can prewarn
Verbe régulier : prewarn - prewarned- prewarned

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

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can't prewarn
you can't prewarn
she can't prewarn
we can't prewarn
you can't prewarn
they can't prewarn 	I can't be prewarning
you can't be prewarning
she can't be prewarning
we can't be prewarning
you can't be prewarning
they can't be prewarning	I can't have prewarned
you can't have prewarned
she can't have prewarned
we can't have prewarned
you can't have prewarned
they can't have prewarned	I can't have been prewarning
you can't have been prewarning
she can't have been prewarning
we can't have been prewarning
you can't have been prewarning
they can't have been prewarning	

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

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