She knew that her mother-in-law invariably kept all important papers in this particular case. 
Some important papers were kept by her mother-in-law.
She did not know about her mother-in-law keeping any papers.
The people are taking pictures.
I won't ask Boris at all.
An old man is sitting.
A woman about to eat ice cream.
I think I know where the papers are and to Jane Finn is.
The couple are holding hands.