不要混淆祈使句与非谓语动词.doc

不要混淆祈使句与非谓语动词有这样一道语法考题，该用动词原形？还是用非谓语动词？_ the road round to the right and youll find his house. A. Follow B. Following C. To follow D. Followed【分析】此题容易误选B或C，许多同学一看选项就想当然地认为，选现在分词表示时间或伴随，选不定式表目的。此题的关键是要注意句中的连词and，它表明整个句子是一个并列句，即 and 前后应各是一个独立的句子，而不应是一个非谓语形式的短语，所以此题的正确答案应选A，即 and 前是一个祈使句。比较以下两题：(1) _ the road round to the right, she found his house. A. Follow B. Following C. To follow D. Followed【分析】此题应选B，现在分词短语表时间。(2) _ the road round to the right, the blind man asked a boy to guide him.A. Follow B. Following C. To follow D. Followed【分析】此题应选C，不定式短语表目的。注意以下各题均应选A，均因为句中的并列连词 and（填空句为祈使句）：(1) _ the milk and set a good example to the other children. A. Drink B. To drink C. Drinking D. Having drinking(2) _ me, and dont just stand there laughing. A. Answer B. To answer C. Answering D. To be answering(3) _ me , and then try to copy what I do. A. Watch B. Watching C. To watch D. Have watching(4) _ through this book and tell me what you think of it. A. Look B. Looking C. To look D. Having looked(5) _ it with me and Ill see what I can do.A. Leave B. Leaving C. If you leave D. When left注：有时可能不用连词，而用破折号（答案均选B，填空句为祈使句）。如：(1) _ down the radio the babys asleep in the next room.A. Turning B. Turn C. Turned D. To turn (2) _ some of this juice perhaps you will like it.A. Trying B. Try C. To try D. Having tried以下各题也应选A，是因为句中的从属连词 when, before, until 等（填空句为祈使句）：(1) _ left when you get to the end of the street. A. Keep B. Keeping C. To keep D. Kept(2) _ you hand over your mouth when you cough. A. Put B. Putting C. To put D. To be putting(3) _ him enough time to get home before you telephone. A. Give B. To give C. Giving D. Given(4)_ until the lights have turned to green. A. Wait B. To wait C. Waiting D. Having waited(5) _ the pieces of cloth with