I could infuse you could infuse she could infuse we could infuse you could infuse they could infuse
V-ing form
I could be infusing you could be infusing she could be infusing we could be infusing you could be infusing they could be infusing
Perfect
I could have infused you could have infused she could have infused we could have infused you could have infused they could have infused
V-ing perfect
I could have been infusing you could have been infusing she could have been infusing we could have been infusing you could have been infusing they could have been infusing
Negation
Simple form
I couldn't infuse you couldn't infuse she couldn't infuse we couldn't infuse you couldn't infuse they couldn't infuse
V-ing form
I couldn't be infusing you couldn't be infusing she couldn't be infusing we couldn't be infusing you couldn't be infusing they couldn't be infusing
Perfect
I couldn't have infused you couldn't have infused she couldn't have infused we couldn't have infused you couldn't have infused they couldn't have infused
V-ing perfect
I couldn't have been infusing you couldn't have been infusing she couldn't have been infusing we couldn't have been infusing you couldn't have been infusing they couldn't have been infusing
Interrogative form
Simple form
could I infuse? could you infuse? could she infuse? could we infuse? could you infuse? could they infuse?
V-ing form
could I be infusing? could you be infusing? could she be infusing? could we be infusing? could you be infusing? could they be infusing?
Perfect
could I have infused? could you have infused? could she have infused? could we have infused? could you have infused? could they have infused?
V-ing perfect
could I have been infusing? could you have been infusing? could she have been infusing? could we have been infusing? could you have been infusing? could they have been infusing?
Interro-negative form
Simple form
couldn't I infuse? couldn't you infuse? couldn't she infuse? couldn't we infuse? couldn't you infuse? couldn't they infuse?
V-ing form
couldn't I be infusing? couldn't you be infusing? couldn't she be infusing? couldn't we be infusing? couldn't you be infusing? couldn't they be infusing?
Perfect
couldn't I have infused? couldn't you have infused? couldn't she have infused? couldn't we have infused? couldn't you have infused? couldn't they have infused?
V-ing perfect
couldn't I have been infusing? couldn't you have been infusing? couldn't she have been infusing? couldn't we have been infusing? couldn't you have been infusing? couldn't they have been infusing?