YOU SAID:

i was doing my homework and suddenly a giant dinosaur came and ate my dad's right foot

INTO JAPANESE

宿題をしていたら、突然巨大な恐竜がやってきて、父の右足を食べた

BACK INTO ENGLISH

When I was doing my homework, suddenly a huge dinosaur came and ate my father's right foot

INTO JAPANESE

宿題をしていると、突然、巨大な恐竜がやってきて、父の右足を食べました

BACK INTO ENGLISH

When I was doing my homework, suddenly a huge dinosaur came and ate my father's right foot