If
Sufficient
When
Sufficient
Whenever
Sufficient
Every
Sufficient
All
Sufficient
Any
Sufficient
People who
Sufficient
In order to
Sufficient
Then
Necessary
Only
Necessary
Only if
Necessary
Must
Necessary
Required
Necessary
Unless
Necessary
Except
Necessary
Until
Necessary
Without
Necessary
Unless (except, until, without)
1) Term modified becomes necessary condition
2) Remaining term negated and becomes sufficient condition
Must be False
Cannot be True
Not Necessarily False
Could be True
Could be False
Not Necessarily True
Cannot be False
Must be True