I have a feeling that I will quickly become proficient in English if I continue to learn from you.
こんにちは!
ご質問ありがとうございます。
ご質問について、いくつか言い方が考えられますが、例えば、
I feel I will quickly become proficient in English if I continue to learn from you.
または、
I have a feeling that I will quickly become proficient in English if I continue to learn from you.
とすると、『あなたに教わり続ければすぐに上手くなる[気がする](https://eikaiwa.dmm.com/uknow/questions/186/)』と言えます。
役に立ちそうな単語とフレーズ
learn from someone 人から学ぶ
参考になれば幸いです。
I feel like I could get pretty good at English if I keep studying with you.
I get the feeling my English is really going to improve if I keep taking lessons with you.
この場合、次のような言い方ができますよ。
ーI feel like I could get pretty good at English if I keep studying with you.
「あなたと英語を勉強し続けたら、英語が上手になりそう」
I feel like I could get pretty good at ... で「…が上手になりそう」と言えます。
ーI get the feeling my English is really going to improve if I keep taking lessons with you.
「あなたのレッスンを受け続けたら、英語がすごく上達しそうな感じがする」
I get the feeling ...を使っても言えます。
ご参考まで!