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 mustn't puke you mustn't puke he mustn't puke we mustn't puke you mustn't puke they mustn't puke
V-ing form
I mustn't be puking you mustn't be puking he mustn't be puking we mustn't be puking you mustn't be puking they mustn't be puking
Perfect
I mustn't have puked you mustn't have puked he mustn't have puked we mustn't have puked you mustn't have puked they mustn't have puked
V-ing perfect
I mustn't have been puking you mustn't have been puking he mustn't have been puking we mustn't have been puking you mustn't have been puking they mustn't 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
mustn't I puke? mustn't you puke? mustn't he puke? mustn't we puke? mustn't you puke? mustn't they puke?
V-ing form
mustn't I be puking? mustn't you be puking? mustn't he be puking? mustn't we be puking? mustn't you be puking? mustn't they be puking?
Perfect
mustn't I have puked? mustn't you have puked? mustn't he have puked? mustn't we have puked? mustn't you have puked? mustn't they have puked?
V-ing perfect
mustn't I have been puking? mustn't you have been puking? mustn't he have been puking? mustn't we have been puking? mustn't you have been puking? mustn't they have been puking?