You were here yesterday.
Were you here yesterday?
You weren't here yesterday.
Where were you yesterday?
Who was here yesterday?
When were you here?
I ate bread this morning.
did I eat bread this morning?
I didn't eat bread this morning.
What did I eat this morning?
Who ate the bread this morning?
When did I eat the bread?
In the past,there was nobody to ask questions.
I did such homework by myself when i was a child.
I saw a lot of such questions these days.