I'd be doubling you'd be doubling she'd be doubling we'd be doubling you'd be doubling they'd be doubling
Perfect
I should've doubled you should've doubled she should've doubled we should've doubled you should've doubled they should've doubled
V-ing perfect
I should've been doubling you should've been doubling she should've been doubling we should've been doubling you should've been doubling they should've been doubling
Negation
Simple form
I shouldn't double you shouldn't double she shouldn't double we shouldn't double you shouldn't double they shouldn't double
V-ing form
I shouldn't be doubling you shouldn't be doubling she shouldn't be doubling we shouldn't be doubling you shouldn't be doubling they shouldn't be doubling
Perfect
I shouldn't have doubled you shouldn't have doubled she shouldn't have doubled we shouldn't have doubled you shouldn't have doubled they shouldn't have doubled
V-ing perfect
I shouldn't have been doubling you shouldn't have been doubling she shouldn't have been doubling we shouldn't have been doubling you shouldn't have been doubling they shouldn't have been doubling
Interrogative form
Simple form
should I double? should you double? should she double? should we double? should you double? should they double?
V-ing form
should I be doubling? should you be doubling? should she be doubling? should we be doubling? should you be doubling? should they be doubling?
Perfect
should I have doubled? should you have doubled? should she have doubled? should we have doubled? should you have doubled? should they have doubled?
V-ing perfect
should I have been doubling? should you have been doubling? should she have been doubling? should we have been doubling? should you have been doubling? should they have been doubling?
Interro-negative form
Simple form
shouldn't I double? shouldn't you double? shouldn't she double? shouldn't we double? shouldn't you double? shouldn't they double?
V-ing form
shouldn't I be doubling? shouldn't you be doubling? shouldn't she be doubling? shouldn't we be doubling? shouldn't you be doubling? shouldn't they be doubling?
Perfect
shouldn't I have doubled? shouldn't you have doubled? shouldn't she have doubled? shouldn't we have doubled? shouldn't you have doubled? shouldn't they have doubled?
V-ing perfect
shouldn't I have been doubling? shouldn't you have been doubling? shouldn't she have been doubling? shouldn't we have been doubling? shouldn't you have been doubling? shouldn't they have been doubling?