摘要：[考例]--Linda, I am very thirsty. --Let's go to the nearest supermarket some drinks, OK? [重庆] A. buy B. bought C. to buy D. buying [答案]:C.[解析]考查不定式作目的状语的用法.句意为:“咱们去最近的超级市场买些饮料. In order the word a friendly place, one must show a friendly face.[乐山] A. makes B. making C. to make D. make [答案]:C.[解析]考查动词不定式作目的状语的特殊结构.in order to do sth.表示“为了-- 的意思.不定式作目的状语.故选C. 一There goes the bell． 一It's time for class. Let's stop .[福州市] A． talk B to talk C．talking D．not talk [答案]C[解析] 动词stop后既可接动词不定式作宾语.即:stop to do sth.也可以接动词的一ing形式作定语.即:stop doing sth.前者表示停下来做后面的动作.后者表示停止当前的动作.由语境“铃响了.到了上课时间.应停止交谈 可知.应选C项. [语法回顾]www.zk5u.co 动词不定式 动词不定式由“to+动词原形 构成.其主动式有一般式.进行时.完成式和完成进行式.其被动式.进行式和完成式.如下表: 时态\语态 主动 被动 一般式 to do to be done 完成式 to have done to have been done 动词不定式主动式的句法功能1.动词不定式作主语 当动词不定式作主语时.其谓语动词常用单数.例如: To say something is one thing; to do it is another.说是一回事.做是另一回事. To help animals is helping people./ It is very difficult to learn Chinese well.学好汉语是非常的困难)/ It took me half an hour to work out this problem.(解出这道题花了我一个小时的时间) 当动词不定式在句子中作主语时,通常使用it作形式主语而真正主语则是不定式或不定式短语.以使句子保持平衡.例如: It's so nice to hear your voice. 听到你的声音真高兴. It is not difficult to work out the problem.弄清这个节目的情况并不困难. It's very kind of you to help us. 他帮助我们.他真好. It's for sb.和 It's of sb. 这样的句子中.由于表语形容词性质的不同.导致了不定式逻辑主语标志用for或of的区别. 1)for sb. 句型中的形容词一般为表示事物的特征特点.表示客观形式的形容词.如easy, hard, difficult, interesting, impossible等:例如: It's very hard for him to study two languages. 对他来说学两门外语是很难的. 2)of sb句型中的形容词一般为表示性格.品德.心智能力.表示主观感情或态度的形容词.如good, kind, nice, clever, foolish, right.例如: It's very nice of you to help me. 你来帮助我.你真是太好了.

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