may retrain
Regular verb: retrain - retrained- retrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may retrain
you may retrain
he may retrain
we may retrain
you may retrain
they may retrain 	I may be retraining
you may be retraining
he may be retraining
we may be retraining
you may be retraining
they may be retraining	I may have retrained
you may have retrained
he may have retrained
we may have retrained
you may have retrained
they may have retrained	I may have been retraining
you may have been retraining
he may have been retraining
we may have been retraining
you may have been retraining
they may have been retraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't retrain
you mayn't retrain
he mayn't retrain
we mayn't retrain
you mayn't retrain
they mayn't retrain 	I mayn't be retraining
you mayn't be retraining
he mayn't be retraining
we mayn't be retraining
you mayn't be retraining
they mayn't be retraining	I mayn't have retrained
you mayn't have retrained
he mayn't have retrained
we mayn't have retrained
you mayn't have retrained
they mayn't have retrained	I mayn't have been retraining
you mayn't have been retraining
he mayn't have been retraining
we mayn't have been retraining
you mayn't have been retraining
they mayn't have been retraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I retrain?
may you retrain?
may he retrain?
may we retrain?
may you retrain?
may they retrain? 	may I be retraining?
may you be retraining?
may he be retraining?
may we be retraining?
may you be retraining?
may they be retraining? 	may I have retrained?
may you have retrained?
may he have retrained?
may we have retrained?
may you have retrained?
may they have retrained? 	may I have been retraining?
may you have been retraining?
may he have been retraining?
may we have been retraining?
may you have been retraining?
may they have been retraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I retrain?
mayn't you retrain?
mayn't he retrain?
mayn't we retrain?
mayn't you retrain?
mayn't they retrain? 	mayn't I be retraining?
mayn't you be retraining?
mayn't he be retraining?
mayn't we be retraining?
mayn't you be retraining?
mayn't they be retraining? 	mayn't I have retrained?
mayn't you have retrained?
mayn't he have retrained?
mayn't we have retrained?
mayn't you have retrained?
mayn't they have retrained? 	mayn't I have been retraining?
mayn't you have been retraining?
mayn't he have been retraining?
mayn't we have been retraining?
mayn't you have been retraining?
mayn't they have been retraining?