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