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 can't interfere
you can't interfere
she can't interfere
we can't interfere
you can't interfere
they can't interfere 	I can't be interfering
you can't be interfering
she can't be interfering
we can't be interfering
you can't be interfering
they can't be interfering	I can't have interfered
you can't have interfered
she can't have interfered
we can't have interfered
you can't have interfered
they can't have interfered	I can't have been interfering
you can't have been interfering
she can't have been interfering
we can't have been interfering
you can't have been interfering
they can't 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't I interfere?
can't you interfere?
can't she interfere?
can't we interfere?
can't you interfere?
can't they interfere? 	can't I be interfering?
can't you be interfering?
can't she be interfering?
can't we be interfering?
can't you be interfering?
can't they be interfering? 	can't I have interfered?
can't you have interfered?
can't she have interfered?
can't we have interfered?
can't you have interfered?
can't they have interfered? 	can't I have been interfering?
can't you have been interfering?
can't she have been interfering?
can't we have been interfering?
can't you have been interfering?
can't they have been interfering?