YOU SAID:

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

INTO JAPANESE

彼は拳をポストに押し付け、それでも幽霊を見ていると主張している

BACK INTO ENGLISH

He presses his fist against the post and claims to still see the ghost

INTO JAPANESE

彼は拳をポストに押し付け、まだ幽霊を見ていると主張します

BACK INTO ENGLISH

He presses his fist against the post and claims to still see the ghost