sorry sorry, so whats ur suggestion about this case man? when you type"In my opinion的文法沒錯,但語意不好,因為in my opinion一般只用在比較正式的文章或場合,例如大學論文的口述報告、法庭作證、或是比較正式的文書內" I really dont know what you try to say!Even the people who got education usually say this formal way to say it right? I am not try to fight but just cant get ur point lol!Or maybe u are ABC