YOU SAID:

I want to go to the party at my friend's house after school today because it will be sick!

INTO JAPANESE

今日は放課後、友達の家で病気になるのでパーティーに行きたいです！

BACK INTO ENGLISH

I'm sick at my friend's house after school today so I want to go to a party!

INTO JAPANESE

今日は放課後友達の家で具合が悪いのでパーティーに行きたい！

BACK INTO ENGLISH

I'm sick at my friend's house after school today so I want to go to a party!