I must mushroom you must mushroom he must mushroom we must mushroom you must mushroom they must mushroom
V-ing form
I must be mushrooming you must be mushrooming he must be mushrooming we must be mushrooming you must be mushrooming they must be mushrooming
Perfect
I must have mushroomed you must have mushroomed he must have mushroomed we must have mushroomed you must have mushroomed they must have mushroomed
V-ing perfect
I must have been mushrooming you must have been mushrooming he must have been mushrooming we must have been mushrooming you must have been mushrooming they must have been mushrooming
Negation
Simple form
I must not mushroom you must not mushroom he must not mushroom we must not mushroom you must not mushroom they must not mushroom
V-ing form
I must not be mushrooming you must not be mushrooming he must not be mushrooming we must not be mushrooming you must not be mushrooming they must not be mushrooming
Perfect
I must not have mushroomed you must not have mushroomed he must not have mushroomed we must not have mushroomed you must not have mushroomed they must not have mushroomed
V-ing perfect
I must not have been mushrooming you must not have been mushrooming he must not have been mushrooming we must not have been mushrooming you must not have been mushrooming they must not have been mushrooming
Interrogative form
Simple form
must I mushroom? must you mushroom? must he mushroom? must we mushroom? must you mushroom? must they mushroom?
V-ing form
must I be mushrooming? must you be mushrooming? must he be mushrooming? must we be mushrooming? must you be mushrooming? must they be mushrooming?
Perfect
must I have mushroomed? must you have mushroomed? must he have mushroomed? must we have mushroomed? must you have mushroomed? must they have mushroomed?
V-ing perfect
must I have been mushrooming? must you have been mushrooming? must he have been mushrooming? must we have been mushrooming? must you have been mushrooming? must they have been mushrooming?
Interro-negative form
Simple form
must I not mushroom? must you not mushroom? must he not mushroom? must we not mushroom? must you not mushroom? must they not mushroom?
V-ing form
must I not be mushrooming? must you not be mushrooming? must he not be mushrooming? must we not be mushrooming? must you not be mushrooming? must they not be mushrooming?
Perfect
must I not have mushroomed? must you not have mushroomed? must he not have mushroomed? must we not have mushroomed? must you not have mushroomed? must they not have mushroomed?
V-ing perfect
must I not have been mushrooming? must you not have been mushrooming? must he not have been mushrooming? must we not have been mushrooming? must you not have been mushrooming? must they not have been mushrooming?