could efface
Regular verb: efface - effaced- effaced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could efface
you could efface
he could efface
we could efface
you could efface
they could efface 	I could be effacing
you could be effacing
he could be effacing
we could be effacing
you could be effacing
they could be effacing	I could have effaced
you could have effaced
he could have effaced
we could have effaced
you could have effaced
they could have effaced	I could have been effacing
you could have been effacing
he could have been effacing
we could have been effacing
you could have been effacing
they could have been effacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not efface
you could not efface
he could not efface
we could not efface
you could not efface
they could not efface 	I could not be effacing
you could not be effacing
he could not be effacing
we could not be effacing
you could not be effacing
they could not be effacing	I could not have effaced
you could not have effaced
he could not have effaced
we could not have effaced
you could not have effaced
they could not have effaced	I could not have been effacing
you could not have been effacing
he could not have been effacing
we could not have been effacing
you could not have been effacing
they could not have been effacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I efface?
could you efface?
could he efface?
could we efface?
could you efface?
could they efface? 	could I be effacing?
could you be effacing?
could he be effacing?
could we be effacing?
could you be effacing?
could they be effacing? 	could I have effaced?
could you have effaced?
could he have effaced?
could we have effaced?
could you have effaced?
could they have effaced? 	could I have been effacing?
could you have been effacing?
could he have been effacing?
could we have been effacing?
could you have been effacing?
could they have been effacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not efface?
could you not efface?
could he not efface?
could we not efface?
could you not efface?
could they not efface? 	could I not be effacing?
could you not be effacing?
could he not be effacing?
could we not be effacing?
could you not be effacing?
could they not be effacing? 	could I not have effaced?
could you not have effaced?
could he not have effaced?
could we not have effaced?
could you not have effaced?
could they not have effaced? 	could I not have been effacing?
could you not have been effacing?
could he not have been effacing?
could we not have been effacing?
could you not have been effacing?
could they not have been effacing?