第八讲 非谓语动词
考点透析
1.不定式、分词、动名词的否定式都是在其前面加 not/never。例如：
(1)Mrs.Smith warned her daughter never to drive after drinking.
(2)Not knowing what to do，I went to the teacher for adv ice.
(3)I apologize to you for not telling you the truth immediately.
2．不定式的进行时表示动作与谓语动作同时发生。不定式、分词、动名词的完成式表动作在谓语之前发生。例如：
(1)When mother came into the room，Tom pretended to be working hard at his lessons.
(2)Robert is said to have studied abroad，but I don't know what country he studied in.
(3)Having finished all my homework，I went out to play football with Li Ming.
(4)The boy was severely punished by his father for having told lies.
3．不定式作定语时，如果不定式是不及物动词，或者不定式所修饰的名词是不定式动作的工具、地点，不定式后就应有必要的介词。例如：
There are five pairs to choose from，but I'm at a loss which to buy.
4．不定式主动表被动的几种情况：
在 There be结构中，作定语的不定式既可用主动语态也可用被动语态。例如：
There is a lot of work to do/to be done.
不定式作定语时，如果不定式所修饰的名词是不定式的宾语，但是又可在句子中找到另一个词作不定式的逻辑主语，不定式要用主动语态。例如：
