YOU SAID:
I dont think i should have to go to karate when i dont want to because its not beneficial
INTO JAPANESE
私はしたくないときに空手に行かなければならないと思う
BACK INTO ENGLISH
I think i have to go karate when i don't want to
INTO JAPANESE
私はしたくないときに空手に行かなければならないと思います
BACK INTO ENGLISH
I think i have to go karate when i don't want to
Okay, I get it, you like Translation Party.