could thorn
Verbe régulier : thorn - thorned- thorned

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could thorn
you could thorn
he could thorn
we could thorn
you could thorn
they could thorn 	I could be thorning
you could be thorning
he could be thorning
we could be thorning
you could be thorning
they could be thorning	I could have thorned
you could have thorned
he could have thorned
we could have thorned
you could have thorned
they could have thorned	I could have been thorning
you could have been thorning
he could have been thorning
we could have been thorning
you could have been thorning
they could have been thorning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't thorn
you couldn't thorn
he couldn't thorn
we couldn't thorn
you couldn't thorn
they couldn't thorn 	I couldn't be thorning
you couldn't be thorning
he couldn't be thorning
we couldn't be thorning
you couldn't be thorning
they couldn't be thorning	I couldn't have thorned
you couldn't have thorned
he couldn't have thorned
we couldn't have thorned
you couldn't have thorned
they couldn't have thorned	I couldn't have been thorning
you couldn't have been thorning
he couldn't have been thorning
we couldn't have been thorning
you couldn't have been thorning
they couldn't have been thorning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I thorn?
could you thorn?
could he thorn?
could we thorn?
could you thorn?
could they thorn? 	could I be thorning?
could you be thorning?
could he be thorning?
could we be thorning?
could you be thorning?
could they be thorning? 	could I have thorned?
could you have thorned?
could he have thorned?
could we have thorned?
could you have thorned?
could they have thorned? 	could I have been thorning?
could you have been thorning?
could he have been thorning?
could we have been thorning?
could you have been thorning?
could they have been thorning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I thorn?
couldn't you thorn?
couldn't he thorn?
couldn't we thorn?
couldn't you thorn?
couldn't they thorn? 	couldn't I be thorning?
couldn't you be thorning?
couldn't he be thorning?
couldn't we be thorning?
couldn't you be thorning?
couldn't they be thorning? 	couldn't I have thorned?
couldn't you have thorned?
couldn't he have thorned?
couldn't we have thorned?
couldn't you have thorned?
couldn't they have thorned? 	couldn't I have been thorning?
couldn't you have been thorning?
couldn't he have been thorning?
couldn't we have been thorning?
couldn't you have been thorning?
couldn't they have been thorning?