must succour
Regular verb: succour - succoured- succoured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must succour
you must succour
he must succour
we must succour
you must succour
they must succour 	I must be succouring
you must be succouring
he must be succouring
we must be succouring
you must be succouring
they must be succouring	I must have succoured
you must have succoured
he must have succoured
we must have succoured
you must have succoured
they must have succoured	I must have been succouring
you must have been succouring
he must have been succouring
we must have been succouring
you must have been succouring
they must have been succouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not succour
you must not succour
he must not succour
we must not succour
you must not succour
they must not succour 	I must not be succouring
you must not be succouring
he must not be succouring
we must not be succouring
you must not be succouring
they must not be succouring	I must not have succoured
you must not have succoured
he must not have succoured
we must not have succoured
you must not have succoured
they must not have succoured	I must not have been succouring
you must not have been succouring
he must not have been succouring
we must not have been succouring
you must not have been succouring
they must not have been succouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I succour?
must you succour?
must he succour?
must we succour?
must you succour?
must they succour? 	must I be succouring?
must you be succouring?
must he be succouring?
must we be succouring?
must you be succouring?
must they be succouring? 	must I have succoured?
must you have succoured?
must he have succoured?
must we have succoured?
must you have succoured?
must they have succoured? 	must I have been succouring?
must you have been succouring?
must he have been succouring?
must we have been succouring?
must you have been succouring?
must they have been succouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not succour?
must you not succour?
must he not succour?
must we not succour?
must you not succour?
must they not succour? 	must I not be succouring?
must you not be succouring?
must he not be succouring?
must we not be succouring?
must you not be succouring?
must they not be succouring? 	must I not have succoured?
must you not have succoured?
must he not have succoured?
must we not have succoured?
must you not have succoured?
must they not have succoured? 	must I not have been succouring?
must you not have been succouring?
must he not have been succouring?
must we not have been succouring?
must you not have been succouring?
must they not have been succouring?