Unit 2 Topic 3-2021-2022九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 3 What can we do at home to protect the environment 第一部分 知识点精讲精练 一、词汇拓展记忆 1．protect ______________ (名词) 2．organization _______________ (动词) 3．nod ___________ __________ (现在分词—过去分词) 4．agree _____________ (名词)　 5．act _____________ (名词) 6．disadvantage ______________ (反义词) 7．electricity _____________ (形容词) 8．German ___________ ___________(名词“德国”) 9．plant ______________ (名词) 10．dry__________ __________ (动词第三人称单数—动词过去式) 二、重点词组短语 1．为……工作work for 2．省钱 save money 3．鼓励某人做某事 encourage sb.to do sth. 4．把易拉罐分类sort soft drink cans 5．赶快，快点hurry up/in a hurry 6．放弃give up 7．应该ought to 8．关掉，停止shut off/turn off 9．代替instead of/take one’s place 10．节约能源save energy 11．减少空气污染reduce air pollution 12．呼救cry for help 13．毕竟；归根结底after all 14．用完；耗尽run out 15．尽管 even though 16．等候wait for 17．允许某人做某事allow sb.to do sth. 18．使某人吃惊的是to one’s surprise 三、知识点解析 1．We should use both sides of paper and reuse plastic bags.我们应该双面使用纸张，并且再次使用塑料袋。 both两者都 My parents are both office workers.我父母都是办公室职员。 (1)both “(两者)都”，neither“(两者)都不”，either“ (两者)之一”； (2)both...and...“两者都……”，当连接句子的两个主语时，谓语动词常用复数形式；neither...nor...“既不……也不……”，当连接句子的两个主语时，谓语动词就近原则；either...or...“或者……或者……”，表示两者之一，当连接句子的两个主语时，谓语动词就近原则；not only...but also...“不但……而且……”，当连接句子的两个主语时，谓语动词就近原则。 【即学即练】 ①________ Anna ________ her brother like listening to soft music. A．Both；and B．Neither；nor C．Either；or D．Not only；but also ②—I like the two dresses，but I can only afford ________ of them. —I suggest you take the white one. A．all B．both C．neither D．either 2．Nodding the head means agreement.点头表示同意。 agreement n．同意；一致；协议 They had an agreement never to talk about work at home.他们约定在家中绝不谈工作。 (1)agreement名词，“同意；一致；协议”，反义词是disagreement； (2)agree动词，“同意”，agree with sb.同意某人的意见。 【即学即练】 ①The two sides failed to reach __________(agree)． ②他们与澳大利亚签有自由贸易协定。 They have a free trade __________ with Australia. 3．He has failed several times，but he never gives up.虽然他已经失败几次，但他绝不放弃。 give up放弃 She doesn’t give up easily.她不轻易认输。 与give相关的短