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