could sise
Verbe régulier : sise - sised- sised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could sise
you could sise
he could sise
we could sise
you could sise
they could sise 	I could be sising
you could be sising
he could be sising
we could be sising
you could be sising
they could be sising	I could have sised
you could have sised
he could have sised
we could have sised
you could have sised
they could have sised	I could have been sising
you could have been sising
he could have been sising
we could have been sising
you could have been sising
they could have been sising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't sise
you couldn't sise
he couldn't sise
we couldn't sise
you couldn't sise
they couldn't sise 	I couldn't be sising
you couldn't be sising
he couldn't be sising
we couldn't be sising
you couldn't be sising
they couldn't be sising	I couldn't have sised
you couldn't have sised
he couldn't have sised
we couldn't have sised
you couldn't have sised
they couldn't have sised	I couldn't have been sising
you couldn't have been sising
he couldn't have been sising
we couldn't have been sising
you couldn't have been sising
they couldn't have been sising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I sise?
could you sise?
could he sise?
could we sise?
could you sise?
could they sise? 	could I be sising?
could you be sising?
could he be sising?
could we be sising?
could you be sising?
could they be sising? 	could I have sised?
could you have sised?
could he have sised?
could we have sised?
could you have sised?
could they have sised? 	could I have been sising?
could you have been sising?
could he have been sising?
could we have been sising?
could you have been sising?
could they have been sising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I sise?
couldn't you sise?
couldn't he sise?
couldn't we sise?
couldn't you sise?
couldn't they sise? 	couldn't I be sising?
couldn't you be sising?
couldn't he be sising?
couldn't we be sising?
couldn't you be sising?
couldn't they be sising? 	couldn't I have sised?
couldn't you have sised?
couldn't he have sised?
couldn't we have sised?
couldn't you have sised?
couldn't they have sised? 	couldn't I have been sising?
couldn't you have been sising?
couldn't he have been sising?
couldn't we have been sising?
couldn't you have been sising?
couldn't they have been sising?