I've been studying English since 12.

I've been studying English since 12. — Mum, I’ve been studying English since 8 o’clock. _______ I mom,i've been studying English since 8 o'clock.( ) i go out —Mum,I've been studying English since 8 o'clock.( )I go out —Mum, I’ve been studying English since 8 o’clock. ________ I —Mum, I’ve been studying English since 8 o’clock. ____ I go ----Mum,I've been studying English since 8 o'clock.________ — Mum, I’ve been studying English since 8 o’clock. ____ We've been studying English since five years ago(提问） I have been studying English since I was five (对since I was I have been studying English since I was five (对化线部分提问) I have been studying English (since i was eibht years old) (