"Amadeus" around 01:17:56-01:18:24/03:00:25
LEOPOLD: Is she not here?
MOZART: No, she had to help her mother.
She's like that.
Her mother's a very sweet woman, you'll-- I didn't know you were home. Stanzi, this is my father. We'll wait. We'll wait.
1 Why did Mozart use "had" when talking about the present regularity? ("She's like that.")
2 Can I say "I didn't know you are home" in this scene? Compared with "I didn't know you were home", which one is better?