不定冠词的用法①泛指—类人或物
Thisisapencilcase
②指不具体的某个人或物
ImetanoldmanOnmywayhome
③用在序数词前,相当于another
There’sathirdboyneartheshop
④表示“每—(个)”,相当于every
Theyhavemusiclessonstwiceaweek
givealessontakeabathhavearest教(一堂)课洗(个)澡休息haveatalkhaveafeverhaveagoodtime听报告发烧过得愉快have(take)awalkhaveaheadachehaveanicetrip散步头疼旅途愉快alotof,alot,alittle,afew,aglassof,sucha/an,haveawordwith,havealook,haveatry,haveaswim,aquarter,halfanhour,threetimesaday,haveatalk,giveatalk,tenYuanakilo