should prop
Regular verb: prop - propped- propped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd prop
you'd prop
he'd prop
we'd prop
you'd prop
they'd prop 	I'd be propping
you'd be propping
he'd be propping
we'd be propping
you'd be propping
they'd be propping	I should've propped
you should've propped
he should've propped
we should've propped
you should've propped
they should've propped	I should've been propping
you should've been propping
he should've been propping
we should've been propping
you should've been propping
they should've been propping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't prop
you shouldn't prop
he shouldn't prop
we shouldn't prop
you shouldn't prop
they shouldn't prop 	I shouldn't be propping
you shouldn't be propping
he shouldn't be propping
we shouldn't be propping
you shouldn't be propping
they shouldn't be propping	I shouldn't have propped
you shouldn't have propped
he shouldn't have propped
we shouldn't have propped
you shouldn't have propped
they shouldn't have propped	I shouldn't have been propping
you shouldn't have been propping
he shouldn't have been propping
we shouldn't have been propping
you shouldn't have been propping
they shouldn't have been propping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I prop?
should you prop?
should he prop?
should we prop?
should you prop?
should they prop? 	should I be propping?
should you be propping?
should he be propping?
should we be propping?
should you be propping?
should they be propping? 	should I have propped?
should you have propped?
should he have propped?
should we have propped?
should you have propped?
should they have propped? 	should I have been propping?
should you have been propping?
should he have been propping?
should we have been propping?
should you have been propping?
should they have been propping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I prop?
shouldn't you prop?
shouldn't he prop?
shouldn't we prop?
shouldn't you prop?
shouldn't they prop? 	shouldn't I be propping?
shouldn't you be propping?
shouldn't he be propping?
shouldn't we be propping?
shouldn't you be propping?
shouldn't they be propping? 	shouldn't I have propped?
shouldn't you have propped?
shouldn't he have propped?
shouldn't we have propped?
shouldn't you have propped?
shouldn't they have propped? 	shouldn't I have been propping?
shouldn't you have been propping?
shouldn't he have been propping?
shouldn't we have been propping?
shouldn't you have been propping?
shouldn't they have been propping?