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