could obtain
Verbo regular: obtain - obtained- obtained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could obtain
you could obtain
he could obtain
we could obtain
you could obtain
they could obtain 	I could be obtaining
you could be obtaining
he could be obtaining
we could be obtaining
you could be obtaining
they could be obtaining	I could have obtained
you could have obtained
he could have obtained
we could have obtained
you could have obtained
they could have obtained	I could have been obtaining
you could have been obtaining
he could have been obtaining
we could have been obtaining
you could have been obtaining
they could have been obtaining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't obtain
you couldn't obtain
he couldn't obtain
we couldn't obtain
you couldn't obtain
they couldn't obtain 	I couldn't be obtaining
you couldn't be obtaining
he couldn't be obtaining
we couldn't be obtaining
you couldn't be obtaining
they couldn't be obtaining	I couldn't have obtained
you couldn't have obtained
he couldn't have obtained
we couldn't have obtained
you couldn't have obtained
they couldn't have obtained	I couldn't have been obtaining
you couldn't have been obtaining
he couldn't have been obtaining
we couldn't have been obtaining
you couldn't have been obtaining
they couldn't have been obtaining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I obtain?
could you obtain?
could he obtain?
could we obtain?
could you obtain?
could they obtain? 	could I be obtaining?
could you be obtaining?
could he be obtaining?
could we be obtaining?
could you be obtaining?
could they be obtaining? 	could I have obtained?
could you have obtained?
could he have obtained?
could we have obtained?
could you have obtained?
could they have obtained? 	could I have been obtaining?
could you have been obtaining?
could he have been obtaining?
could we have been obtaining?
could you have been obtaining?
could they have been obtaining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I obtain?
couldn't you obtain?
couldn't he obtain?
couldn't we obtain?
couldn't you obtain?
couldn't they obtain? 	couldn't I be obtaining?
couldn't you be obtaining?
couldn't he be obtaining?
couldn't we be obtaining?
couldn't you be obtaining?
couldn't they be obtaining? 	couldn't I have obtained?
couldn't you have obtained?
couldn't he have obtained?
couldn't we have obtained?
couldn't you have obtained?
couldn't they have obtained? 	couldn't I have been obtaining?
couldn't you have been obtaining?
couldn't he have been obtaining?
couldn't we have been obtaining?
couldn't you have been obtaining?
couldn't they have been obtaining?