could disgrace
Regular verb: disgrace - disgraced- disgraced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could disgrace
you could disgrace
she could disgrace
we could disgrace
you could disgrace
they could disgrace 	I could be disgracing
you could be disgracing
she could be disgracing
we could be disgracing
you could be disgracing
they could be disgracing	I could have disgraced
you could have disgraced
she could have disgraced
we could have disgraced
you could have disgraced
they could have disgraced	I could have been disgracing
you could have been disgracing
she could have been disgracing
we could have been disgracing
you could have been disgracing
they could have been disgracing	

Negation 	
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I couldn't disgrace
you couldn't disgrace
she couldn't disgrace
we couldn't disgrace
you couldn't disgrace
they couldn't disgrace 	I couldn't be disgracing
you couldn't be disgracing
she couldn't be disgracing
we couldn't be disgracing
you couldn't be disgracing
they couldn't be disgracing	I couldn't have disgraced
you couldn't have disgraced
she couldn't have disgraced
we couldn't have disgraced
you couldn't have disgraced
they couldn't have disgraced	I couldn't have been disgracing
you couldn't have been disgracing
she couldn't have been disgracing
we couldn't have been disgracing
you couldn't have been disgracing
they couldn't have been disgracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I disgrace?
could you disgrace?
could she disgrace?
could we disgrace?
could you disgrace?
could they disgrace? 	could I be disgracing?
could you be disgracing?
could she be disgracing?
could we be disgracing?
could you be disgracing?
could they be disgracing? 	could I have disgraced?
could you have disgraced?
could she have disgraced?
could we have disgraced?
could you have disgraced?
could they have disgraced? 	could I have been disgracing?
could you have been disgracing?
could she have been disgracing?
could we have been disgracing?
could you have been disgracing?
could they have been disgracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I disgrace?
couldn't you disgrace?
couldn't she disgrace?
couldn't we disgrace?
couldn't you disgrace?
couldn't they disgrace? 	couldn't I be disgracing?
couldn't you be disgracing?
couldn't she be disgracing?
couldn't we be disgracing?
couldn't you be disgracing?
couldn't they be disgracing? 	couldn't I have disgraced?
couldn't you have disgraced?
couldn't she have disgraced?
couldn't we have disgraced?
couldn't you have disgraced?
couldn't they have disgraced? 	couldn't I have been disgracing?
couldn't you have been disgracing?
couldn't she have been disgracing?
couldn't we have been disgracing?
couldn't you have been disgracing?
couldn't they have been disgracing?