YOU SAID:

if a bird killed my pen i will be down

INTO JAPANESE

鳥が私のペンを殺した場合、私はダウンします

BACK INTO ENGLISH

If the bird killed my pen, I would go down

INTO JAPANESE

鳥が私のペンを殺した場合、私は降ります

BACK INTO ENGLISH

If the bird kills my pen, I get off

INTO JAPANESE

鳥が私のペンを殺すと、私は降ります

BACK INTO ENGLISH

When the bird kills my pen, I get off

INTO JAPANESE

鳥が私のペンを殺すとき、私は降ります

BACK INTO ENGLISH

I get off when the bird kills my pen

INTO JAPANESE

鳥が私のペンを殺すと私は降ります

BACK INTO ENGLISH

I get off when the bird kills my pen