I am study in Grade 8 at PingHu Middle School为什么用at不对丫?不是study at a school studying是我打错了,但是怎么有两种分极的答案?

I am study in Grade 8 at PingHu Middle School为什么用at不对丫?不是study at a school studying是我打错了,但是怎么有两种分极的答案?
I am study in Grade 8 at PingHu Middle School
为什么用at不对丫?不是study at a school
studying是我打错了,但是怎么有两种分极的答案?

I am study in Grade 8 at PingHu Middle School为什么用at不对丫?不是study at a school studying是我打错了,但是怎么有两种分极的答案?
注意at school 是个词组,意思是“在校学习”
而你的句子主要错误是动词study的用法,应该写成studying.
你的整句话应该改为：
I am studying in Grade 8,PingHu Middle School.