Unit 2 Topic 2-2021-2022九年级英语上册知识点精讲精练+ABCD每课作业（仁爱科普版）

Unit 2 Saving the Earth Topic 1 All these problems are very serious. 第一部分 知识点精讲精练 一、词汇拓展记忆 1．although ____________(近义词) 2．nearly ___________(近义词) 3．behavior ______________(动词) 4．discover _______________(名词) 5．shortage _____________(形容词) 6．complete _____________(副词) 二、重点词组短语 1．变成change into 2．阻止……做某事stop...from doing sth. 3．吹/刮走……blow away 4．(水)冲走……wash...away 5．保护环境protect the environment 6．灭绝die out 7．到处here and there 8．关爱，关心care for/ look after/take care of 9．摘花pick flowers 10．浇灌植物water plants 11．公共场合in public 12．制定规则make rules 13．遵守规则obey/follow the rules 14．违反规则break the rules 15．全世界all over/around/throughout the world 16．避免做某事avoid doing sth. 17．被……覆盖be covered with 18．短缺be short of 三、知识点解析 1．Trees can stop the wind from blowing the earth away.树可以阻止风刮走土壤。 stop...from doing 阻止做…… How can I stop him from smoking? 我怎样才能阻止他吸烟？ (1)stop doing “停止做……”，对于已经在进行的事情而言； (2)stop to do 指停止在做的事而去做另一件事，如：He felt tired and he stopped to have a rest. 【即学即练】 ①The heavy rain didn’t stop them ________ working on. A．of　　　 B．from C．to ②He looked up to stop the tears from ________. A．falling B．fall C．fell ③He stopped ________ on his doctor’s advice and became healthy. A．to drink B．drink C．drinking 2．Although we have built “The Green Great Wall”，we still need to do something to protect the environment.虽然我们建起了“绿色长城”，我们还是需要做些事情来保护环境。 although conj.虽然；即使；纵然 Maybe I’m not very healthy，although I have one healthy eating habit.也许我不太健康，尽管我有健康的饮食习惯。 (1)although＝though，意为“虽然；即使；纵然”，可以引导让步状语从句。 (2)although不能和but用在同一个句子中，但可以和yet用在同一个句子中。类似的不能用于同一句中的词还有because和so。 【即学即练】 ①They will try their best in the Dragon Boat Racing ____ they may fail. A．if B．although C．unless D．until ②You shouldn’t stay up too late，____ computer games are fun to play. A．and B．because C．unless D．though 3．None of us like pollution.我们都不喜欢污染。 none pron.没有一个，毫无 We invited 10 people to the party，but none actually came. 我们邀请了10个人来参加聚会，可最后谁都没来。 (1)neither两者都不， none(三者以上)没有一个，all (三者以上)都，both (两者)都，either两者中任一个，each每