could disgrace
Regular verb: disgrace - disgraced- disgraced

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't disgrace
you couldn't disgrace
he 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
he 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
he 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
he 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 he disgrace?
could we disgrace?
could you disgrace?
could they disgrace? 	could I be disgracing?
could you be disgracing?
could he be disgracing?
could we be disgracing?
could you be disgracing?
could they be disgracing? 	could I have disgraced?
could you have disgraced?
could he 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 he 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 he 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 he 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 he 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 he have been disgracing?
couldn't we have been disgracing?
couldn't you have been disgracing?
couldn't they have been disgracing?