must scour
Regular verb: scour - scoured- scoured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scour
you must scour
she must scour
we must scour
you must scour
they must scour 	I must be scouring
you must be scouring
she must be scouring
we must be scouring
you must be scouring
they must be scouring	I must have scoured
you must have scoured
she must have scoured
we must have scoured
you must have scoured
they must have scoured	I must have been scouring
you must have been scouring
she must have been scouring
we must have been scouring
you must have been scouring
they must have been scouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not scour
you must not scour
she must not scour
we must not scour
you must not scour
they must not scour 	I must not be scouring
you must not be scouring
she must not be scouring
we must not be scouring
you must not be scouring
they must not be scouring	I must not have scoured
you must not have scoured
she must not have scoured
we must not have scoured
you must not have scoured
they must not have scoured	I must not have been scouring
you must not have been scouring
she must not have been scouring
we must not have been scouring
you must not have been scouring
they must not have been scouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scour?
must you scour?
must she scour?
must we scour?
must you scour?
must they scour? 	must I be scouring?
must you be scouring?
must she be scouring?
must we be scouring?
must you be scouring?
must they be scouring? 	must I have scoured?
must you have scoured?
must she have scoured?
must we have scoured?
must you have scoured?
must they have scoured? 	must I have been scouring?
must you have been scouring?
must she have been scouring?
must we have been scouring?
must you have been scouring?
must they have been scouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not scour?
must you not scour?
must she not scour?
must we not scour?
must you not scour?
must they not scour? 	must I not be scouring?
must you not be scouring?
must she not be scouring?
must we not be scouring?
must you not be scouring?
must they not be scouring? 	must I not have scoured?
must you not have scoured?
must she not have scoured?
must we not have scoured?
must you not have scoured?
must they not have scoured? 	must I not have been scouring?
must you not have been scouring?
must she not have been scouring?
must we not have been scouring?
must you not have been scouring?
must they not have been scouring?