I may endeavor you may endeavor he may endeavor we may endeavor you may endeavor they may endeavor
V-ing form
I may be endeavoring you may be endeavoring he may be endeavoring we may be endeavoring you may be endeavoring they may be endeavoring
Perfect
I may have endeavored you may have endeavored he may have endeavored we may have endeavored you may have endeavored they may have endeavored
V-ing perfect
I may have been endeavoring you may have been endeavoring he may have been endeavoring we may have been endeavoring you may have been endeavoring they may have been endeavoring
Negation
Simple form
I mayn't endeavor you mayn't endeavor he mayn't endeavor we mayn't endeavor you mayn't endeavor they mayn't endeavor
V-ing form
I mayn't be endeavoring you mayn't be endeavoring he mayn't be endeavoring we mayn't be endeavoring you mayn't be endeavoring they mayn't be endeavoring
Perfect
I mayn't have endeavored you mayn't have endeavored he mayn't have endeavored we mayn't have endeavored you mayn't have endeavored they mayn't have endeavored
V-ing perfect
I mayn't have been endeavoring you mayn't have been endeavoring he mayn't have been endeavoring we mayn't have been endeavoring you mayn't have been endeavoring they mayn't have been endeavoring
Interrogative form
Simple form
may I endeavor? may you endeavor? may he endeavor? may we endeavor? may you endeavor? may they endeavor?
V-ing form
may I be endeavoring? may you be endeavoring? may he be endeavoring? may we be endeavoring? may you be endeavoring? may they be endeavoring?
Perfect
may I have endeavored? may you have endeavored? may he have endeavored? may we have endeavored? may you have endeavored? may they have endeavored?
V-ing perfect
may I have been endeavoring? may you have been endeavoring? may he have been endeavoring? may we have been endeavoring? may you have been endeavoring? may they have been endeavoring?
Interro-negative form
Simple form
mayn't I endeavor? mayn't you endeavor? mayn't he endeavor? mayn't we endeavor? mayn't you endeavor? mayn't they endeavor?
V-ing form
mayn't I be endeavoring? mayn't you be endeavoring? mayn't he be endeavoring? mayn't we be endeavoring? mayn't you be endeavoring? mayn't they be endeavoring?
Perfect
mayn't I have endeavored? mayn't you have endeavored? mayn't he have endeavored? mayn't we have endeavored? mayn't you have endeavored? mayn't they have endeavored?
V-ing perfect
mayn't I have been endeavoring? mayn't you have been endeavoring? mayn't he have been endeavoring? mayn't we have been endeavoring? mayn't you have been endeavoring? mayn't they have been endeavoring?