YOU SAID:
I have decided to not go to the party
INTO JAPANESE
私はパーティーに行かないことにしました
BACK INTO ENGLISH
I decided not to go to the party
INTO JAPANESE
彼はパーティーに行かないことに決めた。
BACK INTO ENGLISH
He decided not to go to the party.
INTO JAPANESE
彼はパーティーに行かないことに決めた。
BACK INTO ENGLISH
He decided not to go to the party.
Come on, you can do better than that.