I must ax you must ax he must ax we must ax you must ax they must ax
V-ing form
I must be axing you must be axing he must be axing we must be axing you must be axing they must be axing
Perfect
I must have axed you must have axed he must have axed we must have axed you must have axed they must have axed
V-ing perfect
I must have been axing you must have been axing he must have been axing we must have been axing you must have been axing they must have been axing
Negation
Simple form
I must not ax you must not ax he must not ax we must not ax you must not ax they must not ax
V-ing form
I must not be axing you must not be axing he must not be axing we must not be axing you must not be axing they must not be axing
Perfect
I must not have axed you must not have axed he must not have axed we must not have axed you must not have axed they must not have axed
V-ing perfect
I must not have been axing you must not have been axing he must not have been axing we must not have been axing you must not have been axing they must not have been axing
Interrogative form
Simple form
must I ax? must you ax? must he ax? must we ax? must you ax? must they ax?
V-ing form
must I be axing? must you be axing? must he be axing? must we be axing? must you be axing? must they be axing?
Perfect
must I have axed? must you have axed? must he have axed? must we have axed? must you have axed? must they have axed?
V-ing perfect
must I have been axing? must you have been axing? must he have been axing? must we have been axing? must you have been axing? must they have been axing?
Interro-negative form
Simple form
must I not ax? must you not ax? must he not ax? must we not ax? must you not ax? must they not ax?
V-ing form
must I not be axing? must you not be axing? must he not be axing? must we not be axing? must you not be axing? must they not be axing?
Perfect
must I not have axed? must you not have axed? must he not have axed? must we not have axed? must you not have axed? must they not have axed?
V-ing perfect
must I not have been axing? must you not have been axing? must he not have been axing? must we not have been axing? must you not have been axing? must they not have been axing?