YOU SAID:

my pen fell over could you please take it for me?

INTO JAPANESE

私のペンが倒れてしまいました、拾ってもらえませんか？

BACK INTO ENGLISH

My pen has fallen, could you please pick it up?

INTO JAPANESE

ペンが落ちてしまったのですが、拾ってもらえませんか？

BACK INTO ENGLISH

I dropped my pen, could you please pick it up?

INTO JAPANESE

ペンを落としてしまったので拾ってもらえますか？

BACK INTO ENGLISH

I dropped my pen. Could you please pick it up?

INTO JAPANESE

ペンを落としてしまいました。拾っていただけますか？

BACK INTO ENGLISH

I dropped my pen. Could you please pick it up?