YOU SAID:

causing him to scream very loudly in pain or shock.

INTO JAPANESE

彼は痛みやショックで非常に大声で叫びました。

BACK INTO ENGLISH

He shouted very loudly in pain and shock.

INTO JAPANESE

彼は痛みとショックで非常に大声で叫んだ。

BACK INTO ENGLISH

He shouted very loudly in pain and shock.