I could transfuse you could transfuse he could transfuse we could transfuse you could transfuse they could transfuse
V-ing form
I could be transfusing you could be transfusing he could be transfusing we could be transfusing you could be transfusing they could be transfusing
Perfect
I could have transfused you could have transfused he 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 he 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 he 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 he 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 he 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 he 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 he transfuse? could we transfuse? could you transfuse? could they transfuse?
V-ing form
could I be transfusing? could you be transfusing? could he be transfusing? could we be transfusing? could you be transfusing? could they be transfusing?
Perfect
could I have transfused? could you have transfused? could he 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 he 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 he 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 he 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 he 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 he have been transfusing? couldn't we have been transfusing? couldn't you have been transfusing? couldn't they have been transfusing?