1.I got back to school without my keys and my backpack.
改成：
I went back to school without my keys and my backpack.
2.On Sundays I'm very exhuasted because I often stay up real late.
改成：On Sundays I'm very exhuasted because I often stay up really late.
3.I made some flashcards to remember as much words as I could
改成：
I made some flashcards to remember as many words as I could