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
she could attain
we could attain
you could attain
they could attain 	I could be attaining
you could be attaining
she could be attaining
we could be attaining
you could be attaining
they could be attaining	I could have attained
you could have attained
she 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
she 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 could not attain
you could not attain
she could not attain
we could not attain
you could not attain
they could not attain 	I could not be attaining
you could not be attaining
she could not be attaining
we could not be attaining
you could not be attaining
they could not be attaining	I could not have attained
you could not have attained
she could not have attained
we could not have attained
you could not have attained
they could not have attained	I could not have been attaining
you could not have been attaining
she could not have been attaining
we could not have been attaining
you could not have been attaining
they could not have been attaining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I attain?
could you attain?
could she attain?
could we attain?
could you attain?
could they attain? 	could I be attaining?
could you be attaining?
could she be attaining?
could we be attaining?
could you be attaining?
could they be attaining? 	could I have attained?
could you have attained?
could she 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 she 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 	
could I not attain?
could you not attain?
could she not attain?
could we not attain?
could you not attain?
could they not attain? 	could I not be attaining?
could you not be attaining?
could she not be attaining?
could we not be attaining?
could you not be attaining?
could they not be attaining? 	could I not have attained?
could you not have attained?
could she not have attained?
could we not have attained?
could you not have attained?
could they not have attained? 	could I not have been attaining?
could you not have been attaining?
could she not have been attaining?
could we not have been attaining?
could you not have been attaining?
could they not have been attaining?