should checkmate
Regular verb: checkmate - checkmated- checkmated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should checkmate
you should checkmate
she should checkmate
we should checkmate
you should checkmate
they should checkmate 	I should be checkmating
you should be checkmating
she should be checkmating
we should be checkmating
you should be checkmating
they should be checkmating	I should have checkmated
you should have checkmated
she should have checkmated
we should have checkmated
you should have checkmated
they should have checkmated	I should have been checkmating
you should have been checkmating
she should have been checkmating
we should have been checkmating
you should have been checkmating
they should have been checkmating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not checkmate
you should not checkmate
she should not checkmate
we should not checkmate
you should not checkmate
they should not checkmate 	I should not be checkmating
you should not be checkmating
she should not be checkmating
we should not be checkmating
you should not be checkmating
they should not be checkmating	I should not have checkmated
you should not have checkmated
she should not have checkmated
we should not have checkmated
you should not have checkmated
they should not have checkmated	I should not have been checkmating
you should not have been checkmating
she should not have been checkmating
we should not have been checkmating
you should not have been checkmating
they should not have been checkmating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I checkmate?
should you checkmate?
should she checkmate?
should we checkmate?
should you checkmate?
should they checkmate? 	should I be checkmating?
should you be checkmating?
should she be checkmating?
should we be checkmating?
should you be checkmating?
should they be checkmating? 	should I have checkmated?
should you have checkmated?
should she have checkmated?
should we have checkmated?
should you have checkmated?
should they have checkmated? 	should I have been checkmating?
should you have been checkmating?
should she have been checkmating?
should we have been checkmating?
should you have been checkmating?
should they have been checkmating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not checkmate?
should you not checkmate?
should she not checkmate?
should we not checkmate?
should you not checkmate?
should they not checkmate? 	should I not be checkmating?
should you not be checkmating?
should she not be checkmating?
should we not be checkmating?
should you not be checkmating?
should they not be checkmating? 	should I not have checkmated?
should you not have checkmated?
should she not have checkmated?
should we not have checkmated?
should you not have checkmated?
should they not have checkmated? 	should I not have been checkmating?
should you not have been checkmating?
should she not have been checkmating?
should we not have been checkmating?
should you not have been checkmating?
should they not have been checkmating?