could detrain
Regular verb: detrain - detrained- detrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could detrain
you could detrain
she could detrain
we could detrain
you could detrain
they could detrain 	I could be detraining
you could be detraining
she could be detraining
we could be detraining
you could be detraining
they could be detraining	I could have detrained
you could have detrained
she could have detrained
we could have detrained
you could have detrained
they could have detrained	I could have been detraining
you could have been detraining
she could have been detraining
we could have been detraining
you could have been detraining
they could have been detraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't detrain
you couldn't detrain
she couldn't detrain
we couldn't detrain
you couldn't detrain
they couldn't detrain 	I couldn't be detraining
you couldn't be detraining
she couldn't be detraining
we couldn't be detraining
you couldn't be detraining
they couldn't be detraining	I couldn't have detrained
you couldn't have detrained
she couldn't have detrained
we couldn't have detrained
you couldn't have detrained
they couldn't have detrained	I couldn't have been detraining
you couldn't have been detraining
she couldn't have been detraining
we couldn't have been detraining
you couldn't have been detraining
they couldn't have been detraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I detrain?
could you detrain?
could she detrain?
could we detrain?
could you detrain?
could they detrain? 	could I be detraining?
could you be detraining?
could she be detraining?
could we be detraining?
could you be detraining?
could they be detraining? 	could I have detrained?
could you have detrained?
could she have detrained?
could we have detrained?
could you have detrained?
could they have detrained? 	could I have been detraining?
could you have been detraining?
could she have been detraining?
could we have been detraining?
could you have been detraining?
could they have been detraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I detrain?
couldn't you detrain?
couldn't she detrain?
couldn't we detrain?
couldn't you detrain?
couldn't they detrain? 	couldn't I be detraining?
couldn't you be detraining?
couldn't she be detraining?
couldn't we be detraining?
couldn't you be detraining?
couldn't they be detraining? 	couldn't I have detrained?
couldn't you have detrained?
couldn't she have detrained?
couldn't we have detrained?
couldn't you have detrained?
couldn't they have detrained? 	couldn't I have been detraining?
couldn't you have been detraining?
couldn't she have been detraining?
couldn't we have been detraining?
couldn't you have been detraining?
couldn't they have been detraining?