must ko
Regular verb: ko - koed- koed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ko
you must ko
he must ko
we must ko
you must ko
they must ko 	I must be koing
you must be koing
he must be koing
we must be koing
you must be koing
they must be koing	I must have koed
you must have koed
he must have koed
we must have koed
you must have koed
they must have koed	I must have been koing
you must have been koing
he must have been koing
we must have been koing
you must have been koing
they must have been koing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not ko
you must not ko
he must not ko
we must not ko
you must not ko
they must not ko 	I must not be koing
you must not be koing
he must not be koing
we must not be koing
you must not be koing
they must not be koing	I must not have koed
you must not have koed
he must not have koed
we must not have koed
you must not have koed
they must not have koed	I must not have been koing
you must not have been koing
he must not have been koing
we must not have been koing
you must not have been koing
they must not have been koing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I ko?
must you ko?
must he ko?
must we ko?
must you ko?
must they ko? 	must I be koing?
must you be koing?
must he be koing?
must we be koing?
must you be koing?
must they be koing? 	must I have koed?
must you have koed?
must he have koed?
must we have koed?
must you have koed?
must they have koed? 	must I have been koing?
must you have been koing?
must he have been koing?
must we have been koing?
must you have been koing?
must they have been koing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not ko?
must you not ko?
must he not ko?
must we not ko?
must you not ko?
must they not ko? 	must I not be koing?
must you not be koing?
must he not be koing?
must we not be koing?
must you not be koing?
must they not be koing? 	must I not have koed?
must you not have koed?
must he not have koed?
must we not have koed?
must you not have koed?
must they not have koed? 	must I not have been koing?
must you not have been koing?
must he not have been koing?
must we not have been koing?
must you not have been koing?
must they not have been koing?