YOU SAID:

i will kill myself tomorrow, but before that i need to buy a cat

INTO JAPANESE

明日は自殺しますが、その前に猫を買う必要があります

BACK INTO ENGLISH

I will commit suicide tomorrow, but before that I have to buy a cat

INTO JAPANESE

明日は自殺しますが、その前に猫を買わなければなりません

BACK INTO ENGLISH

I will commit suicide tomorrow, but before that I have to buy a cat