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