English verb conjugation
MAY TUBE

Regular verb: tube - tubed - tubed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?