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