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