may check
Regular verb: check - checked- checked

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