仁爱英语八上Unit4知识点.doc

UNIT 4 TOPIC 1重要短语:1. think about 思考 think of 认为，想起 think over 仔细考虑 2. run after 追赶 3. as we know=it is well known that 众所周知4. be important to sb. 对某人来说很重要5.share sth. with sb. 与某人分享某事6.cover...with... 用......覆盖......7. on the surface 表面上，从外表看8. provide sth for sb =provide sb with sth 为某人提供某物9. thousands of 成千上万的（百，千，百万，十亿无具体数目后面要加“s”，如：hundreds of, millions of , billions of....等等。

如果有具体数词连用则不加s，如：one thousand, two thousand, three thousand...）10. play a part in 在…… 起作用11. control oneself 控制自己12. die out 灭绝13. for many reasons 因为许多原因 14.. smaller and smaller 越来越小 （“形容词比较级+and+形容词比较级”结构表示“越来越......”的意思 the+形容词比较级，the+形容词比较级 越......就越......15.protect sth./sb. from sth. 保护某物/某人免于......16. feed on 以......为食 feed sth. to sb./sth. 把......喂给......吃 feed sb./sth. with(on) sth. 拿......来喂......17. in number 数量上18. in danger/ out of danger 处在危险中/ 脱离危险Key Sentence:1. What are you thinking about? 你在想什么呢？——I’m thinking about life in the countryside. 我在想念乡村的生活。

2. I like it very much because the air is fresher, the sky is bluer and the rivers are clearer there. 我非常喜欢乡下更新鲜的空气，更蓝的天，以及更清澈的河流3. I think the countryside is much quieter than the city. 我认为乡下比城里更安静4. People can enjoy the beauty of nature there. 人们可以享受那儿的自然风光5. Which do you like better, plants or animals? 植物跟动物你更喜欢哪个？ ——I like animals better. 我更喜欢动物7. I think roses are the nicest of all the flowers. 我认为玫瑰是所有花当中最美的8. They play an important part in controlling the climate.它们在控制气候方面发挥了重要作用。

9.But now, rainforests are becoming smaller and smaller, so we should protect them.但是现在雨林变得越来越小因此，我们应该保护它们Grammar: 形容词的比较级，最高级变化规则A,单音节和少数多音节的形容词1.一般在词尾加上-er,-est: great—greater—greatest2.以不发音e结尾只加-r,-st: nice—nicer—nicest3.以辅-元-辅(1)，末尾只有一个辅音字母结尾的重读闭音节，双写这一辅音字母,再加-er,-est: big-bigger-biggest4. 辅音字母+y结尾的形容词将-y去掉，然后加-ier,-iest： happy--happier--happiest easy--easier--easiest narrow--narrower--narrowestB.部分双音节和多音节词1.在前面加more,most: difficult—more difficult—most difficult polite--more polite--most polite2.分词形容词前的比较和最高级，一般在其前加more,most: 物: more interesting--most interesting 人:more tired--most tired注意： 不规则变化： good/well--better--best bad/ill--worse--worst little--less--least much/many--more--most far--farther-farthest（只指距离） far--further--furthest（指距离，常指程度）Unit 4 topic 2Key Phrases:1.fall down 倒塌，摔倒，掉下2.another two + n.=two more +n. 再两个，另两个3.lose one’s life/lives 失去生命4. more than 超过5. protect sb. from doing sth 保护某人免受……的伤害6.ask sb. for help 向某人求助7.hear of/about 听说 hear from 收到某人的来信8.how to do sth. 怎样做某事9.run out of 从……跑出来10.stay/keep calm 保持冷静11. be/get hurt 受伤12.keep sb. / sth. + adj. 保持 / 护某人 / 物 …… keep our classroom clean 保持教室清洁 keep us healthy 保持健康13.close to 靠近 / 接近 （介词短语）14. in the middle of 在……的中央15. remember to do sth 记得去做某事（事情还没做） remember doing sth 记得做过某事（事情做了）16. stay away from = get away from 远离……17. be careful of sth 小心某物18. falled power lines 掉落的电线19. be over 结束20. turn on/ off 打开/关掉21. five million 五百万 22. with the help of sb. / sth. = with one’s help 在……的帮助下23. the whole nation 全国24. rebuild one's home 重建家园25. return to normal life 恢复正常的生活26. over again 再次，重新 Key Sentence:1. A terrible earthquake struck Qinghai. 一场可怕的地震在青海爆发。

2. Some people died and many people are missing. 有些人死了，还有好多人失踪了3. I’m very sorry to hear that. 听到那件事，我感到非常抱歉4. I think the Wenchuan earthquake in 2008 was more serious than this one, but the Tangshan earthquake in 1976 was the most serious. 5. How can we protect ourselves from 。