Unit 13 We're trying to save the earth ！第 1 课时 (Section A 1a － 3b)短 语1 ． play a part in点拨play a part in 意为“在……中起作用；扮演角色；参与……”， 其后面如果接动词，要用动名词形式。链接play with 和……一起玩play against 对抗2 ． clean up点拨 clean up 意为“打扫干净；整理好”，强调对某物进行整理和打扫，使其变得更加干净。如：I will clean my old books up. 我要把我的旧书整理一下。链接(1)clean-up 是合成词。如：Today is a Clean-up Day. 今天是清洁日。(2)clean out 意为“扫除；清除；打扫干净”，强调将某物扫除掉，将其扔掉，从而达到干净的效果。如：I asked the children to clean out their desks. 我叫孩子们把他们的课桌清理一下。3 ． instead of点拨辨析instead of 意为“代替；而不是”。instead 与 instead of(1)instead of 是短语介词，后面一般接名词、代词、动名词或介词短语做宾语。 instead of 如果后面跟介词短语，介词不可省略。如：We will have fish instead of meat this evening. 我们今晚吃鱼不吃肉。They'll have tea in the garden instead of in the house. 他们在花园里，而不在屋子里喝茶。 ( 此句中的 of 和 in 均不可省略 )(2)instead 单独使用时，是做副词，意思是“代替；顶替”。如：Last summer I went to Qingdao.This summer I'm going toDalian instead. 去年夏天我去了青岛。今年夏天我打算去大连。4 ． cut off点拨cut off 意为“切除；切断；中断”，后可跟宾语。如果宾语为代词，要放在两词之间，宾语是名词，则可置前或置后。如：In order to save his life, he cut off his arm himself. 为了挽救他的生命，他自己切断了胳膊。链接cut down 砍倒；削减，减少 (on)cut up 切碎；剁碎cut in 插嘴；插车抢道cut across 抄进路；走捷径句 型not only...but also点拨not only...but also 意为“不但……而且……”，可连接两个并列的主语、谓语、表语和宾语等。链接not only...but also…… 的具体用法(1)not only...but also 应连接两个相对称的并列成分。如：Not only Mr.Lin but also his son joined the Party two yearsago. 不但林先生而且他儿子两年前也入了党。 ( 连接两个主语 ...
