may penetrate
Regular verb: penetrate - penetrated- penetrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may penetrate
you may penetrate
he may penetrate
we may penetrate
you may penetrate
they may penetrate 	I may be penetrating
you may be penetrating
he may be penetrating
we may be penetrating
you may be penetrating
they may be penetrating	I may have penetrated
you may have penetrated
he may have penetrated
we may have penetrated
you may have penetrated
they may have penetrated	I may have been penetrating
you may have been penetrating
he may have been penetrating
we may have been penetrating
you may have been penetrating
they may have been penetrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't penetrate
you mayn't penetrate
he mayn't penetrate
we mayn't penetrate
you mayn't penetrate
they mayn't penetrate 	I mayn't be penetrating
you mayn't be penetrating
he mayn't be penetrating
we mayn't be penetrating
you mayn't be penetrating
they mayn't be penetrating	I mayn't have penetrated
you mayn't have penetrated
he mayn't have penetrated
we mayn't have penetrated
you mayn't have penetrated
they mayn't have penetrated	I mayn't have been penetrating
you mayn't have been penetrating
he mayn't have been penetrating
we mayn't have been penetrating
you mayn't have been penetrating
they mayn't have been penetrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I penetrate?
may you penetrate?
may he penetrate?
may we penetrate?
may you penetrate?
may they penetrate? 	may I be penetrating?
may you be penetrating?
may he be penetrating?
may we be penetrating?
may you be penetrating?
may they be penetrating? 	may I have penetrated?
may you have penetrated?
may he have penetrated?
may we have penetrated?
may you have penetrated?
may they have penetrated? 	may I have been penetrating?
may you have been penetrating?
may he have been penetrating?
may we have been penetrating?
may you have been penetrating?
may they have been penetrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I penetrate?
mayn't you penetrate?
mayn't he penetrate?
mayn't we penetrate?
mayn't you penetrate?
mayn't they penetrate? 	mayn't I be penetrating?
mayn't you be penetrating?
mayn't he be penetrating?
mayn't we be penetrating?
mayn't you be penetrating?
mayn't they be penetrating? 	mayn't I have penetrated?
mayn't you have penetrated?
mayn't he have penetrated?
mayn't we have penetrated?
mayn't you have penetrated?
mayn't they have penetrated? 	mayn't I have been penetrating?
mayn't you have been penetrating?
mayn't he have been penetrating?
mayn't we have been penetrating?
mayn't you have been penetrating?
mayn't they have been penetrating?