English verb conjugation
SHOULD OVERESTIMATE

Regular verb: overestimate - overestimated - overestimated

Affirmation

Simple form	V-ing form
I'd overestimate you'd overestimate he'd overestimate we'd overestimate you'd overestimate they'd overestimate	I'd be overestimating you'd be overestimating he'd be overestimating we'd be overestimating you'd be overestimating they'd be overestimating
Perfect	V-ing perfect
I should've overestimated you should've overestimated he should've overestimated we should've overestimated you should've overestimated they should've overestimated	I should've been overestimating you should've been overestimating he should've been overestimating we should've been overestimating you should've been overestimating they should've been overestimating

Negation

Simple form	V-ing form
I shouldn't overestimate you shouldn't overestimate he shouldn't overestimate we shouldn't overestimate you shouldn't overestimate they shouldn't overestimate	I shouldn't be overestimating you shouldn't be overestimating he shouldn't be overestimating we shouldn't be overestimating you shouldn't be overestimating they shouldn't be overestimating
Perfect	V-ing perfect
I shouldn't have overestimated you shouldn't have overestimated he shouldn't have overestimated we shouldn't have overestimated you shouldn't have overestimated they shouldn't have overestimated	I shouldn't have been overestimating you shouldn't have been overestimating he shouldn't have been overestimating we shouldn't have been overestimating you shouldn't have been overestimating they shouldn't have been overestimating

Interrogative form

Simple form	V-ing form
should I overestimate? should you overestimate? should he overestimate? should we overestimate? should you overestimate? should they overestimate?	should I be overestimating? should you be overestimating? should he be overestimating? should we be overestimating? should you be overestimating? should they be overestimating?
Perfect	V-ing perfect
should I have overestimated? should you have overestimated? should he have overestimated? should we have overestimated? should you have overestimated? should they have overestimated?	should I have been overestimating? should you have been overestimating? should he have been overestimating? should we have been overestimating? should you have been overestimating? should they have been overestimating?

Interro-negative form

Simple form	V-ing form
shouldn't I overestimate? shouldn't you overestimate? shouldn't he overestimate? shouldn't we overestimate? shouldn't you overestimate? shouldn't they overestimate?	shouldn't I be overestimating? shouldn't you be overestimating? shouldn't he be overestimating? shouldn't we be overestimating? shouldn't you be overestimating? shouldn't they be overestimating?
Perfect	V-ing perfect
shouldn't I have overestimated? shouldn't you have overestimated? shouldn't he have overestimated? shouldn't we have overestimated? shouldn't you have overestimated? shouldn't they have overestimated?	shouldn't I have been overestimating? shouldn't you have been overestimating? shouldn't he have been overestimating? shouldn't we have been overestimating? shouldn't you have been overestimating? shouldn't they have been overestimating?