YOU SAID:

Why do i have to drink when i eat?

INTO JAPANESE

なぜ私が食べたときに飲まなければならないのですか？

BACK INTO ENGLISH

Why should I drink when I ate?

INTO JAPANESE

私が食べたのに、なぜ私が飲むべきですか？

BACK INTO ENGLISH

But I have to eat, why should I drink?

INTO JAPANESE

しかし、私が食べている、なぜ私は飲むべきですか？

BACK INTO ENGLISH

However, I have to eat, why should I drink?

INTO JAPANESE

しかし、私が食べている、なぜ私は飲むべきですか？

BACK INTO ENGLISH

However, I have to eat, why should I drink?