1. Work will be easier after the holiday rush.
Main verb: will be
Tense: Future
Aspect: Simple
Mood: Indicative (stating a fact or prediction)
2. The class should have started a half-hour earlier.
Main verb: should have started
Tense: Past (refers to a past action that did not happen on time)
Aspect: Perfect
Mood: Modal (advisability or expectation)