29. cheer sb. on 为某人加油;鼓励

The crowd cheered the runners on as they started the last lap. 赛跑进入最后一圈时，观众为运动员加油鼓劲。

30. now that… 既然……

= since…Now that everyone is here, let’s discuss the problem. 既然大家都到了，让我们开会吧。

31. get the hang of (doing) sth. (口语)掌握(做)某事的窍门、要点

Have you got the hang of driving a car? 你掌握开车的窍门的了吗?

I don’t quite get the hang of his speech. 我不十分了解他讲话的要点。

32. break out (火灾、战争等)爆发

World War II broke out in 1939. 第二次世界大战是1939年爆发的。

33. come about 发生

(是不及物动词短语，无被动语态)How did it come about that you got lost? 你怎么会迷路了呢?

34. watch out (for…) 当心，提防

You’ll be cheated if you don’t watch out. 如果你不当心，就会上当受骗。

Watch out for cars when you cross the road. 过马路时要当心车辆。

35. 倍数的表达方法：

1)A is + 倍数 + as + adj./ adv. + as B

“A 是B的……倍”

2)A is + 倍数 + 比较级 + than B

“A比B……倍”

3)A is + 倍数 + the size (height, length, width等) + of B

“A 是B的……倍”

The population of China is about six times as large as that of the United States. 中国的人口大约是美国的6倍。

The jet fighter flies three times as fast as sound. 这架喷气式战斗机的飞行速度是音速的3倍。

This room is three times larger than that one. 这个房间比那个房间大3倍。

This room is three times the size of that one. 这个房间是那个房间的3倍大。

以上就是小编为大家准备的高一英语必修三重点词组知识点总结，希望给大家带来帮助。

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