can retain
Verbo regular: retain - retained- retained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can retain
you can retain
she can retain
we can retain
you can retain
they can retain 	I can be retaining
you can be retaining
she can be retaining
we can be retaining
you can be retaining
they can be retaining	I can have retained
you can have retained
she can have retained
we can have retained
you can have retained
they can have retained	I can have been retaining
you can have been retaining
she can have been retaining
we can have been retaining
you can have been retaining
they can have been retaining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't retain
you can't retain
she can't retain
we can't retain
you can't retain
they can't retain 	I can't be retaining
you can't be retaining
she can't be retaining
we can't be retaining
you can't be retaining
they can't be retaining	I can't have retained
you can't have retained
she can't have retained
we can't have retained
you can't have retained
they can't have retained	I can't have been retaining
you can't have been retaining
she can't have been retaining
we can't have been retaining
you can't have been retaining
they can't have been retaining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I retain?
can you retain?
can she retain?
can we retain?
can you retain?
can they retain? 	can I be retaining?
can you be retaining?
can she be retaining?
can we be retaining?
can you be retaining?
can they be retaining? 	can I have retained?
can you have retained?
can she have retained?
can we have retained?
can you have retained?
can they have retained? 	can I have been retaining?
can you have been retaining?
can she have been retaining?
can we have been retaining?
can you have been retaining?
can they have been retaining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I retain?
can't you retain?
can't she retain?
can't we retain?
can't you retain?
can't they retain? 	can't I be retaining?
can't you be retaining?
can't she be retaining?
can't we be retaining?
can't you be retaining?
can't they be retaining? 	can't I have retained?
can't you have retained?
can't she have retained?
can't we have retained?
can't you have retained?
can't they have retained? 	can't I have been retaining?
can't you have been retaining?
can't she have been retaining?
can't we have been retaining?
can't you have been retaining?
can't they have been retaining?