English verb conjugation
COULD RIFLE

Regular verb: rifle - rifled - rifled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?