can interfere
Regular verb: interfere - interfered- interfered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can interfere
you can interfere
she can interfere
we can interfere
you can interfere
they can interfere 	I can be interfering
you can be interfering
she can be interfering
we can be interfering
you can be interfering
they can be interfering	I can have interfered
you can have interfered
she can have interfered
we can have interfered
you can have interfered
they can have interfered	I can have been interfering
you can have been interfering
she can have been interfering
we can have been interfering
you can have been interfering
they can have been interfering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot interfere
you cannot interfere
she cannot interfere
we cannot interfere
you cannot interfere
they cannot interfere 	I cannot be interfering
you cannot be interfering
she cannot be interfering
we cannot be interfering
you cannot be interfering
they cannot be interfering	I cannot have interfered
you cannot have interfered
she cannot have interfered
we cannot have interfered
you cannot have interfered
they cannot have interfered	I cannot have been interfering
you cannot have been interfering
she cannot have been interfering
we cannot have been interfering
you cannot have been interfering
they cannot have been interfering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I interfere?
can you interfere?
can she interfere?
can we interfere?
can you interfere?
can they interfere? 	can I be interfering?
can you be interfering?
can she be interfering?
can we be interfering?
can you be interfering?
can they be interfering? 	can I have interfered?
can you have interfered?
can she have interfered?
can we have interfered?
can you have interfered?
can they have interfered? 	can I have been interfering?
can you have been interfering?
can she have been interfering?
can we have been interfering?
can you have been interfering?
can they have been interfering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not interfere?
can you not interfere?
can she not interfere?
can we not interfere?
can you not interfere?
can they not interfere? 	can I not be interfering?
can you not be interfering?
can she not be interfering?
can we not be interfering?
can you not be interfering?
can they not be interfering? 	can I not have interfered?
can you not have interfered?
can she not have interfered?
can we not have interfered?
can you not have interfered?
can they not have interfered? 	can I not have been interfering?
can you not have been interfering?
can she not have been interfering?
can we not have been interfering?
can you not have been interfering?
can they not have been interfering?