Learn - учить самому, выучить и узнавать что-то новое

Teach - учить кого-то

Study - изучать, учиться в широком смысле

learn

If you finished a book, you would say "I finished reading this book," you wouldn't say you learned the book. If you became fluent in English you would say "I have become fluent in English" or "I can now speak English fluently" you wouldn't say you finished learning English.

Спасибо еще раз.

learn