could resign
Verbo regular: resign - resigned- resigned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could resign
you could resign
he could resign
we could resign
you could resign
they could resign 	I could be resigning
you could be resigning
he could be resigning
we could be resigning
you could be resigning
they could be resigning	I could have resigned
you could have resigned
he could have resigned
we could have resigned
you could have resigned
they could have resigned	I could have been resigning
you could have been resigning
he could have been resigning
we could have been resigning
you could have been resigning
they could have been resigning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't resign
you couldn't resign
he couldn't resign
we couldn't resign
you couldn't resign
they couldn't resign 	I couldn't be resigning
you couldn't be resigning
he couldn't be resigning
we couldn't be resigning
you couldn't be resigning
they couldn't be resigning	I couldn't have resigned
you couldn't have resigned
he couldn't have resigned
we couldn't have resigned
you couldn't have resigned
they couldn't have resigned	I couldn't have been resigning
you couldn't have been resigning
he couldn't have been resigning
we couldn't have been resigning
you couldn't have been resigning
they couldn't have been resigning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I resign?
could you resign?
could he resign?
could we resign?
could you resign?
could they resign? 	could I be resigning?
could you be resigning?
could he be resigning?
could we be resigning?
could you be resigning?
could they be resigning? 	could I have resigned?
could you have resigned?
could he have resigned?
could we have resigned?
could you have resigned?
could they have resigned? 	could I have been resigning?
could you have been resigning?
could he have been resigning?
could we have been resigning?
could you have been resigning?
could they have been resigning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I resign?
couldn't you resign?
couldn't he resign?
couldn't we resign?
couldn't you resign?
couldn't they resign? 	couldn't I be resigning?
couldn't you be resigning?
couldn't he be resigning?
couldn't we be resigning?
couldn't you be resigning?
couldn't they be resigning? 	couldn't I have resigned?
couldn't you have resigned?
couldn't he have resigned?
couldn't we have resigned?
couldn't you have resigned?
couldn't they have resigned? 	couldn't I have been resigning?
couldn't you have been resigning?
couldn't he have been resigning?
couldn't we have been resigning?
couldn't you have been resigning?
couldn't they have been resigning?