She forgot to write him.
I forgot his phone number.
I forgot to call him today.
I forgot your phone number.
They forgot to lock the door.
I forgot to lock the storeroom.
He forgot to turn off the light.
I forgot to telephone him today.
I forgot that I met her last month.
I forgot the key and went back for it.
I forgot to put a stamp on the envelope.
I almost forgot that it was his birthday.
She forgot that she bought him a present.
I forgot to turn off the TV before going to bed.
She asked him to call her later, but he forgot to.
I completely forgot to make something for us to eat.
She forgot that she had promised to call him last night.
Last year, I spent so much time by myself that I almost forgot how to communicate effectively with others.