could introduce
Verbo regular: introduce - introduced- introduced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could introduce
you could introduce
he could introduce
we could introduce
you could introduce
they could introduce 	I could be introducing
you could be introducing
he could be introducing
we could be introducing
you could be introducing
they could be introducing	I could have introduced
you could have introduced
he could have introduced
we could have introduced
you could have introduced
they could have introduced	I could have been introducing
you could have been introducing
he could have been introducing
we could have been introducing
you could have been introducing
they could have been introducing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not introduce
you could not introduce
he could not introduce
we could not introduce
you could not introduce
they could not introduce 	I could not be introducing
you could not be introducing
he could not be introducing
we could not be introducing
you could not be introducing
they could not be introducing	I could not have introduced
you could not have introduced
he could not have introduced
we could not have introduced
you could not have introduced
they could not have introduced	I could not have been introducing
you could not have been introducing
he could not have been introducing
we could not have been introducing
you could not have been introducing
they could not have been introducing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I introduce?
could you introduce?
could he introduce?
could we introduce?
could you introduce?
could they introduce? 	could I be introducing?
could you be introducing?
could he be introducing?
could we be introducing?
could you be introducing?
could they be introducing? 	could I have introduced?
could you have introduced?
could he have introduced?
could we have introduced?
could you have introduced?
could they have introduced? 	could I have been introducing?
could you have been introducing?
could he have been introducing?
could we have been introducing?
could you have been introducing?
could they have been introducing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not introduce?
could you not introduce?
could he not introduce?
could we not introduce?
could you not introduce?
could they not introduce? 	could I not be introducing?
could you not be introducing?
could he not be introducing?
could we not be introducing?
could you not be introducing?
could they not be introducing? 	could I not have introduced?
could you not have introduced?
could he not have introduced?
could we not have introduced?
could you not have introduced?
could they not have introduced? 	could I not have been introducing?
could you not have been introducing?
could he not have been introducing?
could we not have been introducing?
could you not have been introducing?
could they not have been introducing?