I'd be lessoning you'd be lessoning he'd be lessoning we'd be lessoning you'd be lessoning they'd be lessoning
Perfect
I should've lessoned you should've lessoned he should've lessoned we should've lessoned you should've lessoned they should've lessoned
V-ing perfect
I should've been lessoning you should've been lessoning he should've been lessoning we should've been lessoning you should've been lessoning they should've been lessoning
Negation
Simple form
I shouldn't lesson you shouldn't lesson he shouldn't lesson we shouldn't lesson you shouldn't lesson they shouldn't lesson
V-ing form
I shouldn't be lessoning you shouldn't be lessoning he shouldn't be lessoning we shouldn't be lessoning you shouldn't be lessoning they shouldn't be lessoning
Perfect
I shouldn't have lessoned you shouldn't have lessoned he shouldn't have lessoned we shouldn't have lessoned you shouldn't have lessoned they shouldn't have lessoned
V-ing perfect
I shouldn't have been lessoning you shouldn't have been lessoning he shouldn't have been lessoning we shouldn't have been lessoning you shouldn't have been lessoning they shouldn't have been lessoning
Interrogative form
Simple form
should I lesson? should you lesson? should he lesson? should we lesson? should you lesson? should they lesson?
V-ing form
should I be lessoning? should you be lessoning? should he be lessoning? should we be lessoning? should you be lessoning? should they be lessoning?
Perfect
should I have lessoned? should you have lessoned? should he have lessoned? should we have lessoned? should you have lessoned? should they have lessoned?
V-ing perfect
should I have been lessoning? should you have been lessoning? should he have been lessoning? should we have been lessoning? should you have been lessoning? should they have been lessoning?
Interro-negative form
Simple form
shouldn't I lesson? shouldn't you lesson? shouldn't he lesson? shouldn't we lesson? shouldn't you lesson? shouldn't they lesson?
V-ing form
shouldn't I be lessoning? shouldn't you be lessoning? shouldn't he be lessoning? shouldn't we be lessoning? shouldn't you be lessoning? shouldn't they be lessoning?
Perfect
shouldn't I have lessoned? shouldn't you have lessoned? shouldn't he have lessoned? shouldn't we have lessoned? shouldn't you have lessoned? shouldn't they have lessoned?
V-ing perfect
shouldn't I have been lessoning? shouldn't you have been lessoning? shouldn't he have been lessoning? shouldn't we have been lessoning? shouldn't you have been lessoning? shouldn't they have been lessoning?