could rifle
Regular verb: rifle - rifled- rifled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rifle
you could rifle
she could rifle
we could rifle
you could rifle
they could rifle 	I could be rifling
you could be rifling
she could be rifling
we could be rifling
you could be rifling
they could be rifling	I could have rifled
you could have rifled
she 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
she 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 couldn't rifle
you couldn't rifle
she couldn't rifle
we couldn't rifle
you couldn't rifle
they couldn't rifle 	I couldn't be rifling
you couldn't be rifling
she couldn't be rifling
we couldn't be rifling
you couldn't be rifling
they couldn't be rifling	I couldn't have rifled
you couldn't have rifled
she couldn't have rifled
we couldn't have rifled
you couldn't have rifled
they couldn't have rifled	I couldn't have been rifling
you couldn't have been rifling
she couldn't have been rifling
we couldn't have been rifling
you couldn't have been rifling
they couldn't have been rifling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rifle?
could you rifle?
could she rifle?
could we rifle?
could you rifle?
could they rifle? 	could I be rifling?
could you be rifling?
could she be rifling?
could we be rifling?
could you be rifling?
could they be rifling? 	could I have rifled?
could you have rifled?
could she 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 she 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 	
couldn't I rifle?
couldn't you rifle?
couldn't she rifle?
couldn't we rifle?
couldn't you rifle?
couldn't they rifle? 	couldn't I be rifling?
couldn't you be rifling?
couldn't she be rifling?
couldn't we be rifling?
couldn't you be rifling?
couldn't they be rifling? 	couldn't I have rifled?
couldn't you have rifled?
couldn't she have rifled?
couldn't we have rifled?
couldn't you have rifled?
couldn't they have rifled? 	couldn't I have been rifling?
couldn't you have been rifling?
couldn't she have been rifling?
couldn't we have been rifling?
couldn't you have been rifling?
couldn't they have been rifling?