Never should. 
Shouldn't ever.
Should do all the time.
Two women drinking from a water fountain in their school.
We've found our plan to be all but worthless since it's so hard to find covered doctors.
A beagle and young child are wearing tags with the same number on them.
A woman does not buy any balloons.
The girls are together.
The people in Washington will not be overthrown in a violent fashion.