请看下面这道题，是考查祈使句还是考查非谓语动词？
_______ the road round to the right and you’ll find his house.
A. Follow B. Following
C. To follow D. Followed
【分析】正确答案选A。根据句中的连词and 可推知它是一个并列句。假若将此题改为下面这样，则答案为B：
_______ the road round to the right, you’ll find his house.
A. Follow B. Following
C. To follow D. Followed
但是，若改成下面一题这样，则答案为C(不定式短语表目的)：
_______ the road round to the right, the blind man asked a boy to guide him.
A. Follow B. Following
C. To follow D. Followed
请做以下试题，答案均选A，都是因为句中的并列连词 and（填空句为祈使句）：
(1) _______ to the top of the hill, and you can see the whole of the town.
A. Get B. To get
C. Getting D. Having got
(2) ______ the milk and set a good example to the other children.
A. Drink B. To drink
C. Drinking D. Having drinking
(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 I’ll see what I can do.
A. Leave B. Leaving
C. If you leave D. When left
有时不用连词连接句子，而用破折号，情况也是一样(答案均选A)。如：
(6) _____ down the radio ― the baby’s asleep in the next room.
A. Turn B. Turning
C. to turn D. To have turned
(7) _____ some of this juice ― perhaps you will like it.
A. Try B. Trying
C. To try D. To have 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）：
(8) ______ him enough time to get home before you telephone.
A. Give B. To give
C. Giving D. Given
(9) ______ left when you get to the end of the street.
A. Keep B. Keeping
C. To keep D. Kept
(10) ______ your hand over your mouth when you cough.
A. Put B. Putting
C. To put D. To be putting
(11)______ until the lights have turned to green.
A. Wait B. To wait
C. Waiting D. Having waited
(12) ______ the pieces of cloth with a loose stitch before finally sewing them together.
A. Join B. To join
C. Joining D. Joined
以下各题也应选A，因为填空句为祈使句(from www.yygrammar.com)：
(13) I don’t want to listen a long story ― just _____ me the result.
A. tell B. telling
C. to tell D. to be telling
(14) Why stand there watching ― _____ and help us!
A. come B. coming
C. to come D. to be coming
(15) Don’t waste your money on silly things ― ______ it.
A. save B. to save
C. saving D. having saved
(16) First ______ the rice by washing it, then ______ it in boiling water.
A. prepare, cook B. preparing, cooking
C. preparing, cook D. prepare, cooking
(17) To test eggs, _____ them in a bowl of water: if they float they’re bad, if they sink they’re good.
A. put B. putting
C. to put D. to be putting
但是请注意，类似下面这样的题目情形有所不同，所填部分为目的状语（用不定式，即答案选B）：
(18) ______ French well, she went to France to live with his cousins.
A. Study B. To study
C. Studying D. Having studied
(19) _____ late in the morning, Mr. Smith turned off the alarm.
A. Sleep B. To sleep
C. Sleeping D. Having slept
(20) ______ the flies out, we had to shut all the doors and windows.
A. Keep B. To keep
C. Keeping D. Having kept
(21) ______ their service, the workers of the hotel are active in learning English.
A. Improving B. To improve
C. Improve D. Having improved