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