fui eu quem convenceu o

I was the one who convinced

→ ser
phrase Rare #42,132
I was the one who convinced This construction emphasizes that the speaker was responsible for convincing someone. The final “o” is the masculine singular definite article before a person’s name or noun, as in “o Tom.”
PO: Fui eu quem convenceu o João a aceitar o trabalho.
EN: I was the one who convinced João to accept the job.

Fui eu quem convenceu o Tom a ensinar a Mary a fazer isso.

I was the one who convinced Tom to teach Mary how to do it.

Fui eu quem convenceu o Tom a parar de fazer aquilo.

I was the one who convinced Tom to stop doing that.

Fui eu quem convenceu o Tom que ele deveria aprender como fazer isso.

I was the one who convinced Tom that he should learn how to do that.

Fui eu quem convenceu o Tom a aprender a fazer isso.

I was the one who convinced Tom to learn how to do this.