十分英文grammar

若你想說：我知道努力讀書會助我成功，但在我身上並不是這樣的話。
若你仔細思想，這句話有點矛盾，因為既然你以「努力讀書會助我成功」是事實的話，那麼就與「在我身上並不是這樣的話」產生衝突。
所以，你的句子應說：我知道努力讀書會助人們成功，但在我身上卻不是這樣
I know studying hard can help people to success, but it is never true for me.
(help someone to success就可以，無需help me access to success這樣累贅）
但你其實也可以這樣說：
I wonder whether studying hard can help me to success.
(我懷疑努力讀書是否可助我成玏）

i know studying hard would lead me to success but i've never tried.

"but I never be"
係想話個個人從來未努力過，還是永遠不會做到成功呢?
如果你想話個個人從來未努力過，the sentence should be: " I know studying hard can help me access to success, but I have never done it."

如果你想話個個人永遠不會做到成功, the sentence should be: " I know studying hard can help me access to success, but I will never be (successful)."