may overstrain
Regular verb: overstrain - overstrained- overstrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may overstrain
you may overstrain
he may overstrain
we may overstrain
you may overstrain
they may overstrain 	I may be overstraining
you may be overstraining
he may be overstraining
we may be overstraining
you may be overstraining
they may be overstraining	I may have overstrained
you may have overstrained
he may have overstrained
we may have overstrained
you may have overstrained
they may have overstrained	I may have been overstraining
you may have been overstraining
he may have been overstraining
we may have been overstraining
you may have been overstraining
they may have been overstraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't overstrain
you mayn't overstrain
he mayn't overstrain
we mayn't overstrain
you mayn't overstrain
they mayn't overstrain 	I mayn't be overstraining
you mayn't be overstraining
he mayn't be overstraining
we mayn't be overstraining
you mayn't be overstraining
they mayn't be overstraining	I mayn't have overstrained
you mayn't have overstrained
he mayn't have overstrained
we mayn't have overstrained
you mayn't have overstrained
they mayn't have overstrained	I mayn't have been overstraining
you mayn't have been overstraining
he mayn't have been overstraining
we mayn't have been overstraining
you mayn't have been overstraining
they mayn't have been overstraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I overstrain?
may you overstrain?
may he overstrain?
may we overstrain?
may you overstrain?
may they overstrain? 	may I be overstraining?
may you be overstraining?
may he be overstraining?
may we be overstraining?
may you be overstraining?
may they be overstraining? 	may I have overstrained?
may you have overstrained?
may he have overstrained?
may we have overstrained?
may you have overstrained?
may they have overstrained? 	may I have been overstraining?
may you have been overstraining?
may he have been overstraining?
may we have been overstraining?
may you have been overstraining?
may they have been overstraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I overstrain?
mayn't you overstrain?
mayn't he overstrain?
mayn't we overstrain?
mayn't you overstrain?
mayn't they overstrain? 	mayn't I be overstraining?
mayn't you be overstraining?
mayn't he be overstraining?
mayn't we be overstraining?
mayn't you be overstraining?
mayn't they be overstraining? 	mayn't I have overstrained?
mayn't you have overstrained?
mayn't he have overstrained?
mayn't we have overstrained?
mayn't you have overstrained?
mayn't they have overstrained? 	mayn't I have been overstraining?
mayn't you have been overstraining?
mayn't he have been overstraining?
mayn't we have been overstraining?
mayn't you have been overstraining?
mayn't they have been overstraining?