请看下面一道题：_________ the road round to the right and you’ll find his house. A. Follow                B. Following               C. To follow             D. Followed
思路分析：此题容易误选B此题或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
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 don’t 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         &nbSsp;       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
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 baby’s 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.EIGHT: 20pt; mso-char-in 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      &ont-weight: normal">B. To wait                 C. Waiting                D. Having waited(5) _________ 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，即填空句为祈使句：

(1) Don’t give me a long account, just _________ the plain facts. A. tell                        B. telling                    C. to tell                    D. to be telling(2) First _________ the rice by washing it, then _________ it in boiling water. A. prepare, cook         B. preparing, cooking   C. preparing, cook    D. prepare, cooking(3) Don’t sit there watchops: 115.5pt 210.0pt 30ing — _________ and help me! A. come                    B. coming                    C. to come                D. to be coming(4) Don’t waste your money on silly things — _________ it. A. save                     B. to save                     C. saving                   D. having saved(5) 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      &unt: nbsp;               D. to be putting但是，以下各题情形有所不同，所填部分为目的状语(用不定式，即答案均为B)：(1) _________ late in the morning, Bob turned off the alarm.A. Sleep                 &-FAMILY: 'Times New Roman'">A.B. To sleep                   C. Sleeping                  D. Having slept(2) _________ the early bus, Mr Smith got up at six.A. Catch                   B. To catch                   C. Catching                 D. Having caught