could twirl
Regular verb: twirl - twirled- twirled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could twirl
you could twirl
she could twirl
we could twirl
you could twirl
they could twirl 	I could be twirling
you could be twirling
she could be twirling
we could be twirling
you could be twirling
they could be twirling	I could have twirled
you could have twirled
she could have twirled
we could have twirled
you could have twirled
they could have twirled	I could have been twirling
you could have been twirling
she could have been twirling
we could have been twirling
you could have been twirling
they could have been twirling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't twirl
you couldn't twirl
she couldn't twirl
we couldn't twirl
you couldn't twirl
they couldn't twirl 	I couldn't be twirling
you couldn't be twirling
she couldn't be twirling
we couldn't be twirling
you couldn't be twirling
they couldn't be twirling	I couldn't have twirled
you couldn't have twirled
she couldn't have twirled
we couldn't have twirled
you couldn't have twirled
they couldn't have twirled	I couldn't have been twirling
you couldn't have been twirling
she couldn't have been twirling
we couldn't have been twirling
you couldn't have been twirling
they couldn't have been twirling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I twirl?
could you twirl?
could she twirl?
could we twirl?
could you twirl?
could they twirl? 	could I be twirling?
could you be twirling?
could she be twirling?
could we be twirling?
could you be twirling?
could they be twirling? 	could I have twirled?
could you have twirled?
could she have twirled?
could we have twirled?
could you have twirled?
could they have twirled? 	could I have been twirling?
could you have been twirling?
could she have been twirling?
could we have been twirling?
could you have been twirling?
could they have been twirling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I twirl?
couldn't you twirl?
couldn't she twirl?
couldn't we twirl?
couldn't you twirl?
couldn't they twirl? 	couldn't I be twirling?
couldn't you be twirling?
couldn't she be twirling?
couldn't we be twirling?
couldn't you be twirling?
couldn't they be twirling? 	couldn't I have twirled?
couldn't you have twirled?
couldn't she have twirled?
couldn't we have twirled?
couldn't you have twirled?
couldn't they have twirled? 	couldn't I have been twirling?
couldn't you have been twirling?
couldn't she have been twirling?
couldn't we have been twirling?
couldn't you have been twirling?
couldn't they have been twirling?