can,could,may,should,might,must,ought,need,have,let,make等词后跟原形,HELP也可以跟原形,大部分情态动词后跟原形.want,would like,like,love,be going to,go on,hate,begin,continue,start,ask,tell,afford,agree,aim,appear,arrange,believe,care,choose,claim,come,consent,dare,decide,demand,desire,determine,decline,expect,elect,fail,offer,happen,seem,refuse,wait,pretend,promise,wish,hope,mean,long,learn,seek,intend,tend,manage,prepare,remember,forget,plan.等可以用与接不定式,但其中有些词也可以接别的形式,比如动名词等形式．
可以用于”动词＋宾语＋不定式”的词．
advise,allow,appoint,believe,cause,compel,consider,drive,get,guess,invite,judge,know,report,select,state,trust,intend,say,teach,want,beg,warn,expect,intend,pretend,understand,order,send,remind,judge,like,find,force,forbid,encourage.等词可以用于次结构.