ought to checkmate
Regular verb: checkmate - checkmated- checkmated

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to checkmate
you oughtn't to checkmate
she oughtn't to checkmate
we oughtn't to checkmate
you oughtn't to checkmate
they oughtn't to checkmate 	I oughtn't to be checkmating
you oughtn't to be checkmating
she oughtn't to be checkmating
we oughtn't to be checkmating
you oughtn't to be checkmating
they oughtn't to be checkmating	I oughtn't to have checkmated
you oughtn't to have checkmated
she oughtn't to have checkmated
we oughtn't to have checkmated
you oughtn't to have checkmated
they oughtn't to have checkmated	I oughtn't to have been checkmating
you oughtn't to have been checkmating
she oughtn't to have been checkmating
we oughtn't to have been checkmating
you oughtn't to have been checkmating
they oughtn't to have been checkmating	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to checkmate?
oughtn't you to checkmate?
oughtn't she to checkmate?
oughtn't we to checkmate?
oughtn't you to checkmate?
oughtn't they to checkmate? 	oughtn't I to be checkmating?
oughtn't you to be checkmating?
oughtn't she to be checkmating?
oughtn't we to be checkmating?
oughtn't you to be checkmating?
oughtn't they to be checkmating? 	oughtn't I to have checkmated?
oughtn't you to have checkmated?
oughtn't she to have checkmated?
oughtn't we to have checkmated?
oughtn't you to have checkmated?
oughtn't they to have checkmated? 	oughtn't I to have been checkmating?
oughtn't you to have been checkmating?
oughtn't she to have been checkmating?
oughtn't we to have been checkmating?
oughtn't you to have been checkmating?
oughtn't they to have been checkmating?