I must suppose you must suppose he must suppose we must suppose you must suppose they must suppose
V-ing form
I must be supposing you must be supposing he must be supposing we must be supposing you must be supposing they must be supposing
Perfect
I must have supposed you must have supposed he must have supposed we must have supposed you must have supposed they must have supposed
V-ing perfect
I must have been supposing you must have been supposing he must have been supposing we must have been supposing you must have been supposing they must have been supposing
Negation
Simple form
I mustn't suppose you mustn't suppose he mustn't suppose we mustn't suppose you mustn't suppose they mustn't suppose
V-ing form
I mustn't be supposing you mustn't be supposing he mustn't be supposing we mustn't be supposing you mustn't be supposing they mustn't be supposing
Perfect
I mustn't have supposed you mustn't have supposed he mustn't have supposed we mustn't have supposed you mustn't have supposed they mustn't have supposed
V-ing perfect
I mustn't have been supposing you mustn't have been supposing he mustn't have been supposing we mustn't have been supposing you mustn't have been supposing they mustn't have been supposing
Interrogative form
Simple form
must I suppose? must you suppose? must he suppose? must we suppose? must you suppose? must they suppose?
V-ing form
must I be supposing? must you be supposing? must he be supposing? must we be supposing? must you be supposing? must they be supposing?
Perfect
must I have supposed? must you have supposed? must he have supposed? must we have supposed? must you have supposed? must they have supposed?
V-ing perfect
must I have been supposing? must you have been supposing? must he have been supposing? must we have been supposing? must you have been supposing? must they have been supposing?
Interro-negative form
Simple form
mustn't I suppose? mustn't you suppose? mustn't he suppose? mustn't we suppose? mustn't you suppose? mustn't they suppose?
V-ing form
mustn't I be supposing? mustn't you be supposing? mustn't he be supposing? mustn't we be supposing? mustn't you be supposing? mustn't they be supposing?
Perfect
mustn't I have supposed? mustn't you have supposed? mustn't he have supposed? mustn't we have supposed? mustn't you have supposed? mustn't they have supposed?
V-ing perfect
mustn't I have been supposing? mustn't you have been supposing? mustn't he have been supposing? mustn't we have been supposing? mustn't you have been supposing? mustn't they have been supposing?