YOU SAID:
Why do we exist on this earth?
INTO JAPANESE
なぜ我々はこの地球上に存在していますか?
BACK INTO ENGLISH
Why have we exist on this earth?
INTO JAPANESE
なぜ我々はこの地球上に存在していますか?
BACK INTO ENGLISH
Why have we exist on this earth?
That didn't even make that much sense in English.