could introduce
Verbo regular: introduce - introduced- introduced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't introduce
you couldn't introduce
he couldn't introduce
we couldn't introduce
you couldn't introduce
they couldn't introduce 	I couldn't be introducing
you couldn't be introducing
he couldn't be introducing
we couldn't be introducing
you couldn't be introducing
they couldn't be introducing	I couldn't have introduced
you couldn't have introduced
he couldn't have introduced
we couldn't have introduced
you couldn't have introduced
they couldn't have introduced	I couldn't have been introducing
you couldn't have been introducing
he couldn't have been introducing
we couldn't have been introducing
you couldn't have been introducing
they couldn't have been introducing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I introduce?
couldn't you introduce?
couldn't he introduce?
couldn't we introduce?
couldn't you introduce?
couldn't they introduce? 	couldn't I be introducing?
couldn't you be introducing?
couldn't he be introducing?
couldn't we be introducing?
couldn't you be introducing?
couldn't they be introducing? 	couldn't I have introduced?
couldn't you have introduced?
couldn't he have introduced?
couldn't we have introduced?
couldn't you have introduced?
couldn't they have introduced? 	couldn't I have been introducing?
couldn't you have been introducing?
couldn't he have been introducing?
couldn't we have been introducing?
couldn't you have been introducing?
couldn't they have been introducing?