could rifle
Regular verb: rifle - rifled- rifled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rifle
you could rifle
he could rifle
we could rifle
you could rifle
they could rifle 	I could be rifling
you could be rifling
he could be rifling
we could be rifling
you could be rifling
they could be rifling	I could have rifled
you could have rifled
he could have rifled
we could have rifled
you could have rifled
they could have rifled	I could have been rifling
you could have been rifling
he could have been rifling
we could have been rifling
you could have been rifling
they could have been rifling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not rifle
you could not rifle
he could not rifle
we could not rifle
you could not rifle
they could not rifle 	I could not be rifling
you could not be rifling
he could not be rifling
we could not be rifling
you could not be rifling
they could not be rifling	I could not have rifled
you could not have rifled
he could not have rifled
we could not have rifled
you could not have rifled
they could not have rifled	I could not have been rifling
you could not have been rifling
he could not have been rifling
we could not have been rifling
you could not have been rifling
they could not have been rifling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rifle?
could you rifle?
could he rifle?
could we rifle?
could you rifle?
could they rifle? 	could I be rifling?
could you be rifling?
could he be rifling?
could we be rifling?
could you be rifling?
could they be rifling? 	could I have rifled?
could you have rifled?
could he have rifled?
could we have rifled?
could you have rifled?
could they have rifled? 	could I have been rifling?
could you have been rifling?
could he have been rifling?
could we have been rifling?
could you have been rifling?
could they have been rifling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not rifle?
could you not rifle?
could he not rifle?
could we not rifle?
could you not rifle?
could they not rifle? 	could I not be rifling?
could you not be rifling?
could he not be rifling?
could we not be rifling?
could you not be rifling?
could they not be rifling? 	could I not have rifled?
could you not have rifled?
could he not have rifled?
could we not have rifled?
could you not have rifled?
could they not have rifled? 	could I not have been rifling?
could you not have been rifling?
could he not have been rifling?
could we not have been rifling?
could you not have been rifling?
could they not have been rifling?