Как переводится неправильная форма глагола fall

Fall - падать fell - упал

Перевод этого неправильного глагола- падать

1.  since i have known him, he has  always been a hardworking person.  2. since i met him, he has  always been a good friend to me.  3. since paul came to this city, he has  changed three jobs.  4. since the time  he has been here, he has quarelled with all the neighbours.  5. since  he has been  here, he has visited all the museums of the city.  6. since he arrived in spain, he has visited all the sights of this country.  7. kate has changed for the time since we haven't seen each other.  8. kate has changed a lot since we saw each other last time.  9. i haven't been driving this car since i had an accident.  10. since the  time this house has belonged to us, we have done its complete repairment  three times.(/have repaired it three times)

Small-smaller-the smallest, young-younger-the youngest, thin-thiner-the thinest, thick-thicker-the thickest,tall-taller-the tallest, fine-finer-the finest, new-newer-the newest, easy-easier-the easest, busy-basier-the basest, dirty-dirtier-the dirtest, famos-famoser-famosest, beautiful-more beautiful-the most beautiful, difficult-more difficult-the most difficult, comfortable- more comfortable-the most comfortable, expensive-more expensive-the most expensive  , good-better-the best, bad-worse-the worst, little-littler-the littest, many-more-the most