English verb conjugation
COULD ATTAIN

Regular verb: attain - attained - attained

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I could not attain you could not attain he 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 he could not be attaining we could not be attaining you could not be attaining they could not be attaining
Perfect	V-ing perfect
I could not have attained you could not have attained he 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 he could not have been attaining we could not have been attaining you could not have been attaining they could not have been attaining

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
could I not attain? could you not attain? could he 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 he not be attaining? could we not be attaining? could you not be attaining? could they not be attaining?
Perfect	V-ing perfect
could I not have attained? could you not have attained? could he 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 he not have been attaining? could we not have been attaining? could you not have been attaining? could they not have been attaining?