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 could not shirr
you could not shirr
she could not shirr
we could not shirr
you could not shirr
they could not shirr 	I could not be shirring
you could not be shirring
she could not be shirring
we could not be shirring
you could not be shirring
they could not be shirring	I could not have shirred
you could not have shirred
she could not have shirred
we could not have shirred
you could not have shirred
they could not have shirred	I could not have been shirring
you could not have been shirring
she could not have been shirring
we could not have been shirring
you could not have been shirring
they could not 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 	
could I not shirr?
could you not shirr?
could she not shirr?
could we not shirr?
could you not shirr?
could they not shirr? 	could I not be shirring?
could you not be shirring?
could she not be shirring?
could we not be shirring?
could you not be shirring?
could they not be shirring? 	could I not have shirred?
could you not have shirred?
could she not have shirred?
could we not have shirred?
could you not have shirred?
could they not have shirred? 	could I not have been shirring?
could you not have been shirring?
could she not have been shirring?
could we not have been shirring?
could you not have been shirring?
could they not have been shirring?