can expound
Verbo regular: expound - expounded- expounded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can expound
you can expound
he can expound
we can expound
you can expound
they can expound 	I can be expounding
you can be expounding
he can be expounding
we can be expounding
you can be expounding
they can be expounding	I can have expounded
you can have expounded
he can have expounded
we can have expounded
you can have expounded
they can have expounded	I can have been expounding
you can have been expounding
he can have been expounding
we can have been expounding
you can have been expounding
they can have been expounding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot expound
you cannot expound
he cannot expound
we cannot expound
you cannot expound
they cannot expound 	I cannot be expounding
you cannot be expounding
he cannot be expounding
we cannot be expounding
you cannot be expounding
they cannot be expounding	I cannot have expounded
you cannot have expounded
he cannot have expounded
we cannot have expounded
you cannot have expounded
they cannot have expounded	I cannot have been expounding
you cannot have been expounding
he cannot have been expounding
we cannot have been expounding
you cannot have been expounding
they cannot have been expounding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I expound?
can you expound?
can he expound?
can we expound?
can you expound?
can they expound? 	can I be expounding?
can you be expounding?
can he be expounding?
can we be expounding?
can you be expounding?
can they be expounding? 	can I have expounded?
can you have expounded?
can he have expounded?
can we have expounded?
can you have expounded?
can they have expounded? 	can I have been expounding?
can you have been expounding?
can he have been expounding?
can we have been expounding?
can you have been expounding?
can they have been expounding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not expound?
can you not expound?
can he not expound?
can we not expound?
can you not expound?
can they not expound? 	can I not be expounding?
can you not be expounding?
can he not be expounding?
can we not be expounding?
can you not be expounding?
can they not be expounding? 	can I not have expounded?
can you not have expounded?
can he not have expounded?
can we not have expounded?
can you not have expounded?
can they not have expounded? 	can I not have been expounding?
can you not have been expounding?
can he not have been expounding?
can we not have been expounding?
can you not have been expounding?
can they not have been expounding?