could dowel
Regular verb: dowel - dowelled- dowelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dowel
you could dowel
she could dowel
we could dowel
you could dowel
they could dowel 	I could be dowelling
you could be dowelling
she could be dowelling
we could be dowelling
you could be dowelling
they could be dowelling	I could have dowelled
you could have dowelled
she could have dowelled
we could have dowelled
you could have dowelled
they could have dowelled	I could have been dowelling
you could have been dowelling
she could have been dowelling
we could have been dowelling
you could have been dowelling
they could have been dowelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not dowel
you could not dowel
she could not dowel
we could not dowel
you could not dowel
they could not dowel 	I could not be dowelling
you could not be dowelling
she could not be dowelling
we could not be dowelling
you could not be dowelling
they could not be dowelling	I could not have dowelled
you could not have dowelled
she could not have dowelled
we could not have dowelled
you could not have dowelled
they could not have dowelled	I could not have been dowelling
you could not have been dowelling
she could not have been dowelling
we could not have been dowelling
you could not have been dowelling
they could not have been dowelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dowel?
could you dowel?
could she dowel?
could we dowel?
could you dowel?
could they dowel? 	could I be dowelling?
could you be dowelling?
could she be dowelling?
could we be dowelling?
could you be dowelling?
could they be dowelling? 	could I have dowelled?
could you have dowelled?
could she have dowelled?
could we have dowelled?
could you have dowelled?
could they have dowelled? 	could I have been dowelling?
could you have been dowelling?
could she have been dowelling?
could we have been dowelling?
could you have been dowelling?
could they have been dowelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not dowel?
could you not dowel?
could she not dowel?
could we not dowel?
could you not dowel?
could they not dowel? 	could I not be dowelling?
could you not be dowelling?
could she not be dowelling?
could we not be dowelling?
could you not be dowelling?
could they not be dowelling? 	could I not have dowelled?
could you not have dowelled?
could she not have dowelled?
could we not have dowelled?
could you not have dowelled?
could they not have dowelled? 	could I not have been dowelling?
could you not have been dowelling?
could she not have been dowelling?
could we not have been dowelling?
could you not have been dowelling?
could they not have been dowelling?