could discern
Verbo regular: discern - discerned- discerned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could discern
you could discern
he could discern
we could discern
you could discern
they could discern 	I could be discerning
you could be discerning
he could be discerning
we could be discerning
you could be discerning
they could be discerning	I could have discerned
you could have discerned
he could have discerned
we could have discerned
you could have discerned
they could have discerned	I could have been discerning
you could have been discerning
he could have been discerning
we could have been discerning
you could have been discerning
they could have been discerning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't discern
you couldn't discern
he couldn't discern
we couldn't discern
you couldn't discern
they couldn't discern 	I couldn't be discerning
you couldn't be discerning
he couldn't be discerning
we couldn't be discerning
you couldn't be discerning
they couldn't be discerning	I couldn't have discerned
you couldn't have discerned
he couldn't have discerned
we couldn't have discerned
you couldn't have discerned
they couldn't have discerned	I couldn't have been discerning
you couldn't have been discerning
he couldn't have been discerning
we couldn't have been discerning
you couldn't have been discerning
they couldn't have been discerning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I discern?
could you discern?
could he discern?
could we discern?
could you discern?
could they discern? 	could I be discerning?
could you be discerning?
could he be discerning?
could we be discerning?
could you be discerning?
could they be discerning? 	could I have discerned?
could you have discerned?
could he have discerned?
could we have discerned?
could you have discerned?
could they have discerned? 	could I have been discerning?
could you have been discerning?
could he have been discerning?
could we have been discerning?
could you have been discerning?
could they have been discerning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I discern?
couldn't you discern?
couldn't he discern?
couldn't we discern?
couldn't you discern?
couldn't they discern? 	couldn't I be discerning?
couldn't you be discerning?
couldn't he be discerning?
couldn't we be discerning?
couldn't you be discerning?
couldn't they be discerning? 	couldn't I have discerned?
couldn't you have discerned?
couldn't he have discerned?
couldn't we have discerned?
couldn't you have discerned?
couldn't they have discerned? 	couldn't I have been discerning?
couldn't you have been discerning?
couldn't he have been discerning?
couldn't we have been discerning?
couldn't you have been discerning?
couldn't they have been discerning?