must yes
Regular verb: yes - yesed- yesed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must yes
you must yes
he must yes
we must yes
you must yes
they must yes 	I must be yesing
you must be yesing
he must be yesing
we must be yesing
you must be yesing
they must be yesing	I must have yesed
you must have yesed
he must have yesed
we must have yesed
you must have yesed
they must have yesed	I must have been yesing
you must have been yesing
he must have been yesing
we must have been yesing
you must have been yesing
they must have been yesing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not yes
you must not yes
he must not yes
we must not yes
you must not yes
they must not yes 	I must not be yesing
you must not be yesing
he must not be yesing
we must not be yesing
you must not be yesing
they must not be yesing	I must not have yesed
you must not have yesed
he must not have yesed
we must not have yesed
you must not have yesed
they must not have yesed	I must not have been yesing
you must not have been yesing
he must not have been yesing
we must not have been yesing
you must not have been yesing
they must not have been yesing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I yes?
must you yes?
must he yes?
must we yes?
must you yes?
must they yes? 	must I be yesing?
must you be yesing?
must he be yesing?
must we be yesing?
must you be yesing?
must they be yesing? 	must I have yesed?
must you have yesed?
must he have yesed?
must we have yesed?
must you have yesed?
must they have yesed? 	must I have been yesing?
must you have been yesing?
must he have been yesing?
must we have been yesing?
must you have been yesing?
must they have been yesing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not yes?
must you not yes?
must he not yes?
must we not yes?
must you not yes?
must they not yes? 	must I not be yesing?
must you not be yesing?
must he not be yesing?
must we not be yesing?
must you not be yesing?
must they not be yesing? 	must I not have yesed?
must you not have yesed?
must he not have yesed?
must we not have yesed?
must you not have yesed?
must they not have yesed? 	must I not have been yesing?
must you not have been yesing?
must he not have been yesing?
must we not have been yesing?
must you not have been yesing?
must they not have been yesing?