may preinstruct
Regular verb: preinstruct - preinstructed- preinstructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may preinstruct
you may preinstruct
she may preinstruct
we may preinstruct
you may preinstruct
they may preinstruct 	I may be preinstructing
you may be preinstructing
she may be preinstructing
we may be preinstructing
you may be preinstructing
they may be preinstructing	I may have preinstructed
you may have preinstructed
she may have preinstructed
we may have preinstructed
you may have preinstructed
they may have preinstructed	I may have been preinstructing
you may have been preinstructing
she may have been preinstructing
we may have been preinstructing
you may have been preinstructing
they may have been preinstructing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't preinstruct
you mayn't preinstruct
she mayn't preinstruct
we mayn't preinstruct
you mayn't preinstruct
they mayn't preinstruct 	I mayn't be preinstructing
you mayn't be preinstructing
she mayn't be preinstructing
we mayn't be preinstructing
you mayn't be preinstructing
they mayn't be preinstructing	I mayn't have preinstructed
you mayn't have preinstructed
she mayn't have preinstructed
we mayn't have preinstructed
you mayn't have preinstructed
they mayn't have preinstructed	I mayn't have been preinstructing
you mayn't have been preinstructing
she mayn't have been preinstructing
we mayn't have been preinstructing
you mayn't have been preinstructing
they mayn't have been preinstructing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I preinstruct?
may you preinstruct?
may she preinstruct?
may we preinstruct?
may you preinstruct?
may they preinstruct? 	may I be preinstructing?
may you be preinstructing?
may she be preinstructing?
may we be preinstructing?
may you be preinstructing?
may they be preinstructing? 	may I have preinstructed?
may you have preinstructed?
may she have preinstructed?
may we have preinstructed?
may you have preinstructed?
may they have preinstructed? 	may I have been preinstructing?
may you have been preinstructing?
may she have been preinstructing?
may we have been preinstructing?
may you have been preinstructing?
may they have been preinstructing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I preinstruct?
mayn't you preinstruct?
mayn't she preinstruct?
mayn't we preinstruct?
mayn't you preinstruct?
mayn't they preinstruct? 	mayn't I be preinstructing?
mayn't you be preinstructing?
mayn't she be preinstructing?
mayn't we be preinstructing?
mayn't you be preinstructing?
mayn't they be preinstructing? 	mayn't I have preinstructed?
mayn't you have preinstructed?
mayn't she have preinstructed?
mayn't we have preinstructed?
mayn't you have preinstructed?
mayn't they have preinstructed? 	mayn't I have been preinstructing?
mayn't you have been preinstructing?
mayn't she have been preinstructing?
mayn't we have been preinstructing?
mayn't you have been preinstructing?
mayn't they have been preinstructing?