【练习】
1. It’s said that the Olympic Games _____(hold) ?in London in 2012 will cover more events than any other Olympics did.（填空练习）
答案：to be held
解析：hold与the Olympic Games之间是被动关系,且2012奥运会尚未举办,应用不定式表将来。
2. ??I listened to the wind, ______ that he would not cometonight.
A. thinking ? ?B. to think ? ?C. thought ? ?D. being thinking答案：?A
解析：?分词作伴随状语.如填C, 前面应有and.不定式表目的或结果,句子意思不通.D 为不正确的表达.
3.?The boy lay on his back, his teeth______and his glaring eyes??______.
A.set；looked ? ? ? B.set；looking??
C.setting；looked ? ? D.setting；looking
答案：?B
解析：独立主格结构在句中作伴随状语, teeth 与set两个词之间含有逻辑上的被动关系,所以用过去分词；look这一动作是eyes所发出,所以用looking。
4.?All the thing??______，his proposal is of greater value than yours.
A.considered?? B.considering?? C.to consider?? D.consider
答案： ?A
解析：?独立主格结构在句中作状语,因为things与consider之间含有被动关系,所以用过去分词。
5.?? ______who she was, she said she was Mr.Johnson"s friend.
A.Asking?? B.Asked?? C.To be asked?? D.When asking答案：??B
解析：分词短语作状语,因为ask与句子的主语（she）之间有被动关系,所以用过去分词。
6.?A doctor can expect _____ (call) at any hour of the day or night.?（填空练习）
答案：?to be called
解析：?expect后跟不定式作宾语,call与doctor之间是被动关系。
【小知识】动词不定式的基本用法
（1）作宾语：
①作及物动词的宾语，如：She wishes to be a musician.
②作某些形容词的宾语：可以有动词不定式为宾语的形容词一般有glad， sorry，afraid，pleased， determined， willing，eager， anxious， ready， sure等，如：I am determined to give up smoking.
③动词不定式一般不作介词的宾语，但动词不定式之前如有疑问词时，就可作介词的宾语，如：Can you give us some advice on what to do next?
（2）作宾语补足语，如：Tell the children not to play on the street. 如果句中的谓语动词为see， hear，watch， notice， have，make， let等，作宾语补足语的动词不定式须将to省去，如：I saw a little girl run across the street. ?
