may drub
Regular verb: drub - drubbed- drubbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may drub
you may drub
she may drub
we may drub
you may drub
they may drub 	I may be drubbing
you may be drubbing
she may be drubbing
we may be drubbing
you may be drubbing
they may be drubbing	I may have drubbed
you may have drubbed
she may have drubbed
we may have drubbed
you may have drubbed
they may have drubbed	I may have been drubbing
you may have been drubbing
she may have been drubbing
we may have been drubbing
you may have been drubbing
they may have been drubbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not drub
you may not drub
she may not drub
we may not drub
you may not drub
they may not drub 	I may not be drubbing
you may not be drubbing
she may not be drubbing
we may not be drubbing
you may not be drubbing
they may not be drubbing	I may not have drubbed
you may not have drubbed
she may not have drubbed
we may not have drubbed
you may not have drubbed
they may not have drubbed	I may not have been drubbing
you may not have been drubbing
she may not have been drubbing
we may not have been drubbing
you may not have been drubbing
they may not have been drubbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I drub?
may you drub?
may she drub?
may we drub?
may you drub?
may they drub? 	may I be drubbing?
may you be drubbing?
may she be drubbing?
may we be drubbing?
may you be drubbing?
may they be drubbing? 	may I have drubbed?
may you have drubbed?
may she have drubbed?
may we have drubbed?
may you have drubbed?
may they have drubbed? 	may I have been drubbing?
may you have been drubbing?
may she have been drubbing?
may we have been drubbing?
may you have been drubbing?
may they have been drubbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not drub?
may you not drub?
may she not drub?
may we not drub?
may you not drub?
may they not drub? 	may I not be drubbing?
may you not be drubbing?
may she not be drubbing?
may we not be drubbing?
may you not be drubbing?
may they not be drubbing? 	may I not have drubbed?
may you not have drubbed?
may she not have drubbed?
may we not have drubbed?
may you not have drubbed?
may they not have drubbed? 	may I not have been drubbing?
may you not have been drubbing?
may she not have been drubbing?
may we not have been drubbing?
may you not have been drubbing?
may they not have been drubbing?