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