質問: what is the difference between my heart just fluttered. and my heart suddenly fluttered. and my heart fluttered for no reason. ? what is the difference between my heart just fluttered. and my heart suddenly fluttered. and my heart fluttered for no reason. ?
回答: "my heart just fluttered." 多分3番の意味です。それだけ。 "my heart suddenly fluttered." ここは「just」は使わないでしょう。こうなったら: "my heart just suddenly fluttered." 5番の強調です。 "my heart just fluttered for no reason." ちょっと変わったんですが、多分3番です。それだけ、簡単に。でも、強調としても考えられます。