八年级英语下册unit10 的知识点

时间:2021-03-05 15:08:37 英语知识 我要投稿

八年级英语下册unit10 的知识点

  Unit 10

八年级英语下册unit10 的知识点

  理解:要点诠释

  单词

  1.prevent

  讲:v.阻止;阻碍;阻挠

  常用结构:prevent sb./sth.fr ding sth.阻止某人做某事

  例:The accident culd have been prevented.

  这次事故本来是可以防止的。

  He is prevented b la

  我们现在可不能放松啊。

  (2)let ut放走;释放;发出(声音);放大(衣服)。

  I let ut a shut when I hurt finger.

  我弄伤手指时发出一声大叫。

  The waist in these pants needs t be let ut.

  这条裤子的裤腰需要放出点来。

  练:(2010湖南模拟) He accidentall _______he had quarreled with his wife and that he hadn’t been he fr a cuple f wees.

  A.let ut B.t care

  C.ade sure D.ade ut

  提示:本题考查短语动词的辨析。从句子的意思分析,此处应该表示“偶然(accidentl)透露出”,所以使用let ut。

  答案:A

  句型

  “介词+which+动词不定式”作定语

  讲:请观察下面教材原句:

  ...and she had nl $1.87 with which t bu i a present.

  ……她只有一美元87美分用来给吉姆买礼物。

  本句型为“介词+which+动词不定式”作定语,相当于介词+关系代词which引导的定语从句。本句可以改为:She had nl $1.87 with which she culd bu i a present.

  例:She had n tie left in which t pac her things.

  她没有时间收拾行李。

  It was a bad seasn in which t have utings.

  这不是一个适于郊游的季节。

  She has a little ne in ban with which t help her ther.

  她在银行有点存款,用来帮助她的妈妈。

  链接提示

  with which t bu i a present作定语,该短语中只能使用代词which,不可使用其他代词。

  练:I’d lie t get a part-tie b t earn re ne________t bu a cputer.

  A.with which B.t which

  C.at which D.fr which

  提示:此处表示“用挣来的钱买一台电脑”,所以用介词with。

  答案:A

  辨析

  1.search,search fr

  search用作及物动词时,意思是“搜查某地或搜身”,其后直接跟表示房屋、人身、衣服等的名词作宾语。

  search fr用于表示“寻找或搜索某人或某物”。

  即时练习:

  (1)When Fleing returned fr the war,he began ________the cheical he believed culd treat infectins.

  (2)The plice________ hi everwhere.He was caught at last and nw the plice are________ hi.

  (3)His huse had clearl been________ and the b was issing.

  (4)The uths were arrested and________ anthing that wuld incriinate the.

  答案:(1)searching fr (2)searched fr;searching (3)searched (4)searched fr

  2.discver,invent,find

  discver指“发现”原本存在而未为人所知的东西;discver还作“发现(某种情况)”讲,后面可以接名词、代词、复合宾语、宾语从句。

  invent指“发明”原本不存在的东西。

  find指“找到”原本丢失的东西。

  即时练习:

  (1)Electricit wasn’t________ b Edisn,but he________ the electric light.

  (2)Have u________ the bie u lst last wee?

  (3)We________ her t be a gd dctr.

  (4)This ind f achine was________ an ears ag.

  答案:(1)discvered;invented (2)fund (3)discvered (4)invented

  诱思:实例点拨

  【例1】(2010重庆模拟) —What’s wrng with ur cat?

  —ust nw when I wanted t get ff the bus,the an next t e________ n it.

  A.sat B.had sat

  C.had been sitting D.was sitting

  提示:句意:“你的上衣怎么了?”“刚才我正要下车时,坐在我旁边的那位男士正坐在上边。”when表示的时间可指从句的动作刚刚发生,主句的动作正在进行。

  答案:D

  讲评:过去进行时表示在过去某一时刻正在进行的动作,本题是通过语境来体现的`。

  【例2】(2010辽宁模拟) All these gifts ust be ailed iediatel________ in tie fr Christas.

  A.in rder t have received B.in rder t receive

  C.s as t be received D.s as t be receiving

  提示:所有的礼物都应立即被寄出去,当然是为了使它们及时被收到。in rder t和s as t都表目的,receive和gift之间因是被动关系,所以s as t be received正确。

  答案:C

  讲评:首先要了解在这里s as t 和in rder t是没有区别的。选择的关键在于动词不定式的时态和语态,可以先选择一点入手,然后进行对比。

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