should buttress
Regular verb: buttress - buttressed- buttressed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not buttress
you should not buttress
he should not buttress
we should not buttress
you should not buttress
they should not buttress 	I should not be buttressing
you should not be buttressing
he should not be buttressing
we should not be buttressing
you should not be buttressing
they should not be buttressing	I should not have buttressed
you should not have buttressed
he should not have buttressed
we should not have buttressed
you should not have buttressed
they should not have buttressed	I should not have been buttressing
you should not have been buttressing
he should not have been buttressing
we should not have been buttressing
you should not have been buttressing
they should not 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 	
should I not buttress?
should you not buttress?
should he not buttress?
should we not buttress?
should you not buttress?
should they not buttress? 	should I not be buttressing?
should you not be buttressing?
should he not be buttressing?
should we not be buttressing?
should you not be buttressing?
should they not be buttressing? 	should I not have buttressed?
should you not have buttressed?
should he not have buttressed?
should we not have buttressed?
should you not have buttressed?
should they not have buttressed? 	should I not have been buttressing?
should you not have been buttressing?
should he not have been buttressing?
should we not have been buttressing?
should you not have been buttressing?
should they not have been buttressing?