Mastered

A foreign language cannot be mastered in a year or so.

English cannot be mastered overnight.

Jim mastered French and German.

This is how I mastered English.

Uncontrolled, these forces may be dangerous and destructive, but once mastered they can be bent to man's will and desire.

I was pleased with the rapidity with which he mastered Japanese.

He mastered English easily.

What he was taught he mastered.

With all of his tricks he has mastered, he will be able to deal with any formidable client.

He mastered all he was taught.