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 must not school
you must not school
he must not school
we must not school
you must not school
they must not school 	I must not be schooling
you must not be schooling
he must not be schooling
we must not be schooling
you must not be schooling
they must not be schooling	I must not have schooled
you must not have schooled
he must not have schooled
we must not have schooled
you must not have schooled
they must not have schooled	I must not have been schooling
you must not have been schooling
he must not have been schooling
we must not have been schooling
you must not have been schooling
they must not 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 	
must I not school?
must you not school?
must he not school?
must we not school?
must you not school?
must they not school? 	must I not be schooling?
must you not be schooling?
must he not be schooling?
must we not be schooling?
must you not be schooling?
must they not be schooling? 	must I not have schooled?
must you not have schooled?
must he not have schooled?
must we not have schooled?
must you not have schooled?
must they not have schooled? 	must I not have been schooling?
must you not have been schooling?
must he not have been schooling?
must we not have been schooling?
must you not have been schooling?
must they not have been schooling?