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