I am (studying)in middle school.或 I am a student from a middle school.i hope you can sing the song have a nice 这句没看懂。。 I wish you happiness.(语法无误,但这样有些奇怪,可以改 I hope you can be happy every day. 而且这句话一般放在最后)
I hope I can be a singer someday when i grow up.或 i'd love/like to be a singer someday. 或 My dream is to become a pop singer. If i can do that或my dream come true), i m gunna be very happy if you can write a song for me.或 it s gunna be a great honor if you can write a song for me.
From:Love_Or_Hate