I must restrain you must restrain he must restrain we must restrain you must restrain they must restrain
V-ing form
I must be restraining you must be restraining he must be restraining we must be restraining you must be restraining they must be restraining
Perfect
I must have restrained you must have restrained he must have restrained we must have restrained you must have restrained they must have restrained
V-ing perfect
I must have been restraining you must have been restraining he must have been restraining we must have been restraining you must have been restraining they must have been restraining
Negation
Simple form
I must not restrain you must not restrain he must not restrain we must not restrain you must not restrain they must not restrain
V-ing form
I must not be restraining you must not be restraining he must not be restraining we must not be restraining you must not be restraining they must not be restraining
Perfect
I must not have restrained you must not have restrained he must not have restrained we must not have restrained you must not have restrained they must not have restrained
V-ing perfect
I must not have been restraining you must not have been restraining he must not have been restraining we must not have been restraining you must not have been restraining they must not have been restraining
Interrogative form
Simple form
must I restrain? must you restrain? must he restrain? must we restrain? must you restrain? must they restrain?
V-ing form
must I be restraining? must you be restraining? must he be restraining? must we be restraining? must you be restraining? must they be restraining?
Perfect
must I have restrained? must you have restrained? must he have restrained? must we have restrained? must you have restrained? must they have restrained?
V-ing perfect
must I have been restraining? must you have been restraining? must he have been restraining? must we have been restraining? must you have been restraining? must they have been restraining?
Interro-negative form
Simple form
must I not restrain? must you not restrain? must he not restrain? must we not restrain? must you not restrain? must they not restrain?
V-ing form
must I not be restraining? must you not be restraining? must he not be restraining? must we not be restraining? must you not be restraining? must they not be restraining?
Perfect
must I not have restrained? must you not have restrained? must he not have restrained? must we not have restrained? must you not have restrained? must they not have restrained?
V-ing perfect
must I not have been restraining? must you not have been restraining? must he not have been restraining? must we not have been restraining? must you not have been restraining? must they not have been restraining?