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