英语必修三第四单元Reading知识点

5.They multiplied and filled the oceans and seas with oxygen, which encouraged the
1) Multiply v. 乘,增加,繁殖 蚊子在夏天繁殖得很快.
Mosquitoes multiply rapidly in summer. 2) encourage v. 鼓励,促进 encourage sb. to do sth 老师鼓励我们上课说英语. The teacher encourages us to speak English in class.
allowed the earth to dissolve harmful gases… 1) allow sb. to do…= permit sb. to do… My father doesn’t allow_________ smoking at home. allow us to smoke In fact he doesn’t _________________ anywhere at any time. 2) Harmful adj. Opp: harmless harm n. be harmful to sb./sth.= do harm to sb. /sth. 对…有害
Language points
1. What it was to become was uncertain until … Not…until…直到…才…ቤተ መጻሕፍቲ ባይዱIt is/was not until… that… 强调句
他昨天直到七点才离开学校. He didn’t leave school until seven o’clock. It was not until seven o’clock that he left schoo 他们到了中国才能看了长城. The couldn’t see the Great Wall until they came to China. It was not until they came to China that they
on time In no time 按时;准时 立刻,马上
at times
at a time
有时
每次;依次
once upon a time 从前
4. As the earth cooled down, water began to appear on its surface. 随着地球的冷却, 地球的表面就开始出现了水。 cool 1) v. Please open the window to cool the room. Don’t drink the tea before it cools a little. 2) adj. 凉爽的，冷静的，沉着的，冷漠的，冷淡的 be/get/seem/keep cool His songs received a cool response from the public. cool down a.凉快起来，冷却 b.指人的心境“平静下来，使…平静下来” A heated argument can be settled better if both sides cool down first. I tried to cool her down but she was still very angry when she left. Don’t cover the TV until it cools down.
过多的二氧化碳对环境有害. Too much carbon dioxide is harmful to / does harm to the environment.
This produced a chain reaction, which made it possible for life to develop. 1) Chain reaction 连锁反应 2) Make it possible to do 使…. 成为可能 make it + adj.+(for sb.) to do sth. 组长让我们可以一起合作. The group leader made it possible for us to work together. ____________________________ 老师让他们很容易地明白那个问题. The teacher made it easy for them to understand the question. _______________________________.
2. They were in time to produce carbon,…, which were to make important is
in time: 及时;最终 in time (for sth. /to do sth.): 迟早；最后
我迟早会遇见他.
in time I’ll see him________.
她会及时回来准备晚餐. She will be back __________ in time to prepare dinner. 你认为我们能及时赶上火车吗?
Do you think we can get there in time for _________the train?
与time相关的短语:
(sth) be to (do): 1. 不可避免要发生或必须发生。 They said goodbye, little knowing that they were never to meet again. She is to be honoured for this great work. 2 表示按计划、安排要发生的动作 They were to have been married last week The train is to arrive in BeiJing at 10:25 3 表命令 Tell her she is not to be back late!