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