I walked to school by my self.
myself
He didn't did laundry by himself.
do
They swim by themself.
themselves
She ate lunch by herself.
didn't eat
He cook by himself.
cooked
She stayed at home by herself
period (.)
He didn't washed his hair by himself.
wash
You bought groceries by yourself.
yourselves
The dogs got off the car by itself.
themselves
They take a bus by themselves.
took
She didn't walked by herself.
walk
The hamster chop vegetables by itself.
chopped
