YOU SAID:

my mom found my sister after she was hit by a car

INTO JAPANESE

車にはねられた後、母は妹を見つけた

BACK INTO ENGLISH

After being hit by a car, my mother found her sister

INTO JAPANESE

車にはねられた後、母は妹を見つけた

BACK INTO ENGLISH

After being hit by a car, my mother found her sister