YOU SAID:

I have been drinking water for an obnoxiously long time.

INTO JAPANESE

私は不愉快に長い間水を飲んでいました。

BACK INTO ENGLISH

I was drinking water unpleasantly for a long time.

INTO JAPANESE

私は長い間不快な水を飲んでいました。

BACK INTO ENGLISH

I have been drinking unpleasant water for a long time.

INTO JAPANESE

私は長い間不快な水を飲んでいました。

BACK INTO ENGLISH

I have been drinking unpleasant water for a long time.