为什么不能说he is an english?

为什么不能说He is an English 为什么不能说he is an english? 为什么不能写He is an English? 为什么不能说he will leave after an hour?要用in an hour? what does he mean为什么不能说what is he mean为什么去掉he 可以说 what is mean 为什么不能说 how clever a boy he is 可以等于What a clever boy he is! He is an Englishman.为什么不是He is an English.可不可以He is a Chineseman. he is sitting in an armchair.有点怪!he is sitting in an armchair.请翻译一下,说一下为什么用in People believe that he is ill变被动语态变为被动语态It is believed that he is ill．（或：He is believed to be ill．为什么不能说He is believed that he is ill. Is there any correlation at all between success as a young person and success as an adult?120 engli He has____idea.it is _____good idea.A.an the B.the the C.an a为什么第二个空不能填the 七.年.级.（用括号内所给动词的正确形式完成短文）Bill Cray is an Australian boy.He ___1__(study) at Darwin School.His father is a worker.He __2___(work)in a big car factory.His mother ___3__(be) a teacher.She _____4__(teach) Engli He is American.I am English.为什么不能加冠词He is American.I am English.和He is an American.I am a Englishman.的中文是不是没有区别呢 He is an English Feeding animals is ____interesting work.请问为什么不能填an He is having an affair..为什么不说 He has an affair. 为什么不说he has gone 而说he is gone 什么是动词不定式?动词不定式为什么叫动词不定式?什么情况下需要用动词不定式？什么情况下不能用？比如说为什么我不能说“On the road of to learn english'” 而需要说“on the road of learning engli