TO-V:want,need,try,refuse,promise,hope,would like,start,begin,decide,agree,like,disagree,learn,prefer,remember,forget,..
V_ING:like,love,enjoy,dislike,hate,detest,practice,finish,stop,begin,start,avoid,keep,miss,stop,suggest,mind,feelike,imagine,continue,..
V_:can,could,should,must,ought to,have to.will,may,might,would,shall,used to,had better,be able to,would rather,..