should buttress
Regular verb: buttress - buttressed- buttressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd buttress
you'd buttress
he'd buttress
we'd buttress
you'd buttress
they'd buttress 	I'd be buttressing
you'd be buttressing
he'd be buttressing
we'd be buttressing
you'd be buttressing
they'd be buttressing	I should've buttressed
you should've buttressed
he should've buttressed
we should've buttressed
you should've buttressed
they should've buttressed	I should've been buttressing
you should've been buttressing
he should've been buttressing
we should've been buttressing
you should've been buttressing
they should've been buttressing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't buttress
you shouldn't buttress
he shouldn't buttress
we shouldn't buttress
you shouldn't buttress
they shouldn't buttress 	I shouldn't be buttressing
you shouldn't be buttressing
he shouldn't be buttressing
we shouldn't be buttressing
you shouldn't be buttressing
they shouldn't be buttressing	I shouldn't have buttressed
you shouldn't have buttressed
he shouldn't have buttressed
we shouldn't have buttressed
you shouldn't have buttressed
they shouldn't have buttressed	I shouldn't have been buttressing
you shouldn't have been buttressing
he shouldn't have been buttressing
we shouldn't have been buttressing
you shouldn't have been buttressing
they shouldn't have been buttressing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I buttress?
should you buttress?
should he buttress?
should we buttress?
should you buttress?
should they buttress? 	should I be buttressing?
should you be buttressing?
should he be buttressing?
should we be buttressing?
should you be buttressing?
should they be buttressing? 	should I have buttressed?
should you have buttressed?
should he have buttressed?
should we have buttressed?
should you have buttressed?
should they have buttressed? 	should I have been buttressing?
should you have been buttressing?
should he have been buttressing?
should we have been buttressing?
should you have been buttressing?
should they have been buttressing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I buttress?
shouldn't you buttress?
shouldn't he buttress?
shouldn't we buttress?
shouldn't you buttress?
shouldn't they buttress? 	shouldn't I be buttressing?
shouldn't you be buttressing?
shouldn't he be buttressing?
shouldn't we be buttressing?
shouldn't you be buttressing?
shouldn't they be buttressing? 	shouldn't I have buttressed?
shouldn't you have buttressed?
shouldn't he have buttressed?
shouldn't we have buttressed?
shouldn't you have buttressed?
shouldn't they have buttressed? 	shouldn't I have been buttressing?
shouldn't you have been buttressing?
shouldn't he have been buttressing?
shouldn't we have been buttressing?
shouldn't you have been buttressing?
shouldn't they have been buttressing?