may hammer
Regular verb: hammer - hammered- hammered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may hammer
you may hammer
she may hammer
we may hammer
you may hammer
they may hammer 	I may be hammering
you may be hammering
she may be hammering
we may be hammering
you may be hammering
they may be hammering	I may have hammered
you may have hammered
she may have hammered
we may have hammered
you may have hammered
they may have hammered	I may have been hammering
you may have been hammering
she may have been hammering
we may have been hammering
you may have been hammering
they may have been hammering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't hammer
you mayn't hammer
she mayn't hammer
we mayn't hammer
you mayn't hammer
they mayn't hammer 	I mayn't be hammering
you mayn't be hammering
she mayn't be hammering
we mayn't be hammering
you mayn't be hammering
they mayn't be hammering	I mayn't have hammered
you mayn't have hammered
she mayn't have hammered
we mayn't have hammered
you mayn't have hammered
they mayn't have hammered	I mayn't have been hammering
you mayn't have been hammering
she mayn't have been hammering
we mayn't have been hammering
you mayn't have been hammering
they mayn't have been hammering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I hammer?
may you hammer?
may she hammer?
may we hammer?
may you hammer?
may they hammer? 	may I be hammering?
may you be hammering?
may she be hammering?
may we be hammering?
may you be hammering?
may they be hammering? 	may I have hammered?
may you have hammered?
may she have hammered?
may we have hammered?
may you have hammered?
may they have hammered? 	may I have been hammering?
may you have been hammering?
may she have been hammering?
may we have been hammering?
may you have been hammering?
may they have been hammering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I hammer?
mayn't you hammer?
mayn't she hammer?
mayn't we hammer?
mayn't you hammer?
mayn't they hammer? 	mayn't I be hammering?
mayn't you be hammering?
mayn't she be hammering?
mayn't we be hammering?
mayn't you be hammering?
mayn't they be hammering? 	mayn't I have hammered?
mayn't you have hammered?
mayn't she have hammered?
mayn't we have hammered?
mayn't you have hammered?
mayn't they have hammered? 	mayn't I have been hammering?
mayn't you have been hammering?
mayn't she have been hammering?
mayn't we have been hammering?
mayn't you have been hammering?
mayn't they have been hammering?