原因目的结果状语从句知识点考点复习
原因状语从句
  比较because, since, as和for的用法：
  1.because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知的，就用as或since。
  I didn't go, becaus e I was afraid.
  Since / As the weather is so bad, we have to delay our journey.
  2.由bec ause引导的从句如果放在句末，且前面有逗号，则可以用for来代替。如果不是说明直接原因，而是多种情况加以推断，就只能用for。
  He is absent today, because / for he is ill.
  He must be ill, for he is absent today. 
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目的状语从句
  表示目的状语的从句可以由 so that, in order that, lest, for fear that, in case等词引导。
  You must speak louder so that  / in order that you can be heard by all.
  He wrote the name down for fear that(lest)he should forget it.
  Better take more  clothes in case the weather is cold.

结果状语从句
  结果状语从句常由so...that 或 such...that引导。so...that与s uch...that之间可以 转换。
  The boy is so young that he can't go to school.
  He is such a young boy that he can't go to school.

  1.—How lovely these children are!
  —Yeah.They______ memories of my childhood.
  A. called out B. called for C. called up D. called on
  【解析】call out“出动, 向…叫喊”， call for “需要，要求”， call up“召集, 使想起, 提出, 打电话给”， call on“号召, 呼吁, 约请, 访问”。此句意思是“他们引起了我对童年的回忆。”因此选C。
  【答案】C
  2.Many kids ________ the net bar, and _____had a bad effect on their studies.
  A. are addicted to; it B. get engaged in; which
  C. are related to; what D. are addicted to; which
  【解析】be addicted to 意思是“对…上瘾”，符合题意。And 是一个并列连词，后面应该是并列句，而不是从句，因此排除B和D。be related to“与…有关”，不符合题意，因此排除。
  【答案】A
  3.
  After studying in a medical college for five years, Jane her job as a doctor
  in the countryside.
  A.set out B.took over C.took up D.set up
  【解析】set out“出发, 开始” take over“接收, 接管”take up“从事” set up“设立”根据题意，应选C。
  【答案】C
  4. Thoug h we _________serious natural disasters, we are sure to overcome all difficulties.
  A. give away B. affect with C. suffer from D. deal with
  【解析】give away“分发, 放弃, 泄露”， affect“影响”及物动词， suffer from“遭受” ，deal with“处理”。从“ we are sure to overcome all difficulties.”这句话可以推断出前半句的意思应该是“尽管我们遭受着严重的自然灾害”，因此应选C。
  【答案】C
  5. The shop assistant was fired as she was _________ of cheating customers.
  A.accused B.charged C.blamed D.caught
  【解析】be accused of “被控告” accused与of 搭配，符合题意。 be charged with“被控告”charge 和with 搭配。 blame “责备”。 
  【答案】A

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