初中英语知识点精讲课程Its+adj.+(forsb.)+todosth.情境导入Itsimportanttobeontime.Itsimpoliteforustokeepotherswaiting.知识讲解Itsimportanttobeontime.Itsimpoliteformetokeepotherswaiting.Its + adj. + (for sb.) + to do sth. (对某人来说)做是Its easy (for me) to learn English.To learn English is easy (for me).知识讲解e.g.1.Itsimpolitetopointatotherswithyourfinger.2.Itsimportant(forher)toworkhard.3.Itsinteresting(forthem)toclimbmountains.典例精析(湖南长沙中考)Itsnecessaryforus_toourparentswhenwehaveproblems.A.totalkB.talkingC.talkA课堂小结Its + adj. + (for sb.) + to do sth. (对某人来说)做是It作形式主语，真正的主语是动词不定式