Unit 4 Natural disasters 必考短语和句型短语： 1.natural disaster 自然灾害 2.think of 想起，想到 3.be interested in ... 对......感兴趣 4.be worried about 担心 5.dream about 梦见，梦到 6.such as 例如 7.pass by 通过；经过 8.stick with 持续，坚持 9.worry about 担心 10.think about 考虑 11.stare at 盯着看，凝视 12.in surprise 惊讶地 13.for now 暂时 14.so...that... 如此......以至于...... 15.wait for 等候 16.pack up 收拾行李 17.for example 例如 18.write down写下 19.survival kit 救生包 20.in the end最后 21.from...to... 例如 22.how far 多远 23.pay attention to 注意，留心 24.fall down倒塌 25.at once 立刻 26.as...as possible 尽可能......地 27.wake up 醒来 28.in case of 假如 29.stay away from... 远离...... 30.sit around 无所事事地消磨时间；闲坐 31.fall on deaf ears 不被理睬，不被注意 短语用法： 1.start to do sth. 开始做某事 2.have to do sth. 必须/不得不做某事 3.try to do sth. 试图/尽力做某事 4.it is/was adj. to do sth. 做某事是......的 5.afford to do sth. 负担得起做某事 6.have no time to do sth. 没有时间做某事 7.it seems that +从句 似乎...... 8.want to do sth. 想要做某事 9.stop doing sth. 停止做某事 10.ask sb. to do sth. 让某人做某事 11.be able to do sth. 能够做某事 12.suggest doing sth. 建议做某事 13.It takes (sb.) some time to do sth.（某人）花费多少时间做某事 14.make +宾语+形容词 使某人/某物...... 15.find sb.+doing sth. 发现某人正在做某事 16.let sb. do sth. 让某人做某事 17.adj./adv. enough to do sth 足够......可以做某事 18.had better do sth. 最好做某事 19.help sb. (to) do sth. 帮助某人做某事 20.expect sb. to do sth. 期待某人做某事 21.keep doing sth. 一直做某事 【经典句型】 1.It’s important to stick with it.坚持工作很重要。 2.I have no time to think about the flood.我没有时间考虑洪水。 3.It took a long time to build the house.建这座房子花了很长时间。 4.It seems that nobody is paying any attention to the flood.似乎没有人关注那场洪水。 5.It is not a good idea to sit around and worry about the flood.闲坐着担心洪水不是一个好主意。 必考语法： it 作形式主语的用法 代词it可以用来代替一个名词、一个短语、一个句子，在句中作主语或宾语。本单元学习it作形式主语的几种情况。 1. it作主语指时间、日期、天气、距离和气温等。 It’s nine o’clock now. （指时间） It is much colder than it was yesterday. （指天气） It is about 5 kilometres from here to my home. （指距离） It is very hot in the classroom. （指气温） It is Sunday today. （指日期） 2. It作形式主语代替动词不定式，常用于以下句型中： (1) it is/was adj. (of/for) sb. to do sth.当表语是与事物的特征有关的形容词时，如easy, difficult, hard, important,necessary等，用介词for.It is difficult for Lucy to learn physics.It is interesting for us to play badminton.当表语是描述人的性格、品质的形容词时，如kind, nice, polite, clever, foolish, stupid等，用介词of.It is kind of you to help me.It is clever of the little child to work out such a difficult math problem. (2) it takes/took sb. some time to do sth.It takes him an hour to do his homework every day. (3) it is/was n. to do sth.It is great fun to have a party here.It was a great plea ... ...
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