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