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