I can diffuse you can diffuse she can diffuse we can diffuse you can diffuse they can diffuse
V-ing form
I can be diffusing you can be diffusing she can be diffusing we can be diffusing you can be diffusing they can be diffusing
Perfect
I can have diffused you can have diffused she can have diffused we can have diffused you can have diffused they can have diffused
V-ing perfect
I can have been diffusing you can have been diffusing she can have been diffusing we can have been diffusing you can have been diffusing they can have been diffusing
Negation
Simple form
I can't diffuse you can't diffuse she can't diffuse we can't diffuse you can't diffuse they can't diffuse
V-ing form
I can't be diffusing you can't be diffusing she can't be diffusing we can't be diffusing you can't be diffusing they can't be diffusing
Perfect
I can't have diffused you can't have diffused she can't have diffused we can't have diffused you can't have diffused they can't have diffused
V-ing perfect
I can't have been diffusing you can't have been diffusing she can't have been diffusing we can't have been diffusing you can't have been diffusing they can't have been diffusing
Interrogative form
Simple form
can I diffuse? can you diffuse? can she diffuse? can we diffuse? can you diffuse? can they diffuse?
V-ing form
can I be diffusing? can you be diffusing? can she be diffusing? can we be diffusing? can you be diffusing? can they be diffusing?
Perfect
can I have diffused? can you have diffused? can she have diffused? can we have diffused? can you have diffused? can they have diffused?
V-ing perfect
can I have been diffusing? can you have been diffusing? can she have been diffusing? can we have been diffusing? can you have been diffusing? can they have been diffusing?
Interro-negative form
Simple form
can't I diffuse? can't you diffuse? can't she diffuse? can't we diffuse? can't you diffuse? can't they diffuse?
V-ing form
can't I be diffusing? can't you be diffusing? can't she be diffusing? can't we be diffusing? can't you be diffusing? can't they be diffusing?
Perfect
can't I have diffused? can't you have diffused? can't she have diffused? can't we have diffused? can't you have diffused? can't they have diffused?
V-ing perfect
can't I have been diffusing? can't you have been diffusing? can't she have been diffusing? can't we have been diffusing? can't you have been diffusing? can't they have been diffusing?