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 cannot retrain
you cannot retrain
he cannot retrain
we cannot retrain
you cannot retrain
they cannot retrain 	I cannot be retraining
you cannot be retraining
he cannot be retraining
we cannot be retraining
you cannot be retraining
they cannot be retraining	I cannot have retrained
you cannot have retrained
he cannot have retrained
we cannot have retrained
you cannot have retrained
they cannot have retrained	I cannot have been retraining
you cannot have been retraining
he cannot have been retraining
we cannot have been retraining
you cannot have been retraining
they cannot 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 I not retrain?
can you not retrain?
can he not retrain?
can we not retrain?
can you not retrain?
can they not retrain? 	can I not be retraining?
can you not be retraining?
can he not be retraining?
can we not be retraining?
can you not be retraining?
can they not be retraining? 	can I not have retrained?
can you not have retrained?
can he not have retrained?
can we not have retrained?
can you not have retrained?
can they not have retrained? 	can I not have been retraining?
can you not have been retraining?
can he not have been retraining?
can we not have been retraining?
can you not have been retraining?
can they not have been retraining?