YOU SAID:

I was responsible for teaching the bass line all by myself.

INTO JAPANESE

私はベースラインをすべて自分で教える責任がありました。

BACK INTO ENGLISH

I was responsible for teaching all the baselines myself.

INTO JAPANESE

すべてのベースラインを自分で教える責任がありました。

BACK INTO ENGLISH

I was responsible for teaching all the baselines myself.