I must puke you must puke he must puke we must puke you must puke they must puke
V-ing form
I must be puking you must be puking he must be puking we must be puking you must be puking they must be puking
Perfect
I must have puked you must have puked he must have puked we must have puked you must have puked they must have puked
V-ing perfect
I must have been puking you must have been puking he must have been puking we must have been puking you must have been puking they must have been puking
Negation
Simple form
I must not puke you must not puke he must not puke we must not puke you must not puke they must not puke
V-ing form
I must not be puking you must not be puking he must not be puking we must not be puking you must not be puking they must not be puking
Perfect
I must not have puked you must not have puked he must not have puked we must not have puked you must not have puked they must not have puked
V-ing perfect
I must not have been puking you must not have been puking he must not have been puking we must not have been puking you must not have been puking they must not have been puking
Interrogative form
Simple form
must I puke? must you puke? must he puke? must we puke? must you puke? must they puke?
V-ing form
must I be puking? must you be puking? must he be puking? must we be puking? must you be puking? must they be puking?
Perfect
must I have puked? must you have puked? must he have puked? must we have puked? must you have puked? must they have puked?
V-ing perfect
must I have been puking? must you have been puking? must he have been puking? must we have been puking? must you have been puking? must they have been puking?
Interro-negative form
Simple form
must I not puke? must you not puke? must he not puke? must we not puke? must you not puke? must they not puke?
V-ing form
must I not be puking? must you not be puking? must he not be puking? must we not be puking? must you not be puking? must they not be puking?
Perfect
must I not have puked? must you not have puked? must he not have puked? must we not have puked? must you not have puked? must they not have puked?
V-ing perfect
must I not have been puking? must you not have been puking? must he not have been puking? must we not have been puking? must you not have been puking? must they not have been puking?