my biggest problem用上used to do和被动语态70词!

my biggest problem is that i used to be late for school,because my mother used to wake me up late.She used to think that I should learn to manage myself,including getting up timely everyday.I used to be blamed for my being late by my teacher.I even was laughted at by my classmates,because they thought i was too lazy .Now I am not what i used to be.I can remind myself to go to bed early at night and get up early in the morning,so I am often praised by my mom and teaher.