may tube
Regular verb: tube - tubed- tubed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may tube
you may tube
he may tube
we may tube
you may tube
they may tube 	I may be tubing
you may be tubing
he may be tubing
we may be tubing
you may be tubing
they may be tubing	I may have tubed
you may have tubed
he may have tubed
we may have tubed
you may have tubed
they may have tubed	I may have been tubing
you may have been tubing
he may have been tubing
we may have been tubing
you may have been tubing
they may have been tubing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't tube
you mayn't tube
he mayn't tube
we mayn't tube
you mayn't tube
they mayn't tube 	I mayn't be tubing
you mayn't be tubing
he mayn't be tubing
we mayn't be tubing
you mayn't be tubing
they mayn't be tubing	I mayn't have tubed
you mayn't have tubed
he mayn't have tubed
we mayn't have tubed
you mayn't have tubed
they mayn't have tubed	I mayn't have been tubing
you mayn't have been tubing
he mayn't have been tubing
we mayn't have been tubing
you mayn't have been tubing
they mayn't have been tubing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I tube?
may you tube?
may he tube?
may we tube?
may you tube?
may they tube? 	may I be tubing?
may you be tubing?
may he be tubing?
may we be tubing?
may you be tubing?
may they be tubing? 	may I have tubed?
may you have tubed?
may he have tubed?
may we have tubed?
may you have tubed?
may they have tubed? 	may I have been tubing?
may you have been tubing?
may he have been tubing?
may we have been tubing?
may you have been tubing?
may they have been tubing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I tube?
mayn't you tube?
mayn't he tube?
mayn't we tube?
mayn't you tube?
mayn't they tube? 	mayn't I be tubing?
mayn't you be tubing?
mayn't he be tubing?
mayn't we be tubing?
mayn't you be tubing?
mayn't they be tubing? 	mayn't I have tubed?
mayn't you have tubed?
mayn't he have tubed?
mayn't we have tubed?
mayn't you have tubed?
mayn't they have tubed? 	mayn't I have been tubing?
mayn't you have been tubing?
mayn't he have been tubing?
mayn't we have been tubing?
mayn't you have been tubing?
mayn't they have been tubing?