下列动词后面如果跟动词,必须跟动词的不定式：afford,agree,arrange,ask,attempt,appear,apply,beg,bother,challenge,choose,claim,command,care,dare,decide,demand,desire,determine,expect,endeavor,fail,guarantee,hope,hesitate,incline,long,learn,manage,offer,plan,pretend,promise,prepare,pledge,refuse,resolve,seek,strike,seem,threaten,trouble,tend,undertake,volunteer,venture,wish等

　　下列动词后面跟动词,只能跟动名词：admit,advise,acknowledge,advocate,avoid,appreciate,cannotresist,can'tstand,complete,confirm,consider,confess,defer,deny,discover,doubt,enjoy,escape,excuse,fancy,favor,feellike,finish,forbid,forgive,giveup,holdoff,involve,imagine,keep,leaveoff,looklike,mind,miss,mention,prohibit,putoff,postpone,practise,permit,prevent,quit,pardon,recall,resent,recommend,resist,risk,suggest等