YOU SAID:

Oh my gosh i just witnessed my neighbor's house burning

INTO JAPANESE

ああ、私の隣人の家が燃えているのを目撃しました

BACK INTO ENGLISH

Oh, witnessed my neighbor's house burning

INTO JAPANESE

ああ、隣人の家が燃えているのを目撃した

BACK INTO ENGLISH

Oh, I saw my neighbor's house burning

INTO JAPANESE

ああ、隣人の家が燃えているのを見た

BACK INTO ENGLISH

Oh, I saw my neighbor's house burning