YOU SAID:

I have been to the top of the mountain

INTO JAPANESE

山の頂上に行ったことがあります。

BACK INTO ENGLISH

Have you been to the top of the mountain.

INTO JAPANESE

山の頂上にいます。

BACK INTO ENGLISH

At the top of the mountain.

INTO JAPANESE

山の上部。

BACK INTO ENGLISH

At the top of the mountain.