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 must not approve you must not approve he must not approve we must not approve you must not approve they must not approve
V-ing form
I must not be approving you must not be approving he must not be approving we must not be approving you must not be approving they must not be approving
Perfect
I must not have approved you must not have approved he must not have approved we must not have approved you must not have approved they must not have approved
V-ing perfect
I must not have been approving you must not have been approving he must not have been approving we must not have been approving you must not have been approving they must not 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
must I not approve? must you not approve? must he not approve? must we not approve? must you not approve? must they not approve?
V-ing form
must I not be approving? must you not be approving? must he not be approving? must we not be approving? must you not be approving? must they not be approving?
Perfect
must I not have approved? must you not have approved? must he not have approved? must we not have approved? must you not have approved? must they not have approved?
V-ing perfect
must I not have been approving? must you not have been approving? must he not have been approving? must we not have been approving? must you not have been approving? must they not have been approving?