Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must stay away you must stay away he must stay away we must stay away you must stay away they must stay away
V-ing form
I must be stay awaying you must be stay awaying he must be stay awaying we must be stay awaying you must be stay awaying they must be stay awaying
Perfect
I must have stay awayed you must have stay awayed he must have stay awayed we must have stay awayed you must have stay awayed they must have stay awayed
V-ing perfect
I must have been stay awaying you must have been stay awaying he must have been stay awaying we must have been stay awaying you must have been stay awaying they must have been stay awaying
Negation
Simple form
I mustn't stay away you mustn't stay away he mustn't stay away we mustn't stay away you mustn't stay away they mustn't stay away
V-ing form
I mustn't be stay awaying you mustn't be stay awaying he mustn't be stay awaying we mustn't be stay awaying you mustn't be stay awaying they mustn't be stay awaying
Perfect
I mustn't have stay awayed you mustn't have stay awayed he mustn't have stay awayed we mustn't have stay awayed you mustn't have stay awayed they mustn't have stay awayed
V-ing perfect
I mustn't have been stay awaying you mustn't have been stay awaying he mustn't have been stay awaying we mustn't have been stay awaying you mustn't have been stay awaying they mustn't have been stay awaying
Interrogative form
Simple form
must I stay away? must you stay away? must he stay away? must we stay away? must you stay away? must they stay away?
V-ing form
must I be stay awaying? must you be stay awaying? must he be stay awaying? must we be stay awaying? must you be stay awaying? must they be stay awaying?
Perfect
must I have stay awayed? must you have stay awayed? must he have stay awayed? must we have stay awayed? must you have stay awayed? must they have stay awayed?
V-ing perfect
must I have been stay awaying? must you have been stay awaying? must he have been stay awaying? must we have been stay awaying? must you have been stay awaying? must they have been stay awaying?
Interro-negative form
Simple form
mustn't I stay away? mustn't you stay away? mustn't he stay away? mustn't we stay away? mustn't you stay away? mustn't they stay away?
V-ing form
mustn't I be stay awaying? mustn't you be stay awaying? mustn't he be stay awaying? mustn't we be stay awaying? mustn't you be stay awaying? mustn't they be stay awaying?
Perfect
mustn't I have stay awayed? mustn't you have stay awayed? mustn't he have stay awayed? mustn't we have stay awayed? mustn't you have stay awayed? mustn't they have stay awayed?
V-ing perfect
mustn't I have been stay awaying? mustn't you have been stay awaying? mustn't he have been stay awaying? mustn't we have been stay awaying? mustn't you have been stay awaying? mustn't they have been stay awaying?