I am a student studying in a medicine university. 这句话有错误么?

Are you a American student?I am study in USA,I want ask you some question. hello,i am a master student ,i am interested in spanish,i can help you study chinese I am a student, my duty is study hard.中文是什么意思? I am a student是什么意思 i am being a student. I am a student.对还是I am student. i am still a student,can i join the team ,i will try my best to study. I am ( ) student A:a B:an I am a student （） a school. I am a student.改为一般疑问句 i am a student.改成疑问句 I am a student是什么时态 i am a student 什么时态? I am a student 做一般疑问句 I am good a student I am a good student 哪个对 理由I am good a student I am a good student 哪个对 理由 I ‘am a student 一般一问句 I am a student,_______I?翻译疑问句 I am a (student) 变复数