should retrain
Regular verb: retrain - retrained- retrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd retrain
you'd retrain
he'd retrain
we'd retrain
you'd retrain
they'd retrain 	I'd be retraining
you'd be retraining
he'd be retraining
we'd be retraining
you'd be retraining
they'd be retraining	I should've retrained
you should've retrained
he should've retrained
we should've retrained
you should've retrained
they should've retrained	I should've been retraining
you should've been retraining
he should've been retraining
we should've been retraining
you should've been retraining
they should've been retraining	

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

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

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