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