YOU SAID:

he beats his fists against the posts and still insists he sees the ghosts

INTO JAPANESE

彼は拳をポストに打ち負かし、それでも幽霊を見ると主張する

BACK INTO ENGLISH

He defeats the fist on the post and claims to still see the ghost

INTO JAPANESE

彼はポストで拳を打ち負かし、まだ幽霊を見ていると主張します

BACK INTO ENGLISH

He defeats the fist at the post and claims to still see the ghost

INTO JAPANESE

彼はポストで拳を打ち負かし、まだ幽霊を見ていると主張します

BACK INTO ENGLISH

He defeats the fist at the post and claims to still see the ghost