We were having a meeting when someone broke in. 我们在开会的时候，有人突然闯入。

We were about to set off on our way when it suddenly began to rain. 我们快动身离开的时候，天突然下起雨来。

25. a good/ large amount of + 不可数n.

(作主语时，谓语动词用单数)

good/ large amounts of + 不可数n.

(作主语时，谓语动词用复数)A good amount of damage was done in a very short time. 短时间内就造成了严重损害。

Large amounts of money were spent on the bridge. 那座桥耗资巨大。

26. in rags 穿得很破烂

The detective dressed himself in rags.那个侦探把自己打扮得衣衫褴褛。

27. take a chance 冒险，碰运气

28. as for 至于，关于，就……而言

= as to He is taking a chance by driving his car so fast. 他冒险把车开得这么快。

As for Tom, he did quite well. 至于汤姆，他做得不错。

高中英语必修三知识点总结：Unit 3就为大家整理到这里了，希望能帮助到大家!