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