忙しいので

because I’m busy

→ 忙しい
phrase Rare #28,580
because I’m busy 忙しい means “busy,” and ので means “because” or “since.” This phrase gives a reason in a relatively gentle or polite way; the subject is understood from context.
JA: 今日は忙しいので、また後で電話します。
EN: I’m busy today, so I’ll call you later.

忙しいので明日は来られないかも知れない

I'm busy, so I might not be able to come tomorrow.

彼女は今忙しいのであなたとお話できません

She’s busy right now, so she can’t talk to you.

父が忙しいので私が代わりに行きます

My father is busy, so I'll go in his place.

忙しいので行けない

I can't go because I'm busy.

私は非常に忙しいので読書する時間がない

I'm so busy that I don't have time to read.

忙しいのでパーティーに出られません

I’m busy, so I can’t attend the party.