I am very clever,aren't 语法上有错吗

I am very clever,aren't 语法上有错吗 I am very selfish ,aren't ” I am very clever. I am missing you语法有错吗 i am very happy that i can write to you 这句话语法上有没错 有错的话正确的是什么 i am right,aren't 这句话成立吗 . I think they’re all very beautiful ,aren’t they?这句话的语法对吗? I am a student,aren't i find i am very clever的另一种说法 i am sure he understands__you feel.he is very clever. I am very clever a boy还是I am a very clever boy?哪种说法对?为什么? I am five years than you,aren't I