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