英语for sb to do sth的用法总结
 “for+ 不定式”是英语中一个十分有用的结构，不仅在阅读理解中经常出现，而且，如果同学们在书面表达中能巧妙地运用它，将会增添文章亮点，提高文章的档次。为帮助同学们正确理解和掌握这一结构，本文对这一结构的用法作了一个全面的归纳，同时，对于其使用上应注意的地方也给出了详细的说明。

“for+宾语+不定式”的用法注意
1. 其中的不定式有时可以是进行式。如：It’s a new experience for her to be travelling by plane. 坐飞机对她是—次新经历。
2. 其中的不定式有时可以是被动式。如：It is essential for him to be prepared for this. 有必要让他对此有所准备。
3. 能用于it’s adj. for sb to do sth的形容词不多，主要的有bad, bold, clever, common, honest, necessary, nice, normal, pointless, rare, (all) right, rude, sensible, stupid, tactful, thoughtful, typical, unimportant, unusual, vital, wise, wrong等。但是请注意：likely和probable不这样用。如：
她可能今晚到。正：She’s likely to arrive this evening. 误：It’s likely for her to arrive this evening. 
她很可能会发脾气。正：It’s probable that she’ll be in a bad temper. 正：She’ll probably be in a bad temper. 误：It’s probable for her to be in a bad temper. 
4. 该结构中的介词for原则上不能换成to，但在某些特殊结构中可以换成to。如：

The policeman signed for [to] me to stop. 警察打手势叫我停下。

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It will be convenient for [to] me to see you this evening. 今晚去见你，我很方便。注：能这样用to代替for的结构只限于sign to [for], be convenient for [to]等少数情形。 5. 在通常情况下，其中的不定式不能换成动名词。如：你能不能安排在周一把货送到? 正：Can you arrange for the goods to be delivered on Monday? 误：Can you arrange for the goods being delivered on Monday?   

  1. The teacher has a peculiar way of ______her student’s nervousness when then speak English.
  A. breaking down B. going over C. taking off D. giving away
  【解析】A 句意：这位老师有一种疏导学生在说英语时产生的紧张情绪的独特方法。 Break down :to separate something such as an idea or statement into smaller parts in order to make it easier to understand or deal with .go over 复习; take off脱下，起飞;give away分发，赠给，泄露(秘密)。
  2. In the cross-lake swimming race, a boat will be ____in case of an emergency.
  A. standing by B. turning on C. getting on D. running on
  【解析】A 句意：有船只严阵以待，预防紧急情况。stand by 为不及物短语：to wait and be ready for action if needed 准备行动;待机;turn on 打开;get on进展;run down撞倒。根据句意，B 、C、D 三项均不符合。
  3. You _____only half the price ,how would the seller sell the jacket to you ?
  A. spent B. paid C. charged D. offered
  【解析】D句意：你仅出半价，店员怎么会把这件夹克卖给你呢?offer: to say that you will pay a particular amount of money to buy something 出价六万英镑买这所房子。 Charge(收费)不符合题意。抚讲价(offer)而后才能药费(sp end)或支付(pay)帮A、B两项不合常理。
  4. He _____the problem _____in his mind for a whole week before he did anything about it.
  A. switched; on B. kicked; up C. turned;  over D. took; on
  【解析】C句意：在采取措施之前，他在脑中将这个问题反复思考了一个星期。turn over :to think about carefully仔细考虑;switch on把开关打开;kick up引起;take on呈现、雇用、承担。
  5. At times the balance in nature is ______ , resulting in a number of possibly unforeseen effects.
  A. troubled B. confused C. disturbed D. puzzled
  【解析】C trouble主要指遇上难解决的问题而使人苦恼、忧虑;puzzled 指人是困惑的，因此将A、D两项排除;根据句意，自然的平衡本身并不是混乱的(confused),而不受到了人为的干扰(disturbed),才会导致不可预见的影响。因此选择C项。
  6. — So, how is your new roommate ?
  — She really ____. She always making loud noises at midnight and when I remind her , she always makes rude remarks.
  A. turns me over B. turns me down C. turns me off D. turns me out
  【解析】C turn sb.over :把……移交，把……交给;turn sb. down:拒绝;turnsb.off :使对(某人)感到厌烦、使不感兴趣;turn sb.out:驱逐，赶走。根据句意“她总是在午夜弄出很大的响声，我提醒她时，她还总是说些粗鲁的话”，由此可知她是使我烦透了，选择C项。

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