could forewarn
Verbo regular: forewarn - forewarned- forewarned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could forewarn
you could forewarn
she could forewarn
we could forewarn
you could forewarn
they could forewarn 	I could be forewarning
you could be forewarning
she could be forewarning
we could be forewarning
you could be forewarning
they could be forewarning	I could have forewarned
you could have forewarned
she could have forewarned
we could have forewarned
you could have forewarned
they could have forewarned	I could have been forewarning
you could have been forewarning
she could have been forewarning
we could have been forewarning
you could have been forewarning
they could have been forewarning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not forewarn
you could not forewarn
she could not forewarn
we could not forewarn
you could not forewarn
they could not forewarn 	I could not be forewarning
you could not be forewarning
she could not be forewarning
we could not be forewarning
you could not be forewarning
they could not be forewarning	I could not have forewarned
you could not have forewarned
she could not have forewarned
we could not have forewarned
you could not have forewarned
they could not have forewarned	I could not have been forewarning
you could not have been forewarning
she could not have been forewarning
we could not have been forewarning
you could not have been forewarning
they could not have been forewarning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I forewarn?
could you forewarn?
could she forewarn?
could we forewarn?
could you forewarn?
could they forewarn? 	could I be forewarning?
could you be forewarning?
could she be forewarning?
could we be forewarning?
could you be forewarning?
could they be forewarning? 	could I have forewarned?
could you have forewarned?
could she have forewarned?
could we have forewarned?
could you have forewarned?
could they have forewarned? 	could I have been forewarning?
could you have been forewarning?
could she have been forewarning?
could we have been forewarning?
could you have been forewarning?
could they have been forewarning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not forewarn?
could you not forewarn?
could she not forewarn?
could we not forewarn?
could you not forewarn?
could they not forewarn? 	could I not be forewarning?
could you not be forewarning?
could she not be forewarning?
could we not be forewarning?
could you not be forewarning?
could they not be forewarning? 	could I not have forewarned?
could you not have forewarned?
could she not have forewarned?
could we not have forewarned?
could you not have forewarned?
could they not have forewarned? 	could I not have been forewarning?
could you not have been forewarning?
could she not have been forewarning?
could we not have been forewarning?
could you not have been forewarning?
could they not have been forewarning?