can retrain
Regular verb: retrain - retrained- retrained

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

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

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

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