could interfere
Verbo regular: interfere - interfered- interfered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could interfere
you could interfere
she could interfere
we could interfere
you could interfere
they could interfere 	I could be interfering
you could be interfering
she could be interfering
we could be interfering
you could be interfering
they could be interfering	I could have interfered
you could have interfered
she 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
she could have been interfering
we could have been interfering
you could have been interfering
they could have been interfering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't interfere
you couldn't interfere
she couldn't interfere
we couldn't interfere
you couldn't interfere
they couldn't interfere 	I couldn't be interfering
you couldn't be interfering
she couldn't be interfering
we couldn't be interfering
you couldn't be interfering
they couldn't be interfering	I couldn't have interfered
you couldn't have interfered
she couldn't have interfered
we couldn't have interfered
you couldn't have interfered
they couldn't have interfered	I couldn't have been interfering
you couldn't have been interfering
she couldn't have been interfering
we couldn't have been interfering
you couldn't have been interfering
they couldn't have been interfering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I interfere?
could you interfere?
could she interfere?
could we interfere?
could you interfere?
could they interfere? 	could I be interfering?
could you be interfering?
could she be interfering?
could we be interfering?
could you be interfering?
could they be interfering? 	could I have interfered?
could you have interfered?
could she 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 she have been interfering?
could we have been interfering?
could you have been interfering?
could they have been interfering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I interfere?
couldn't you interfere?
couldn't she interfere?
couldn't we interfere?
couldn't you interfere?
couldn't they interfere? 	couldn't I be interfering?
couldn't you be interfering?
couldn't she be interfering?
couldn't we be interfering?
couldn't you be interfering?
couldn't they be interfering? 	couldn't I have interfered?
couldn't you have interfered?
couldn't she have interfered?
couldn't we have interfered?
couldn't you have interfered?
couldn't they have interfered? 	couldn't I have been interfering?
couldn't you have been interfering?
couldn't she have been interfering?
couldn't we have been interfering?
couldn't you have been interfering?
couldn't they have been interfering?