YOU SAID:

karissa is the worst thing that happened to the kalina's

INTO JAPANESE

カリッサは、カリーナの脳に起こった最悪の事態である

BACK INTO ENGLISH

Carissa is the worst thing that has ever happened to Carina's brain

INTO JAPANESE

カリッサはカリーナの脳に起こった最悪の事態だ

BACK INTO ENGLISH

Carissa was the worst thing that ever happened to Carina's brain.

INTO JAPANESE

カリッサはカリーナの脳に起こった最悪の事態だった

BACK INTO ENGLISH

Carissa was the worst thing that ever happened to Carina's brain.