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第八讲 非谓语动词非谓语动词考点透析不定式、分词、动名词的否定式都是在其前面加 not/never。如：(1)Mrs.Smith warned her daughter never to drive after drinking. 史密斯夫人提醒女儿不要酒后开车。(2)Not knowing what to do，I went to the teacher for advice. 由于不知道该怎么办我去问老师有何建议。(3)I apologize to you for not telling you the truth immediately. 我没有立刻告诉你真相向你道歉。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、动名词的完成式表示动作在谓语之前发生。如：(1)When mother came into the room，Tom pretended to be working hard at his lessons. 妈妈走进房间时汤姆装作正在认真做功课。(2)Robert is said to have studied abroad，but I don't know what country he studied in. 据说罗伯特到国外留过学不过我不知道他在哪个国家学习过。(3)Having finished all my homework，I went out to play football with Li Ming. 在完成所有的作业后我和李明去踢足球4)The boy was severely punished by his father for having told lies. 这男孩因说谎受到他父亲严厉的惩罚。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。如：有五对可供选择可我不知道该买哪一4．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。如：t of work to do/to be done. | 
