could chirr
Verbe régulier : chirr - chirred- chirred

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could chirr
you could chirr
she could chirr
we could chirr
you could chirr
they could chirr 	I could be chirring
you could be chirring
she could be chirring
we could be chirring
you could be chirring
they could be chirring	I could have chirred
you could have chirred
she could have chirred
we could have chirred
you could have chirred
they could have chirred	I could have been chirring
you could have been chirring
she could have been chirring
we could have been chirring
you could have been chirring
they could have been chirring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't chirr
you couldn't chirr
she couldn't chirr
we couldn't chirr
you couldn't chirr
they couldn't chirr 	I couldn't be chirring
you couldn't be chirring
she couldn't be chirring
we couldn't be chirring
you couldn't be chirring
they couldn't be chirring	I couldn't have chirred
you couldn't have chirred
she couldn't have chirred
we couldn't have chirred
you couldn't have chirred
they couldn't have chirred	I couldn't have been chirring
you couldn't have been chirring
she couldn't have been chirring
we couldn't have been chirring
you couldn't have been chirring
they couldn't have been chirring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I chirr?
could you chirr?
could she chirr?
could we chirr?
could you chirr?
could they chirr? 	could I be chirring?
could you be chirring?
could she be chirring?
could we be chirring?
could you be chirring?
could they be chirring? 	could I have chirred?
could you have chirred?
could she have chirred?
could we have chirred?
could you have chirred?
could they have chirred? 	could I have been chirring?
could you have been chirring?
could she have been chirring?
could we have been chirring?
could you have been chirring?
could they have been chirring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I chirr?
couldn't you chirr?
couldn't she chirr?
couldn't we chirr?
couldn't you chirr?
couldn't they chirr? 	couldn't I be chirring?
couldn't you be chirring?
couldn't she be chirring?
couldn't we be chirring?
couldn't you be chirring?
couldn't they be chirring? 	couldn't I have chirred?
couldn't you have chirred?
couldn't she have chirred?
couldn't we have chirred?
couldn't you have chirred?
couldn't they have chirred? 	couldn't I have been chirring?
couldn't you have been chirring?
couldn't she have been chirring?
couldn't we have been chirring?
couldn't you have been chirring?
couldn't they have been chirring?