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