YOU SAID:

i want to go to a party

INTO JAPANESE

パーティーに行きたいです。

BACK INTO ENGLISH

You want to go to the party.

INTO JAPANESE

君はパーティーに出なくてはならないよ。

BACK INTO ENGLISH

You have to go to the party.

INTO JAPANESE

君はパーティーに出なくてはならないよ。

BACK INTO ENGLISH

You have to go to the party.