YOU SAID:

went to bed and hit his head and couldn't get up in the morning

INTO JAPANESE

ベッドに行って頭を打って朝起きれなかった

BACK INTO ENGLISH

I went to bed and hit my head and couldn't get up in the morning.

INTO JAPANESE

私は寝て頭を打ち、朝起きることができなかった。

BACK INTO ENGLISH

I went to bed and hit my head and couldn't get up in the morning.