English verb conjugation
COULD PLUNK

Regular verb: plunk - plunked - plunked

Affirmation

Simple form	V-ing form
I could plunk you could plunk she could plunk we could plunk you could plunk they could plunk	I could be plunking you could be plunking she could be plunking we could be plunking you could be plunking they could be plunking
Perfect	V-ing perfect
I could have plunked you could have plunked she could have plunked we could have plunked you could have plunked they could have plunked	I could have been plunking you could have been plunking she could have been plunking we could have been plunking you could have been plunking they could have been plunking

Negation

Simple form	V-ing form
I couldn't plunk you couldn't plunk she couldn't plunk we couldn't plunk you couldn't plunk they couldn't plunk	I couldn't be plunking you couldn't be plunking she couldn't be plunking we couldn't be plunking you couldn't be plunking they couldn't be plunking
Perfect	V-ing perfect
I couldn't have plunked you couldn't have plunked she couldn't have plunked we couldn't have plunked you couldn't have plunked they couldn't have plunked	I couldn't have been plunking you couldn't have been plunking she couldn't have been plunking we couldn't have been plunking you couldn't have been plunking they couldn't have been plunking

Interrogative form

Simple form	V-ing form
could I plunk? could you plunk? could she plunk? could we plunk? could you plunk? could they plunk?	could I be plunking? could you be plunking? could she be plunking? could we be plunking? could you be plunking? could they be plunking?
Perfect	V-ing perfect
could I have plunked? could you have plunked? could she have plunked? could we have plunked? could you have plunked? could they have plunked?	could I have been plunking? could you have been plunking? could she have been plunking? could we have been plunking? could you have been plunking? could they have been plunking?

Interro-negative form

Simple form	V-ing form
couldn't I plunk? couldn't you plunk? couldn't she plunk? couldn't we plunk? couldn't you plunk? couldn't they plunk?	couldn't I be plunking? couldn't you be plunking? couldn't she be plunking? couldn't we be plunking? couldn't you be plunking? couldn't they be plunking?
Perfect	V-ing perfect
couldn't I have plunked? couldn't you have plunked? couldn't she have plunked? couldn't we have plunked? couldn't you have plunked? couldn't they have plunked?	couldn't I have been plunking? couldn't you have been plunking? couldn't she have been plunking? couldn't we have been plunking? couldn't you have been plunking? couldn't they have been plunking?