Learn from or by?

[Dawood Usmani]

Hi teachers!
I would like to know which preposition goes with " learn"?
1- I learnt English from Sir Ali.
2- I learnt English by Sir Ali.
3- I learnt English to Sir Ali.

Which of the above mentioned is correct?
Best regards!
Dawood

[Naamplao]

Hi teachers!
I would like to know which preposition goes with " learn"?
1- I learnt English from Sir Ali.
2- I learnt English by Sir Ali.
3- I learnt English to Sir Ali.

Which of the above mentioned is correct?
Best regards!
Dawood

"learnt" is not used very often as the past tense of "to learn". "Learned" is much better.

I learned English from Sir Ali.