English verb conjugation
CAN SUPPOSE

Regular verb: suppose - supposed - supposed

Affirmation

Simple form	V-ing form
I can suppose you can suppose he can suppose we can suppose you can suppose they can suppose	I can be supposing you can be supposing he can be supposing we can be supposing you can be supposing they can be supposing
Perfect	V-ing perfect
I can have supposed you can have supposed he can have supposed we can have supposed you can have supposed they can have supposed	I can have been supposing you can have been supposing he can have been supposing we can have been supposing you can have been supposing they can have been supposing

Negation

Simple form	V-ing form
I can't suppose you can't suppose he can't suppose we can't suppose you can't suppose they can't suppose	I can't be supposing you can't be supposing he can't be supposing we can't be supposing you can't be supposing they can't be supposing
Perfect	V-ing perfect
I can't have supposed you can't have supposed he can't have supposed we can't have supposed you can't have supposed they can't have supposed	I can't have been supposing you can't have been supposing he can't have been supposing we can't have been supposing you can't have been supposing they can't have been supposing

Interrogative form

Simple form	V-ing form
can I suppose? can you suppose? can he suppose? can we suppose? can you suppose? can they suppose?	can I be supposing? can you be supposing? can he be supposing? can we be supposing? can you be supposing? can they be supposing?
Perfect	V-ing perfect
can I have supposed? can you have supposed? can he have supposed? can we have supposed? can you have supposed? can they have supposed?	can I have been supposing? can you have been supposing? can he have been supposing? can we have been supposing? can you have been supposing? can they have been supposing?

Interro-negative form

Simple form	V-ing form
can't I suppose? can't you suppose? can't he suppose? can't we suppose? can't you suppose? can't they suppose?	can't I be supposing? can't you be supposing? can't he be supposing? can't we be supposing? can't you be supposing? can't they be supposing?
Perfect	V-ing perfect
can't I have supposed? can't you have supposed? can't he have supposed? can't we have supposed? can't you have supposed? can't they have supposed?	can't I have been supposing? can't you have been supposing? can't he have been supposing? can't we have been supposing? can't you have been supposing? can't they have been supposing?