could prewarn
Verbe régulier : prewarn - prewarned- prewarned

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prewarn
you could prewarn
she could prewarn
we could prewarn
you could prewarn
they could prewarn 	I could be prewarning
you could be prewarning
she could be prewarning
we could be prewarning
you could be prewarning
they could be prewarning	I could have prewarned
you could have prewarned
she could have prewarned
we could have prewarned
you could have prewarned
they could have prewarned	I could have been prewarning
you could have been prewarning
she could have been prewarning
we could have been prewarning
you could have been prewarning
they could have been prewarning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not prewarn
you could not prewarn
she could not prewarn
we could not prewarn
you could not prewarn
they could not prewarn 	I could not be prewarning
you could not be prewarning
she could not be prewarning
we could not be prewarning
you could not be prewarning
they could not be prewarning	I could not have prewarned
you could not have prewarned
she could not have prewarned
we could not have prewarned
you could not have prewarned
they could not have prewarned	I could not have been prewarning
you could not have been prewarning
she could not have been prewarning
we could not have been prewarning
you could not have been prewarning
they could not have been prewarning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prewarn?
could you prewarn?
could she prewarn?
could we prewarn?
could you prewarn?
could they prewarn? 	could I be prewarning?
could you be prewarning?
could she be prewarning?
could we be prewarning?
could you be prewarning?
could they be prewarning? 	could I have prewarned?
could you have prewarned?
could she have prewarned?
could we have prewarned?
could you have prewarned?
could they have prewarned? 	could I have been prewarning?
could you have been prewarning?
could she have been prewarning?
could we have been prewarning?
could you have been prewarning?
could they have been prewarning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not prewarn?
could you not prewarn?
could she not prewarn?
could we not prewarn?
could you not prewarn?
could they not prewarn? 	could I not be prewarning?
could you not be prewarning?
could she not be prewarning?
could we not be prewarning?
could you not be prewarning?
could they not be prewarning? 	could I not have prewarned?
could you not have prewarned?
could she not have prewarned?
could we not have prewarned?
could you not have prewarned?
could they not have prewarned? 	could I not have been prewarning?
could you not have been prewarning?
could she not have been prewarning?
could we not have been prewarning?
could you not have been prewarning?
could they not have been prewarning?