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