He'is( )English.为什么不用加冠词?另外意思是啥?

为什么不能说He is an English 为什么不能说he is an english? 为什么不能写He is an English? Jack is English.He is an English boy.为什么第一个English不用冠词? He is American和she is English 我在牛津英语上看到的,不宁白为什么不加a? He is an Englishman.为什么不是He is an English.可不可以He is a Chineseman. He is ( )English teacher He is good ( ) English. He is an English Jack is very interested in English and music.A so he is so you are B so he is so are youJack is very interested in English and music.A so he is so you are B so he is so are you选B,翻译成他也是,你也是为什么不可以写错了，C so is he he can't speak english .为什么speak不加s he has been an english teacher for 20 years,so he is a(n) ____teacher.a.seasoned b.experienced 为什么不选B he is our English teacher in this term 和 he is our English teacher this term为什么前者正确? He is English对English提问 有没有he is the English或he is English He is good at music 为什么要加is?He knows a lot of English.这句为什么没有is? He is( )the English club he is a english和he is english区别he is a english和he is english 区别