could birl
Verbe régulier : birl - birled- birled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could birl
you could birl
she could birl
we could birl
you could birl
they could birl 	I could be birling
you could be birling
she could be birling
we could be birling
you could be birling
they could be birling	I could have birled
you could have birled
she could have birled
we could have birled
you could have birled
they could have birled	I could have been birling
you could have been birling
she could have been birling
we could have been birling
you could have been birling
they could have been birling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't birl
you couldn't birl
she couldn't birl
we couldn't birl
you couldn't birl
they couldn't birl 	I couldn't be birling
you couldn't be birling
she couldn't be birling
we couldn't be birling
you couldn't be birling
they couldn't be birling	I couldn't have birled
you couldn't have birled
she couldn't have birled
we couldn't have birled
you couldn't have birled
they couldn't have birled	I couldn't have been birling
you couldn't have been birling
she couldn't have been birling
we couldn't have been birling
you couldn't have been birling
they couldn't have been birling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I birl?
could you birl?
could she birl?
could we birl?
could you birl?
could they birl? 	could I be birling?
could you be birling?
could she be birling?
could we be birling?
could you be birling?
could they be birling? 	could I have birled?
could you have birled?
could she have birled?
could we have birled?
could you have birled?
could they have birled? 	could I have been birling?
could you have been birling?
could she have been birling?
could we have been birling?
could you have been birling?
could they have been birling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I birl?
couldn't you birl?
couldn't she birl?
couldn't we birl?
couldn't you birl?
couldn't they birl? 	couldn't I be birling?
couldn't you be birling?
couldn't she be birling?
couldn't we be birling?
couldn't you be birling?
couldn't they be birling? 	couldn't I have birled?
couldn't you have birled?
couldn't she have birled?
couldn't we have birled?
couldn't you have birled?
couldn't they have birled? 	couldn't I have been birling?
couldn't you have been birling?
couldn't she have been birling?
couldn't we have been birling?
couldn't you have been birling?
couldn't they have been birling?