ought to prewarn
Verbe régulier : prewarn - prewarned- prewarned

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I ought to prewarn
you ought to prewarn
he ought to prewarn
we ought to prewarn
you ought to prewarn
they ought to prewarn 	I ought to be prewarning
you ought to be prewarning
he ought to be prewarning
we ought to be prewarning
you ought to be prewarning
they ought to be prewarning	I ought to have prewarned
you ought to have prewarned
he ought to have prewarned
we ought to have prewarned
you ought to have prewarned
they ought to have prewarned	I ought to have been prewarning
you ought to have been prewarning
he ought to have been prewarning
we ought to have been prewarning
you ought to have been prewarning
they ought to have been prewarning	

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

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
ought to I prewarn?
ought to you prewarn?
ought to he prewarn?
ought to we prewarn?
ought to you prewarn?
ought to they prewarn? 	ought to I be prewarning?
ought to you be prewarning?
ought to he be prewarning?
ought to we be prewarning?
ought to you be prewarning?
ought to they be prewarning? 	ought to I have prewarned?
ought to you have prewarned?
ought to he have prewarned?
ought to we have prewarned?
ought to you have prewarned?
ought to they have prewarned? 	ought to I have been prewarning?
ought to you have been prewarning?
ought to he have been prewarning?
ought to we have been prewarning?
ought to you have been prewarning?
ought to they have been prewarning? 	

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