may howl
Regular verb: howl - howled- howled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may howl
you may howl
he may howl
we may howl
you may howl
they may howl 	I may be howling
you may be howling
he may be howling
we may be howling
you may be howling
they may be howling	I may have howled
you may have howled
he may have howled
we may have howled
you may have howled
they may have howled	I may have been howling
you may have been howling
he may have been howling
we may have been howling
you may have been howling
they may have been howling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not howl
you may not howl
he may not howl
we may not howl
you may not howl
they may not howl 	I may not be howling
you may not be howling
he may not be howling
we may not be howling
you may not be howling
they may not be howling	I may not have howled
you may not have howled
he may not have howled
we may not have howled
you may not have howled
they may not have howled	I may not have been howling
you may not have been howling
he may not have been howling
we may not have been howling
you may not have been howling
they may not have been howling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I howl?
may you howl?
may he howl?
may we howl?
may you howl?
may they howl? 	may I be howling?
may you be howling?
may he be howling?
may we be howling?
may you be howling?
may they be howling? 	may I have howled?
may you have howled?
may he have howled?
may we have howled?
may you have howled?
may they have howled? 	may I have been howling?
may you have been howling?
may he have been howling?
may we have been howling?
may you have been howling?
may they have been howling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not howl?
may you not howl?
may he not howl?
may we not howl?
may you not howl?
may they not howl? 	may I not be howling?
may you not be howling?
may he not be howling?
may we not be howling?
may you not be howling?
may they not be howling? 	may I not have howled?
may you not have howled?
may he not have howled?
may we not have howled?
may you not have howled?
may they not have howled? 	may I not have been howling?
may you not have been howling?
may he not have been howling?
may we not have been howling?
may you not have been howling?
may they not have been howling?