I must sucker you must sucker he must sucker we must sucker you must sucker they must sucker
V-ing form
I must be suckering you must be suckering he must be suckering we must be suckering you must be suckering they must be suckering
Perfect
I must have suckered you must have suckered he must have suckered we must have suckered you must have suckered they must have suckered
V-ing perfect
I must have been suckering you must have been suckering he must have been suckering we must have been suckering you must have been suckering they must have been suckering
Negation
Simple form
I must not sucker you must not sucker he must not sucker we must not sucker you must not sucker they must not sucker
V-ing form
I must not be suckering you must not be suckering he must not be suckering we must not be suckering you must not be suckering they must not be suckering
Perfect
I must not have suckered you must not have suckered he must not have suckered we must not have suckered you must not have suckered they must not have suckered
V-ing perfect
I must not have been suckering you must not have been suckering he must not have been suckering we must not have been suckering you must not have been suckering they must not have been suckering
Interrogative form
Simple form
must I sucker? must you sucker? must he sucker? must we sucker? must you sucker? must they sucker?
V-ing form
must I be suckering? must you be suckering? must he be suckering? must we be suckering? must you be suckering? must they be suckering?
Perfect
must I have suckered? must you have suckered? must he have suckered? must we have suckered? must you have suckered? must they have suckered?
V-ing perfect
must I have been suckering? must you have been suckering? must he have been suckering? must we have been suckering? must you have been suckering? must they have been suckering?
Interro-negative form
Simple form
must I not sucker? must you not sucker? must he not sucker? must we not sucker? must you not sucker? must they not sucker?
V-ing form
must I not be suckering? must you not be suckering? must he not be suckering? must we not be suckering? must you not be suckering? must they not be suckering?
Perfect
must I not have suckered? must you not have suckered? must he not have suckered? must we not have suckered? must you not have suckered? must they not have suckered?
V-ing perfect
must I not have been suckering? must you not have been suckering? must he not have been suckering? must we not have been suckering? must you not have been suckering? must they not have been suckering?