may plumb
Regular verb: plumb - plumbed- plumbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may plumb
you may plumb
she may plumb
we may plumb
you may plumb
they may plumb 	I may be plumbing
you may be plumbing
she may be plumbing
we may be plumbing
you may be plumbing
they may be plumbing	I may have plumbed
you may have plumbed
she may have plumbed
we may have plumbed
you may have plumbed
they may have plumbed	I may have been plumbing
you may have been plumbing
she may have been plumbing
we may have been plumbing
you may have been plumbing
they may have been plumbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not plumb
you may not plumb
she may not plumb
we may not plumb
you may not plumb
they may not plumb 	I may not be plumbing
you may not be plumbing
she may not be plumbing
we may not be plumbing
you may not be plumbing
they may not be plumbing	I may not have plumbed
you may not have plumbed
she may not have plumbed
we may not have plumbed
you may not have plumbed
they may not have plumbed	I may not have been plumbing
you may not have been plumbing
she may not have been plumbing
we may not have been plumbing
you may not have been plumbing
they may not have been plumbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I plumb?
may you plumb?
may she plumb?
may we plumb?
may you plumb?
may they plumb? 	may I be plumbing?
may you be plumbing?
may she be plumbing?
may we be plumbing?
may you be plumbing?
may they be plumbing? 	may I have plumbed?
may you have plumbed?
may she have plumbed?
may we have plumbed?
may you have plumbed?
may they have plumbed? 	may I have been plumbing?
may you have been plumbing?
may she have been plumbing?
may we have been plumbing?
may you have been plumbing?
may they have been plumbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not plumb?
may you not plumb?
may she not plumb?
may we not plumb?
may you not plumb?
may they not plumb? 	may I not be plumbing?
may you not be plumbing?
may she not be plumbing?
may we not be plumbing?
may you not be plumbing?
may they not be plumbing? 	may I not have plumbed?
may you not have plumbed?
may she not have plumbed?
may we not have plumbed?
may you not have plumbed?
may they not have plumbed? 	may I not have been plumbing?
may you not have been plumbing?
may she not have been plumbing?
may we not have been plumbing?
may you not have been plumbing?
may they not have been plumbing?