may preinstruct
Regular verb: preinstruct - preinstructed- preinstructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may preinstruct
you may preinstruct
he may preinstruct
we may preinstruct
you may preinstruct
they may preinstruct 	I may be preinstructing
you may be preinstructing
he may be preinstructing
we may be preinstructing
you may be preinstructing
they may be preinstructing	I may have preinstructed
you may have preinstructed
he 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
he 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
he 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
he 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
he 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
he 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 he preinstruct?
may we preinstruct?
may you preinstruct?
may they preinstruct? 	may I be preinstructing?
may you be preinstructing?
may he be preinstructing?
may we be preinstructing?
may you be preinstructing?
may they be preinstructing? 	may I have preinstructed?
may you have preinstructed?
may he 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 he 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 he 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 he 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 he 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 he have been preinstructing?
mayn't we have been preinstructing?
mayn't you have been preinstructing?
mayn't they have been preinstructing?