English verb conjugation
MAY CHECK

Regular verb: check - checked - checked

Affirmation

Simple form	V-ing form
I may check you may check he may check we may check you may check they may check	I may be checking you may be checking he may be checking we may be checking you may be checking they may be checking
Perfect	V-ing perfect
I may have checked you may have checked he may have checked we may have checked you may have checked they may have checked	I may have been checking you may have been checking he may have been checking we may have been checking you may have been checking they may have been checking

Negation

Simple form	V-ing form
I mayn't check you mayn't check he mayn't check we mayn't check you mayn't check they mayn't check	I mayn't be checking you mayn't be checking he mayn't be checking we mayn't be checking you mayn't be checking they mayn't be checking
Perfect	V-ing perfect
I mayn't have checked you mayn't have checked he mayn't have checked we mayn't have checked you mayn't have checked they mayn't have checked	I mayn't have been checking you mayn't have been checking he mayn't have been checking we mayn't have been checking you mayn't have been checking they mayn't have been checking

Interrogative form

Simple form	V-ing form
may I check? may you check? may he check? may we check? may you check? may they check?	may I be checking? may you be checking? may he be checking? may we be checking? may you be checking? may they be checking?
Perfect	V-ing perfect
may I have checked? may you have checked? may he have checked? may we have checked? may you have checked? may they have checked?	may I have been checking? may you have been checking? may he have been checking? may we have been checking? may you have been checking? may they have been checking?

Interro-negative form

Simple form	V-ing form
mayn't I check? mayn't you check? mayn't he check? mayn't we check? mayn't you check? mayn't they check?	mayn't I be checking? mayn't you be checking? mayn't he be checking? mayn't we be checking? mayn't you be checking? mayn't they be checking?
Perfect	V-ing perfect
mayn't I have checked? mayn't you have checked? mayn't he have checked? mayn't we have checked? mayn't you have checked? mayn't they have checked?	mayn't I have been checking? mayn't you have been checking? mayn't he have been checking? mayn't we have been checking? mayn't you have been checking? mayn't they have been checking?