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