精选优质文档-倾情为你奉上动词不定式讲与练动词不定式在句中可充当主语、表语、宾语、宾补、定语和状语等。一、作主语动词不定式作主语可位于句首。例如：To learn a skill is very important for everyone in todays society.也可使用it作形式主语，而将其置于句末。例如：It is necessary for young students to learn a foreign language.动词不定式作主语的常用句型有：1. It isadj./ n. (for sb.sth.) to do sth.用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。例如：It is interesting to play this game. It is necessary for you to ch
