Could you teach me the correct way to say it so that I don't make the same mistake again?
I don't want to make the same mistake twice, so could you teach me the correct English expression?
「次失敗しないために、正しい英語を教えてください」= Could you teach me the correct way to say it so that I don't make the same mistake again? / I don't want to make the same mistake twice, so could you teach me the correct English expression?
ボキャブラリー
teach = 教える
correct = 正しい
way to say it = 言い方、表現
expression = 表現、フレーズ
make the same mistake twice/again = 同じミスを繰り返す・同じ間違いを繰り返す
could you ~ = ~してくれる?