾语＋宾补

　　He finds it very hard to travel around the big city . 他发现要环游这个大城市是很难的。

　　句型33：... not ... anymore/ longer

　　The old man doesn’t travel any more. 这位老人不再旅行了。

　　He isn’t a thief any longer. 他不再是个贼。

　　句型34：What’s the weather like...？

　　What’s the weather like in spring in your hometown ？在你们家乡春天天气怎么样？

　　句型35：There is no time to do/ have no time to do

　　There was no time to think. 没有时间思考。

　　I have no time to go home for lunch. 我没有时间回家吃午饭。