I'd be estimating you'd be estimating he'd be estimating we'd be estimating you'd be estimating they'd be estimating
Perfect
I should've estimated you should've estimated he should've estimated we should've estimated you should've estimated they should've estimated
V-ing perfect
I should've been estimating you should've been estimating he should've been estimating we should've been estimating you should've been estimating they should've been estimating
Negation
Simple form
I shouldn't estimate you shouldn't estimate he shouldn't estimate we shouldn't estimate you shouldn't estimate they shouldn't estimate
V-ing form
I shouldn't be estimating you shouldn't be estimating he shouldn't be estimating we shouldn't be estimating you shouldn't be estimating they shouldn't be estimating
Perfect
I shouldn't have estimated you shouldn't have estimated he shouldn't have estimated we shouldn't have estimated you shouldn't have estimated they shouldn't have estimated
V-ing perfect
I shouldn't have been estimating you shouldn't have been estimating he shouldn't have been estimating we shouldn't have been estimating you shouldn't have been estimating they shouldn't have been estimating
Interrogative form
Simple form
should I estimate? should you estimate? should he estimate? should we estimate? should you estimate? should they estimate?
V-ing form
should I be estimating? should you be estimating? should he be estimating? should we be estimating? should you be estimating? should they be estimating?
Perfect
should I have estimated? should you have estimated? should he have estimated? should we have estimated? should you have estimated? should they have estimated?
V-ing perfect
should I have been estimating? should you have been estimating? should he have been estimating? should we have been estimating? should you have been estimating? should they have been estimating?
Interro-negative form
Simple form
shouldn't I estimate? shouldn't you estimate? shouldn't he estimate? shouldn't we estimate? shouldn't you estimate? shouldn't they estimate?
V-ing form
shouldn't I be estimating? shouldn't you be estimating? shouldn't he be estimating? shouldn't we be estimating? shouldn't you be estimating? shouldn't they be estimating?
Perfect
shouldn't I have estimated? shouldn't you have estimated? shouldn't he have estimated? shouldn't we have estimated? shouldn't you have estimated? shouldn't they have estimated?
V-ing perfect
shouldn't I have been estimating? shouldn't you have been estimating? shouldn't he have been estimating? shouldn't we have been estimating? shouldn't you have been estimating? shouldn't they have been estimating?