I could presuppose you could presuppose he could presuppose we could presuppose you could presuppose they could presuppose
V-ing form
I could be presupposing you could be presupposing he could be presupposing we could be presupposing you could be presupposing they could be presupposing
Perfect
I could have presupposed you could have presupposed he could have presupposed we could have presupposed you could have presupposed they could have presupposed
V-ing perfect
I could have been presupposing you could have been presupposing he could have been presupposing we could have been presupposing you could have been presupposing they could have been presupposing
Negation
Simple form
I could not presuppose you could not presuppose he could not presuppose we could not presuppose you could not presuppose they could not presuppose
V-ing form
I could not be presupposing you could not be presupposing he could not be presupposing we could not be presupposing you could not be presupposing they could not be presupposing
Perfect
I could not have presupposed you could not have presupposed he could not have presupposed we could not have presupposed you could not have presupposed they could not have presupposed
V-ing perfect
I could not have been presupposing you could not have been presupposing he could not have been presupposing we could not have been presupposing you could not have been presupposing they could not have been presupposing
Interrogative form
Simple form
could I presuppose? could you presuppose? could he presuppose? could we presuppose? could you presuppose? could they presuppose?
V-ing form
could I be presupposing? could you be presupposing? could he be presupposing? could we be presupposing? could you be presupposing? could they be presupposing?
Perfect
could I have presupposed? could you have presupposed? could he have presupposed? could we have presupposed? could you have presupposed? could they have presupposed?
V-ing perfect
could I have been presupposing? could you have been presupposing? could he have been presupposing? could we have been presupposing? could you have been presupposing? could they have been presupposing?
Interro-negative form
Simple form
could I not presuppose? could you not presuppose? could he not presuppose? could we not presuppose? could you not presuppose? could they not presuppose?
V-ing form
could I not be presupposing? could you not be presupposing? could he not be presupposing? could we not be presupposing? could you not be presupposing? could they not be presupposing?
Perfect
could I not have presupposed? could you not have presupposed? could he not have presupposed? could we not have presupposed? could you not have presupposed? could they not have presupposed?
V-ing perfect
could I not have been presupposing? could you not have been presupposing? could he not have been presupposing? could we not have been presupposing? could you not have been presupposing? could they not have been presupposing?