Timetable
Unreal Present
Emphasis on recepient of action
Present with reference to past
Present process
Present-Future
Arrangements
Real Possibility
Future plans
Emphasis on receiver of action
Emphasis on result in present
Hypothetical situation
Past
Deduction of certainty (I'm sure it is)
Past discovery
Deduction of certainty (I'm sure it was not)
Present
Present with continuity from past
Future
Emphasis on prolongation of action