They are all busily battering at Mrs. Inglethorp's door. 
Mrs. Inglethorp's door is being battered by several people.
There is no one at Mrs. Inglethorp's door.
A lot of the equipment is specific to the site or to what the project requires.
an animal is outside carrying a piece of bark
A person is on a bicycle.
I am sure that I will not be able to see either Mr. Brown or Jane Finn.
Retirement income is not effected by savings.
A boy rides a bike.