must school
Regular verb: school - schooled- schooled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must school
you must school
he must school
we must school
you must school
they must school 	I must be schooling
you must be schooling
he must be schooling
we must be schooling
you must be schooling
they must be schooling	I must have schooled
you must have schooled
he must have schooled
we must have schooled
you must have schooled
they must have schooled	I must have been schooling
you must have been schooling
he must have been schooling
we must have been schooling
you must have been schooling
they must have been schooling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't school
you mustn't school
he mustn't school
we mustn't school
you mustn't school
they mustn't school 	I mustn't be schooling
you mustn't be schooling
he mustn't be schooling
we mustn't be schooling
you mustn't be schooling
they mustn't be schooling	I mustn't have schooled
you mustn't have schooled
he mustn't have schooled
we mustn't have schooled
you mustn't have schooled
they mustn't have schooled	I mustn't have been schooling
you mustn't have been schooling
he mustn't have been schooling
we mustn't have been schooling
you mustn't have been schooling
they mustn't have been schooling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I school?
must you school?
must he school?
must we school?
must you school?
must they school? 	must I be schooling?
must you be schooling?
must he be schooling?
must we be schooling?
must you be schooling?
must they be schooling? 	must I have schooled?
must you have schooled?
must he have schooled?
must we have schooled?
must you have schooled?
must they have schooled? 	must I have been schooling?
must you have been schooling?
must he have been schooling?
must we have been schooling?
must you have been schooling?
must they have been schooling? 	

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