Mike is English.为什么中间不加冠词

Mike is English和Mike is an English那个对?那为什么对？为什么不对？ Mike is an English.和Mike is English.这两句话为什么不对? Mike is an English Mike is English.为什么中间不加冠词 Mike is a english boy怎么修改 mike is a English boy .(怎么修改?) Mike（人名） is English 急 Mike is an English boy.Mike is from ( ).A.AmericaB.CanadaC.EnglandD.Australia Mike is not good at English（改成同义句） English,is,but,he,mike,China,likes连词成句 Mike is reads an English book哪里错了 Mike is notgood at English.(改同义句) Your English is very good中为什么要加is MiKe,____that in English Mike teach English 改错 mike is very good at english,so he often speaks english in p English is widely used中widely为什么不能改成形容词? Is it Mike?这句话为什么不用he呢?具体问句在人教版六年级上册英语书中recycle2 中有.