【随堂优化训练】九年级英语全册 Unit 13 We're trying to save the earth！第1课时(Section A 1a－3b)课件.ppt

Unit 13 Were trying to save the earth！,第1课时(Section A 1a3b),短 语1play 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,2clean 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。,3instead 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。Theyll 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 Im going to,Dalian instead.去年夏天我去了青岛。今年夏天我打算去大连。,4cut 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),(2)not only.but also 连接两个分句且 not only 位于句首,时，第一个分句中的主语和谓语要部分倒装。如：,Not only does the sun give us light but also it gives us heat.太,阳不但给我们光也给我们热。,(3)not only.but also 不能用在否定句中。,(4)not only.but also 连接两个主语时，谓语动词要和与它,最近的主语保持人称和数的一致。如：,Not only the students but also the teacher was against the plan.,不但学生而且老师也反对这个计划。,(5)not only.but also 中的 not only 不能分开使用，但 butalso 却可以分开使用。并且连接两个并列成分时，可以省略 but或 also，也可以把 but also 都省略掉。如：,The area was not only hit by an unexpected heavy rain,but,some bridges were also washed away.这个地区不仅遭受了一场意外的大雨，而且一些桥也被冲走了。,