may rack
Regular verb: rack - racked- racked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may rack
you may rack
he may rack
we may rack
you may rack
they may rack 	I may be racking
you may be racking
he may be racking
we may be racking
you may be racking
they may be racking	I may have racked
you may have racked
he may have racked
we may have racked
you may have racked
they may have racked	I may have been racking
you may have been racking
he may have been racking
we may have been racking
you may have been racking
they may have been racking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not rack
you may not rack
he may not rack
we may not rack
you may not rack
they may not rack 	I may not be racking
you may not be racking
he may not be racking
we may not be racking
you may not be racking
they may not be racking	I may not have racked
you may not have racked
he may not have racked
we may not have racked
you may not have racked
they may not have racked	I may not have been racking
you may not have been racking
he may not have been racking
we may not have been racking
you may not have been racking
they may not have been racking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I rack?
may you rack?
may he rack?
may we rack?
may you rack?
may they rack? 	may I be racking?
may you be racking?
may he be racking?
may we be racking?
may you be racking?
may they be racking? 	may I have racked?
may you have racked?
may he have racked?
may we have racked?
may you have racked?
may they have racked? 	may I have been racking?
may you have been racking?
may he have been racking?
may we have been racking?
may you have been racking?
may they have been racking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not rack?
may you not rack?
may he not rack?
may we not rack?
may you not rack?
may they not rack? 	may I not be racking?
may you not be racking?
may he not be racking?
may we not be racking?
may you not be racking?
may they not be racking? 	may I not have racked?
may you not have racked?
may he not have racked?
may we not have racked?
may you not have racked?
may they not have racked? 	may I not have been racking?
may you not have been racking?
may he not have been racking?
may we not have been racking?
may you not have been racking?
may they not have been racking?