V+todo

　　long,want,expect,hope,wish,desire,refuse,agree,pretend,promise,aim,choose,decide,claim,demand,learn,manage,afford,happen,fail,seem,appear,intend,ask,beg,bother,hesitate,offer,threaten,volunteer…

　　V+wh-＋todo

　　know,decide,learn,remember,see,understand,explain,findout,wonder,think,discuss,guess,inquire,observe,show,tell…

　　V+it+todo

　　Find,think,feel,make,consider…

　　V+O.+todo

　　advise,allow,ask,assist,beg,bribe,cuase,direct,drive,enable,encourage,forbid,force,get,hate,help,inspire,instruct,intend,invite,lead,lioke,need,oblige,order,permit,persuade,prefer,recommend,remind,report,request,require,teach,tell,tempt,urge,want,warn,wish

　　arrangeforsbtodo,callon,callon,dependon,longfor,votefor,relyon,waitfor…

　　注意：Suggest,demand,hope,claim,agree无此句型

　　N.+todo

　　thefirsttocome,thenexttodo

　　theonlyonetodoit,

　　failure,plan,tendency,desire,decision,promise,wish,attempt,struggle,courage…todo