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