could enamel
Regular verb: enamel - enamelled- enamelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could enamel
you could enamel
he could enamel
we could enamel
you could enamel
they could enamel 	I could be enamelling
you could be enamelling
he could be enamelling
we could be enamelling
you could be enamelling
they could be enamelling	I could have enamelled
you could have enamelled
he could have enamelled
we could have enamelled
you could have enamelled
they could have enamelled	I could have been enamelling
you could have been enamelling
he could have been enamelling
we could have been enamelling
you could have been enamelling
they could have been enamelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not enamel
you could not enamel
he could not enamel
we could not enamel
you could not enamel
they could not enamel 	I could not be enamelling
you could not be enamelling
he could not be enamelling
we could not be enamelling
you could not be enamelling
they could not be enamelling	I could not have enamelled
you could not have enamelled
he could not have enamelled
we could not have enamelled
you could not have enamelled
they could not have enamelled	I could not have been enamelling
you could not have been enamelling
he could not have been enamelling
we could not have been enamelling
you could not have been enamelling
they could not have been enamelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I enamel?
could you enamel?
could he enamel?
could we enamel?
could you enamel?
could they enamel? 	could I be enamelling?
could you be enamelling?
could he be enamelling?
could we be enamelling?
could you be enamelling?
could they be enamelling? 	could I have enamelled?
could you have enamelled?
could he have enamelled?
could we have enamelled?
could you have enamelled?
could they have enamelled? 	could I have been enamelling?
could you have been enamelling?
could he have been enamelling?
could we have been enamelling?
could you have been enamelling?
could they have been enamelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not enamel?
could you not enamel?
could he not enamel?
could we not enamel?
could you not enamel?
could they not enamel? 	could I not be enamelling?
could you not be enamelling?
could he not be enamelling?
could we not be enamelling?
could you not be enamelling?
could they not be enamelling? 	could I not have enamelled?
could you not have enamelled?
could he not have enamelled?
could we not have enamelled?
could you not have enamelled?
could they not have enamelled? 	could I not have been enamelling?
could you not have been enamelling?
could he not have been enamelling?
could we not have been enamelling?
could you not have been enamelling?
could they not have been enamelling?