I'd be diffusing you'd be diffusing she'd be diffusing we'd be diffusing you'd be diffusing they'd be diffusing
Perfect
I should've diffused you should've diffused she 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 she 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 she 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 she 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 she 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 she 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 she diffuse? should we diffuse? should you diffuse? should they diffuse?
V-ing form
should I be diffusing? should you be diffusing? should she be diffusing? should we be diffusing? should you be diffusing? should they be diffusing?
Perfect
should I have diffused? should you have diffused? should she 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 she 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 she 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 she 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 she 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 she have been diffusing? shouldn't we have been diffusing? shouldn't you have been diffusing? shouldn't they have been diffusing?