must run
Irregular verb: run - ran- run

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must run
you must run
he must run
we must run
you must run
they must run 	I must be running
you must be running
he must be running
we must be running
you must be running
they must be running	I must have run
you must have run
he must have run
we must have run
you must have run
they must have run	I must have been running
you must have been running
he must have been running
we must have been running
you must have been running
they must have been running	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't run
you mustn't run
he mustn't run
we mustn't run
you mustn't run
they mustn't run 	I mustn't be running
you mustn't be running
he mustn't be running
we mustn't be running
you mustn't be running
they mustn't be running	I mustn't have run
you mustn't have run
he mustn't have run
we mustn't have run
you mustn't have run
they mustn't have run	I mustn't have been running
you mustn't have been running
he mustn't have been running
we mustn't have been running
you mustn't have been running
they mustn't have been running	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I run?
must you run?
must he run?
must we run?
must you run?
must they run? 	must I be running?
must you be running?
must he be running?
must we be running?
must you be running?
must they be running? 	must I have run?
must you have run?
must he have run?
must we have run?
must you have run?
must they have run? 	must I have been running?
must you have been running?
must he have been running?
must we have been running?
must you have been running?
must they have been running? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I run?
mustn't you run?
mustn't he run?
mustn't we run?
mustn't you run?
mustn't they run? 	mustn't I be running?
mustn't you be running?
mustn't he be running?
mustn't we be running?
mustn't you be running?
mustn't they be running? 	mustn't I have run?
mustn't you have run?
mustn't he have run?
mustn't we have run?
mustn't you have run?
mustn't they have run? 	mustn't I have been running?
mustn't you have been running?
mustn't he have been running?
mustn't we have been running?
mustn't you have been running?
mustn't they have been running?