could shirr
Verbe régulier : shirr - shirred- shirred

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could shirr
you could shirr
she could shirr
we could shirr
you could shirr
they could shirr 	I could be shirring
you could be shirring
she could be shirring
we could be shirring
you could be shirring
they could be shirring	I could have shirred
you could have shirred
she could have shirred
we could have shirred
you could have shirred
they could have shirred	I could have been shirring
you could have been shirring
she could have been shirring
we could have been shirring
you could have been shirring
they could have been shirring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't shirr
you couldn't shirr
she couldn't shirr
we couldn't shirr
you couldn't shirr
they couldn't shirr 	I couldn't be shirring
you couldn't be shirring
she couldn't be shirring
we couldn't be shirring
you couldn't be shirring
they couldn't be shirring	I couldn't have shirred
you couldn't have shirred
she couldn't have shirred
we couldn't have shirred
you couldn't have shirred
they couldn't have shirred	I couldn't have been shirring
you couldn't have been shirring
she couldn't have been shirring
we couldn't have been shirring
you couldn't have been shirring
they couldn't have been shirring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I shirr?
could you shirr?
could she shirr?
could we shirr?
could you shirr?
could they shirr? 	could I be shirring?
could you be shirring?
could she be shirring?
could we be shirring?
could you be shirring?
could they be shirring? 	could I have shirred?
could you have shirred?
could she have shirred?
could we have shirred?
could you have shirred?
could they have shirred? 	could I have been shirring?
could you have been shirring?
could she have been shirring?
could we have been shirring?
could you have been shirring?
could they have been shirring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I shirr?
couldn't you shirr?
couldn't she shirr?
couldn't we shirr?
couldn't you shirr?
couldn't they shirr? 	couldn't I be shirring?
couldn't you be shirring?
couldn't she be shirring?
couldn't we be shirring?
couldn't you be shirring?
couldn't they be shirring? 	couldn't I have shirred?
couldn't you have shirred?
couldn't she have shirred?
couldn't we have shirred?
couldn't you have shirred?
couldn't they have shirred? 	couldn't I have been shirring?
couldn't you have been shirring?
couldn't she have been shirring?
couldn't we have been shirring?
couldn't you have been shirring?
couldn't they have been shirring?