may underrate
Regular verb: underrate - underrated- underrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may underrate
you may underrate
he may underrate
we may underrate
you may underrate
they may underrate 	I may be underrating
you may be underrating
he may be underrating
we may be underrating
you may be underrating
they may be underrating	I may have underrated
you may have underrated
he may have underrated
we may have underrated
you may have underrated
they may have underrated	I may have been underrating
you may have been underrating
he may have been underrating
we may have been underrating
you may have been underrating
they may have been underrating	

Negation 	
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I mayn't underrate
you mayn't underrate
he mayn't underrate
we mayn't underrate
you mayn't underrate
they mayn't underrate 	I mayn't be underrating
you mayn't be underrating
he mayn't be underrating
we mayn't be underrating
you mayn't be underrating
they mayn't be underrating	I mayn't have underrated
you mayn't have underrated
he mayn't have underrated
we mayn't have underrated
you mayn't have underrated
they mayn't have underrated	I mayn't have been underrating
you mayn't have been underrating
he mayn't have been underrating
we mayn't have been underrating
you mayn't have been underrating
they mayn't have been underrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I underrate?
may you underrate?
may he underrate?
may we underrate?
may you underrate?
may they underrate? 	may I be underrating?
may you be underrating?
may he be underrating?
may we be underrating?
may you be underrating?
may they be underrating? 	may I have underrated?
may you have underrated?
may he have underrated?
may we have underrated?
may you have underrated?
may they have underrated? 	may I have been underrating?
may you have been underrating?
may he have been underrating?
may we have been underrating?
may you have been underrating?
may they have been underrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I underrate?
mayn't you underrate?
mayn't he underrate?
mayn't we underrate?
mayn't you underrate?
mayn't they underrate? 	mayn't I be underrating?
mayn't you be underrating?
mayn't he be underrating?
mayn't we be underrating?
mayn't you be underrating?
mayn't they be underrating? 	mayn't I have underrated?
mayn't you have underrated?
mayn't he have underrated?
mayn't we have underrated?
mayn't you have underrated?
mayn't they have underrated? 	mayn't I have been underrating?
mayn't you have been underrating?
mayn't he have been underrating?
mayn't we have been underrating?
mayn't you have been underrating?
mayn't they have been underrating?