YOU SAID:

I wouldn't be able to prepare you a cup of coffee

INTO JAPANESE

一杯のコーヒーを準備できません

BACK INTO ENGLISH

I can't prepare a cup of coffee

INTO JAPANESE

コーヒーを準備できません

BACK INTO ENGLISH

Can't prepare coffee

INTO JAPANESE

コーヒーを準備できません

BACK INTO ENGLISH

Can't prepare coffee