YOU SAID:

i watched him die and i smiled with joy

INTO JAPANESE

私は彼が死ぬのを見て喜びに微笑んだ

BACK INTO ENGLISH

I smiled with joy to see him die

INTO JAPANESE

私は彼が死ぬのを見てうれしそうに微笑んだ

BACK INTO ENGLISH

I smiled happily to see him die

INTO JAPANESE

私は彼が死ぬのを見てうれしそうに笑った

BACK INTO ENGLISH

I laughed with joy at seeing him die

INTO JAPANESE

私は彼が死ぬのを見てうれしそうに笑った

BACK INTO ENGLISH

I laughed with joy at seeing him die