could interfere
Verbo regular: interfere - interfered- interfered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could interfere
you could interfere
he could interfere
we could interfere
you could interfere
they could interfere 	I could be interfering
you could be interfering
he could be interfering
we could be interfering
you could be interfering
they could be interfering	I could have interfered
you could have interfered
he could have interfered
we could have interfered
you could have interfered
they could have interfered	I could have been interfering
you could have been interfering
he could have been interfering
we could have been interfering
you could have been interfering
they could have been interfering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not interfere
you could not interfere
he could not interfere
we could not interfere
you could not interfere
they could not interfere 	I could not be interfering
you could not be interfering
he could not be interfering
we could not be interfering
you could not be interfering
they could not be interfering	I could not have interfered
you could not have interfered
he could not have interfered
we could not have interfered
you could not have interfered
they could not have interfered	I could not have been interfering
you could not have been interfering
he could not have been interfering
we could not have been interfering
you could not have been interfering
they could not have been interfering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I interfere?
could you interfere?
could he interfere?
could we interfere?
could you interfere?
could they interfere? 	could I be interfering?
could you be interfering?
could he be interfering?
could we be interfering?
could you be interfering?
could they be interfering? 	could I have interfered?
could you have interfered?
could he have interfered?
could we have interfered?
could you have interfered?
could they have interfered? 	could I have been interfering?
could you have been interfering?
could he have been interfering?
could we have been interfering?
could you have been interfering?
could they have been interfering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not interfere?
could you not interfere?
could he not interfere?
could we not interfere?
could you not interfere?
could they not interfere? 	could I not be interfering?
could you not be interfering?
could he not be interfering?
could we not be interfering?
could you not be interfering?
could they not be interfering? 	could I not have interfered?
could you not have interfered?
could he not have interfered?
could we not have interfered?
could you not have interfered?
could they not have interfered? 	could I not have been interfering?
could you not have been interfering?
could he not have been interfering?
could we not have been interfering?
could you not have been interfering?
could they not have been interfering?