This is a useful Korean phrase for beginners.

Words

저 - I , me ( Pronoun )

한국말 - Korean language ( Noun )

못해요 - cannot do ( Conjugated Verb )

한국어 - Korean language ( Noun )

Phrases

저 한국말 못해요 - I can't speak Korean ( Informal polite )

저 한국말 잘 못해요 - I can't speak Korean very well. ( Informal polite )

저 한국말 잘해요 - I speak Korean well ( Informal polite )

저 축구 잘 해요 - I can play soccer very well ( Informal polite )

저 테니스 잘해요 - I can play tennis very well ( Informal polite )