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 couldn't dowel
you couldn't dowel
she couldn't dowel
we couldn't dowel
you couldn't dowel
they couldn't dowel 	I couldn't be dowelling
you couldn't be dowelling
she couldn't be dowelling
we couldn't be dowelling
you couldn't be dowelling
they couldn't be dowelling	I couldn't have dowelled
you couldn't have dowelled
she couldn't have dowelled
we couldn't have dowelled
you couldn't have dowelled
they couldn't have dowelled	I couldn't have been dowelling
you couldn't have been dowelling
she couldn't have been dowelling
we couldn't have been dowelling
you couldn't have been dowelling
they couldn't 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 	
couldn't I dowel?
couldn't you dowel?
couldn't she dowel?
couldn't we dowel?
couldn't you dowel?
couldn't they dowel? 	couldn't I be dowelling?
couldn't you be dowelling?
couldn't she be dowelling?
couldn't we be dowelling?
couldn't you be dowelling?
couldn't they be dowelling? 	couldn't I have dowelled?
couldn't you have dowelled?
couldn't she have dowelled?
couldn't we have dowelled?
couldn't you have dowelled?
couldn't they have dowelled? 	couldn't I have been dowelling?
couldn't you have been dowelling?
couldn't she have been dowelling?
couldn't we have been dowelling?
couldn't you have been dowelling?
couldn't they have been dowelling?