资源简介 人教版八年级下册英语第三单元课本知识重点和语法聚焦重点Unit 3 Could you please clean your room 1.could 与 can 的用法区别:could 与 can 都是情态动词,二者都可用于表示请求的句子中,但是用法稍有不同。can 表示一般性的请求,语气较随便,常用于熟人之间或长辈对晚辈、上级对下级的场合。例Can you tell us your story, Tony 请给我们讲讲你的故事好吗,托尼?could 表示有礼貌的请求,语气委婉,常用于非熟人之间或晚辈对长辈、下级对上级的场合。例如: Could you pass the salt to me 请你把盐递给我,好吗?Could you please clean your room 请你打扫一下你的房间,好吗?2.She didn’t do any housework and neither/nor did I.neither作副词,意为“也不”,“Neither+系动词 (助动词/情态动词)+主语”表示前面所述否定内容也适用于另一个人或物。也可用nor替换neither使用,表示现实情况的否定。She did some housework and so did Iso作副词,意为“也是如此”,“so+系动词 (助动词或情态动词)+主语”表示前面所述内容也适用于另一个人或物。表示与现实情况相符也适用于另一主语。3.The minute I sat down in front of the TV, my mom came over.1.The minute 一…就.... 相当于as soon as/the moment如:The minute I called her, she stood up.4.come over 过来,走过来如:I am doing my homework when my mother came over.I'm just as tired as you are.5.As…as 像…一样 用于同级之间的比较。结构:as+原级+as 如:The film is as interesting as that one.否定.Not as/so …as 不如…比不上…如 He doesn’t study so hard as his brother.6.Could I invite my friends to a party invited 为及物动词,意为“邀请;约请”。invite sb. to do sth. 意为“邀请某人做某事”。如:We invited all our friends. 我们邀请了所有的朋友。拓展:invite 的名词形式为invitation,意为“邀请;请帖”。如:Thank you for your kind invitation. 感谢你的盛情邀请。7.borrow some moneyborrow表示“借入” borrow sth from sb“向某人借某物”You can borrow that book from the library. 你可以从图书馆借那本书。lend表示“借出” lend sb sth =lend sth to sb “借给某人某物”He’s going to lend his bike to Tom. 他要把自行车借给Tom。8.It is the parents’ job to provide a clean and comfortable environment at home for their children. 在家中给他们的孩子提供一个干净、舒适的环境是家长们的事情。it 为形式主语,真正的主语是provide a clean and …for their children. it’s one's job (duty) to do something. 看作一个固定句型,表示“做某事是某人的职责”9.And anyway, I think doing chores is not so difficult. 反正我觉的干家务也不太难。anyway 是个副词,置于句首时,其后常常用逗号与其他成分隔开。意为“反正,仍然,依然”。如:Sam didn’t get the job, but he is not unhappy because it didn’t pay well anyway.anyway还可以表示“不管怎样,无论如何”如:It’s just a cold. But anyway you should still see the doctor.10.The earlier kids learn to be independent, the better it is for their future. 孩子们越早学会独立,对他们的未来就越好。“the +比较级+……, the +比较级+……” 表示“越……,就越……”。如:The more he explained, the better we understood.他解释的越多,我们就理解的越透彻。语法聚焦情态动词could的用法1.表示“能力”或“可能性”,作为can的过去形式。如:Could you speak English then? 那时你能讲英语吗?He said he couldn't follow me. 他说他跟不上我。2.比较委婉客气地提出问题或陈述看法。如:—Could you let me have your passport —Yes, here it is.—看看你的护照好吗? —行,这就是。I could come earlier, if necessary. 如果必要我可以早点来。3. 表示惊异、怀疑、不相信等情绪。如:Who could have taken them? 谁会把它们拿走了呢?She couldn't have left so soon. 她不可能这么快就走了。在这种情况下,could和can是可以换用的,用could时口气较缓和,用can时不相信的程度更强一些,两者在时间上没有差别。4.can, could 和 be able to的区别与联系1. can的过去式是could,但could 除了可作can的过去式外,还可表比can更委婉的语气,因此在回答由could 表示请求的问句中,不能用could,但可用can。如:—Could you lend me a hand 你可以帮我一下吗?—Of course I can.当然可以。2.在表示现在或过去的智力、体力、技能等方面的“能力”时,can, could 常可与be able to互换。如:He could (or was able to) swim five miles when he was a boy.当他还是个男孩的时候他可以游五公里。3. be able to有比can更多的形式,如"will be able to","have (has) been able to" "had been able to" 等等。因此be able to常被用来表示can所不能表示的将来或完成的概念。如:hey will be able to run this machine on their own in three months. 他们过三个月就能自己开这台机器了。4.在表示成功地做了某事时,不用could,而用was / were able to (或managed to, succeeded in doing sth )来表示。如:He was able to (or managed to) finish the job yesterday。 展开更多...... 收起↑ 资源预览