YOU SAID:
john needs to go to swimming tonight
INTO JAPANESE
ジョンは今夜水泳に行く必要があります
BACK INTO ENGLISH
John needs to go swimming tonight
INTO JAPANESE
ジョンは今夜泳ぎに行く必要があります
BACK INTO ENGLISH
John has to go swimming tonight
INTO JAPANESE
ジョンは今夜泳ぎに行かなければならない
BACK INTO ENGLISH
John has to go swimming tonight
Okay, I get it, you like Translation Party.