English verb conjugation
SHOULD ATTAIN

Regular verb: attain - attained - attained

Affirmation

Simple form	V-ing form
I'd attain you'd attain he'd attain we'd attain you'd attain they'd attain	I'd be attaining you'd be attaining he'd be attaining we'd be attaining you'd be attaining they'd be attaining
Perfect	V-ing perfect
I should've attained you should've attained he should've attained we should've attained you should've attained they should've attained	I should've been attaining you should've been attaining he should've been attaining we should've been attaining you should've been attaining they should've been attaining

Negation

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

Interrogative form

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

Interro-negative form

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