may retrieve
Regular verb: retrieve - retrieved- retrieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may retrieve
you may retrieve
he may retrieve
we may retrieve
you may retrieve
they may retrieve 	I may be retrieving
you may be retrieving
he may be retrieving
we may be retrieving
you may be retrieving
they may be retrieving	I may have retrieved
you may have retrieved
he may have retrieved
we may have retrieved
you may have retrieved
they may have retrieved	I may have been retrieving
you may have been retrieving
he may have been retrieving
we may have been retrieving
you may have been retrieving
they may have been retrieving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't retrieve
you mayn't retrieve
he mayn't retrieve
we mayn't retrieve
you mayn't retrieve
they mayn't retrieve 	I mayn't be retrieving
you mayn't be retrieving
he mayn't be retrieving
we mayn't be retrieving
you mayn't be retrieving
they mayn't be retrieving	I mayn't have retrieved
you mayn't have retrieved
he mayn't have retrieved
we mayn't have retrieved
you mayn't have retrieved
they mayn't have retrieved	I mayn't have been retrieving
you mayn't have been retrieving
he mayn't have been retrieving
we mayn't have been retrieving
you mayn't have been retrieving
they mayn't have been retrieving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I retrieve?
may you retrieve?
may he retrieve?
may we retrieve?
may you retrieve?
may they retrieve? 	may I be retrieving?
may you be retrieving?
may he be retrieving?
may we be retrieving?
may you be retrieving?
may they be retrieving? 	may I have retrieved?
may you have retrieved?
may he have retrieved?
may we have retrieved?
may you have retrieved?
may they have retrieved? 	may I have been retrieving?
may you have been retrieving?
may he have been retrieving?
may we have been retrieving?
may you have been retrieving?
may they have been retrieving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I retrieve?
mayn't you retrieve?
mayn't he retrieve?
mayn't we retrieve?
mayn't you retrieve?
mayn't they retrieve? 	mayn't I be retrieving?
mayn't you be retrieving?
mayn't he be retrieving?
mayn't we be retrieving?
mayn't you be retrieving?
mayn't they be retrieving? 	mayn't I have retrieved?
mayn't you have retrieved?
mayn't he have retrieved?
mayn't we have retrieved?
mayn't you have retrieved?
mayn't they have retrieved? 	mayn't I have been retrieving?
mayn't you have been retrieving?
mayn't he have been retrieving?
mayn't we have been retrieving?
mayn't you have been retrieving?
mayn't they have been retrieving?