I must medicine you must medicine he must medicine we must medicine you must medicine they must medicine
V-ing form
I must be medicining you must be medicining he must be medicining we must be medicining you must be medicining they must be medicining
Perfect
I must have medicined you must have medicined he must have medicined we must have medicined you must have medicined they must have medicined
V-ing perfect
I must have been medicining you must have been medicining he must have been medicining we must have been medicining you must have been medicining they must have been medicining
Negation
Simple form
I mustn't medicine you mustn't medicine he mustn't medicine we mustn't medicine you mustn't medicine they mustn't medicine
V-ing form
I mustn't be medicining you mustn't be medicining he mustn't be medicining we mustn't be medicining you mustn't be medicining they mustn't be medicining
Perfect
I mustn't have medicined you mustn't have medicined he mustn't have medicined we mustn't have medicined you mustn't have medicined they mustn't have medicined
V-ing perfect
I mustn't have been medicining you mustn't have been medicining he mustn't have been medicining we mustn't have been medicining you mustn't have been medicining they mustn't have been medicining
Interrogative form
Simple form
must I medicine? must you medicine? must he medicine? must we medicine? must you medicine? must they medicine?
V-ing form
must I be medicining? must you be medicining? must he be medicining? must we be medicining? must you be medicining? must they be medicining?
Perfect
must I have medicined? must you have medicined? must he have medicined? must we have medicined? must you have medicined? must they have medicined?
V-ing perfect
must I have been medicining? must you have been medicining? must he have been medicining? must we have been medicining? must you have been medicining? must they have been medicining?
Interro-negative form
Simple form
mustn't I medicine? mustn't you medicine? mustn't he medicine? mustn't we medicine? mustn't you medicine? mustn't they medicine?
V-ing form
mustn't I be medicining? mustn't you be medicining? mustn't he be medicining? mustn't we be medicining? mustn't you be medicining? mustn't they be medicining?
Perfect
mustn't I have medicined? mustn't you have medicined? mustn't he have medicined? mustn't we have medicined? mustn't you have medicined? mustn't they have medicined?
V-ing perfect
mustn't I have been medicining? mustn't you have been medicining? mustn't he have been medicining? mustn't we have been medicining? mustn't you have been medicining? mustn't they have been medicining?