YOU SAID:

So I wanted to go to this party, but my parents didn't let me because I am grounded.

INTO JAPANESE

だから私はこのパーティーに行きたかったが、私は根拠があるので両親は私を許さなかった。

BACK INTO ENGLISH

So I wanted to go to this party, but my parents wouldn't let me because I had grounds.

INTO JAPANESE

だから私はこのパーティーに行きたかったが、私には根拠があったので両親は私を許さなかった。

BACK INTO ENGLISH

So I wanted to go to this party, but my parents wouldn't forgive me because I had grounds.

INTO JAPANESE

だから私はこのパーティーに行きたかったが、私には根拠があったので両親は私を許さなかった。

BACK INTO ENGLISH

So I wanted to go to this party, but my parents wouldn't forgive me because I had grounds.