Mr Green is an American和Mr Green is merican什么区别?

Mr Green is an American和Mr Green is merican什么区别? Mr.Green is an American.改为同义句.Mr.Green（）（）American. mr Green is an english teacher否定句 Mr Green is an English teacher怎么改成一般疑问句 This is Mr Green mr.green is mrs.green is （ ） I don't like Mr.Green,because he is an old man 这里的an old Is mr green your u_____? Hong kong is an s_____of china根据首字母填空还有个Mr Green is Mrs green's h_____ This is Mr Green's room.Mr green's画线 My English teacher is Mr Green.对Mr Green提问 Mr.green is an English teacher.He wears glasses.合并为一句 ( ) is giving talk on TV?Mr.Green,an American teacher 速回答! an American writer,Mr Green once said. She told me____her teacher.A Mr Green isB that Mr Green is C if Mr Green wasD Mr Green was Mr.Green is a/an extremely strict teacher中的介词是用a还是an?直接就进原则吗？ ( )Mr.Green( )an old coat or a newone A.Are,wear B.Is,wear c.Is,wearing D.Are,wearing Mr.Green is used to____(work) hard.