I must spawn you must spawn she must spawn we must spawn you must spawn they must spawn
V-ing form
I must be spawning you must be spawning she must be spawning we must be spawning you must be spawning they must be spawning
Perfect
I must have spawned you must have spawned she must have spawned we must have spawned you must have spawned they must have spawned
V-ing perfect
I must have been spawning you must have been spawning she must have been spawning we must have been spawning you must have been spawning they must have been spawning
Negation
Simple form
I mustn't spawn you mustn't spawn she mustn't spawn we mustn't spawn you mustn't spawn they mustn't spawn
V-ing form
I mustn't be spawning you mustn't be spawning she mustn't be spawning we mustn't be spawning you mustn't be spawning they mustn't be spawning
Perfect
I mustn't have spawned you mustn't have spawned she mustn't have spawned we mustn't have spawned you mustn't have spawned they mustn't have spawned
V-ing perfect
I mustn't have been spawning you mustn't have been spawning she mustn't have been spawning we mustn't have been spawning you mustn't have been spawning they mustn't have been spawning
Interrogative form
Simple form
must I spawn? must you spawn? must she spawn? must we spawn? must you spawn? must they spawn?
V-ing form
must I be spawning? must you be spawning? must she be spawning? must we be spawning? must you be spawning? must they be spawning?
Perfect
must I have spawned? must you have spawned? must she have spawned? must we have spawned? must you have spawned? must they have spawned?
V-ing perfect
must I have been spawning? must you have been spawning? must she have been spawning? must we have been spawning? must you have been spawning? must they have been spawning?
Interro-negative form
Simple form
mustn't I spawn? mustn't you spawn? mustn't she spawn? mustn't we spawn? mustn't you spawn? mustn't they spawn?
V-ing form
mustn't I be spawning? mustn't you be spawning? mustn't she be spawning? mustn't we be spawning? mustn't you be spawning? mustn't they be spawning?
Perfect
mustn't I have spawned? mustn't you have spawned? mustn't she have spawned? mustn't we have spawned? mustn't you have spawned? mustn't they have spawned?
V-ing perfect
mustn't I have been spawning? mustn't you have been spawning? mustn't she have been spawning? mustn't we have been spawning? mustn't you have been spawning? mustn't they have been spawning?