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