live on和must be和ought to英语知识点精析
摘要: liveon和mustbe和oughtto英语知识点精析1.“此前认为，原以为”的表达法：Ah,youarehere.Ithoughtyouhadgonehome.啊，你在这儿......
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live on和must be和ought to英语知识点精析 1. “此前认为，原以为”的表达法：Ah, you are here. I thought you had gone home.啊，你在这儿，我原以为你已经回家了。 2. tell tell sb. sth. 告诉某人某事 tell sb. to do sth.告诉某人做某事 tell the difference between A and B 说出A和B的区别 tell A from B 把A和B辨别出来 3. A is different from B A和B不同 tell the difference 说出区别 make a difference 有区别 make no difference 无区别 4. 形容词最高级和序数词连用，表示“居第几位” The river is the second longest river in this city. 这条河是这个城市的第二长河。5. cover a table with a cloth用一块台布铺桌子 cover fifty miles 走过五十英里 cover(an area of)2000 square metres 占地2000平方米 cover an event 采访这个事件 the cover of the book 书的封面 be covered with/by 覆盖 6. where引导状语从句 Put the book where it was. 请把书放回原处。 7. 连词加分词作状语 When asked where she was, she began to cry. 当问她来自哪里，她哭了起来。 Be careful when crossing the road. 过马路时要小心。 8. live on 靠……为生 depend on 依靠feed on 以……为主食 grow rich on 靠……变富 9. live on 以……为主食 live by靠(手段)生活live through经历，活过 live a happy life过幸福生活 a live concert 现场直播音乐会 a live boy一个活泼的男make a living 谋生 发散联想 It must be our teacher. It can’t be our teacher. Can it be our teacher? make a mistake犯错by mistake 出于错误 mistake A for B 把A错当成B Youre mistaken. 你错了。 She ought to help me. 她应该帮助我。 You ought to have told me about it. 你应该告诉我那件事。You oughtnt to have said to her like that. 你真不应该那样对她说话。(但事实说了) get sb. to do sth. 叫某人做某事 get sth. done 使某事完成 get sth. doing 使某物动起来 have /let/make sb. do sth. 叫某人做某事 常见系动词 ①表感觉：feel,taste,smell,sound ... ②表状态：be,seem,appear ③表保持状态：remain,stay,keep,continue ... ④表状态变化：become,turn,get,grow,go,fall ... (2)fall behind fall into a bad habit fall down fall off fall to the ground fall ill/sick/asleep/silent have many falls a heavy fall of rain一场大雨 (3) cut down砍倒 cut out切下，剪下 cup up切碎；剁碎cut down one’s expense减少开支 cut in插嘴 cut off切断(煤气、自来水等) 切断电话 使(人、城镇)孤立 cut open have one’s hair cut cuts on one’s arm (4) at ①同某些形容词或分(angry,delighted,glad,happy,sad surprised等)连用，表示引起某种情绪的原因. 意为“为”、“由于”、“对于”。 ② 表示速度、价格 at the speed / rate of at full speed at a high/low price ③ 表示“处于...状态”。 at war at work at rest in the bed ④用于时间上的某一点、 某一时刻或年龄 at 8 a.m. at noon/night at that time at (the age of)16 ⑤表示“在……处； 在……旁；朝……” at the doctor’s at the window 
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