不要混淆祈使句与非谓语动词

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？_________theroadroundtotherightandyou’llfindhishouse.A.FollowB.FollowingC.TofollowD.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)_________theroadroundtotheright,shefoundhishouse.A.FollowB.FollowingC.TofollowD.Followed【分析】此题应选B，现在分词短语表时间。(2)_________theroadroundtotheright,theblindmanaskedaboytoguidehim.A.FollowB.FollowingC.TofollowD.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)_________themilkandsetagoodexampletotheotherchildren.A.DrinkB.TodrinkC.DrinkingD.Havingdrinking(2)_________me,anddon’tjuststandtherelaughing.A.AnswerB.ToanswerC.AnsweringD.Tobeanswering(3)_________me,andthentrytocopywhatIdo.A.WatchB.WatchingC.TowatchD.Havewatching(4)_________throughthisbookandtellmewhatyouthinkofit.A.LookB.LookingC.TolookD.Havinglooked(5)_________itwithmeandI’llseewhatIcando.A.LeaveB.LeavingC.IfyouleaveD.Whenleft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)_________downtheradio—thebaby’sasleepinthenextroom.A.TurningB.TurnC.TurnedD.Toturn(2)_________someofthisjuice—perhapsyouwilllikeit.A.TryingB.TryC.TotryD.Havingtried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)_________leftwhenyougettotheendofthestreet.A.KeepB.KeepingC.TokeepD.Kept(2)_________youhandoveryourmouthwhenyoucough.A.PutB.PuttingC.ToputD.Tobeputting(3)_________himenoughtimetogethomebeforeyoutelephone.A.GiveB.TogiveC.GivingD.Given(4)_________untilthelightshaveturnedtogreen.A.WaitB.TowaitC.WaitingD.Havingwaited(5)_________thepiecesofclothwithaloosestitchbeforefinallysewingthemtogether.A.JoinB.TojoinC.JoiningD.Joined