English verb conjugation
CAN ATTAIN

Regular verb: attain - attained - attained

Affirmation

Simple form	V-ing form
I can attain you can attain he can attain we can attain you can attain they can attain	I can be attaining you can be attaining he can be attaining we can be attaining you can be attaining they can be attaining
Perfect	V-ing perfect
I can have attained you can have attained he can have attained we can have attained you can have attained they can have attained	I can have been attaining you can have been attaining he can have been attaining we can have been attaining you can have been attaining they can have been attaining

Negation

Simple form	V-ing form
I can't attain you can't attain he can't attain we can't attain you can't attain they can't attain	I can't be attaining you can't be attaining he can't be attaining we can't be attaining you can't be attaining they can't be attaining
Perfect	V-ing perfect
I can't have attained you can't have attained he can't have attained we can't have attained you can't have attained they can't have attained	I can't have been attaining you can't have been attaining he can't have been attaining we can't have been attaining you can't have been attaining they can't have been attaining

Interrogative form

Simple form	V-ing form
can I attain? can you attain? can he attain? can we attain? can you attain? can they attain?	can I be attaining? can you be attaining? can he be attaining? can we be attaining? can you be attaining? can they be attaining?
Perfect	V-ing perfect
can I have attained? can you have attained? can he have attained? can we have attained? can you have attained? can they have attained?	can I have been attaining? can you have been attaining? can he have been attaining? can we have been attaining? can you have been attaining? can they have been attaining?

Interro-negative form

Simple form	V-ing form
can't I attain? can't you attain? can't he attain? can't we attain? can't you attain? can't they attain?	can't I be attaining? can't you be attaining? can't he be attaining? can't we be attaining? can't you be attaining? can't they be attaining?
Perfect	V-ing perfect
can't I have attained? can't you have attained? can't he have attained? can't we have attained? can't you have attained? can't they have attained?	can't I have been attaining? can't you have been attaining? can't he have been attaining? can't we have been attaining? can't you have been attaining? can't they have been attaining?