could attain
Verbo regular: attain - attained- attained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could attain
you could attain
he could attain
we could attain
you could attain
they could attain 	I could be attaining
you could be attaining
he could be attaining
we could be attaining
you could be attaining
they could be attaining	I could have attained
you could have attained
he could have attained
we could have attained
you could have attained
they could have attained	I could have been attaining
you could have been attaining
he could have been attaining
we could have been attaining
you could have been attaining
they could have been attaining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't attain
you couldn't attain
he couldn't attain
we couldn't attain
you couldn't attain
they couldn't attain 	I couldn't be attaining
you couldn't be attaining
he couldn't be attaining
we couldn't be attaining
you couldn't be attaining
they couldn't be attaining	I couldn't have attained
you couldn't have attained
he couldn't have attained
we couldn't have attained
you couldn't have attained
they couldn't have attained	I couldn't have been attaining
you couldn't have been attaining
he couldn't have been attaining
we couldn't have been attaining
you couldn't have been attaining
they couldn't have been attaining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I attain?
could you attain?
could he attain?
could we attain?
could you attain?
could they attain? 	could I be attaining?
could you be attaining?
could he be attaining?
could we be attaining?
could you be attaining?
could they be attaining? 	could I have attained?
could you have attained?
could he have attained?
could we have attained?
could you have attained?
could they have attained? 	could I have been attaining?
could you have been attaining?
could he have been attaining?
could we have been attaining?
could you have been attaining?
could they have been attaining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I attain?
couldn't you attain?
couldn't he attain?
couldn't we attain?
couldn't you attain?
couldn't they attain? 	couldn't I be attaining?
couldn't you be attaining?
couldn't he be attaining?
couldn't we be attaining?
couldn't you be attaining?
couldn't they be attaining? 	couldn't I have attained?
couldn't you have attained?
couldn't he have attained?
couldn't we have attained?
couldn't you have attained?
couldn't they have attained? 	couldn't I have been attaining?
couldn't you have been attaining?
couldn't he have been attaining?
couldn't we have been attaining?
couldn't you have been attaining?
couldn't they have been attaining?