English verb conjugation
COULD CLUNK

Regular verb: clunk - clunked - clunked

Affirmation

Simple form	V-ing form
I could clunk you could clunk he could clunk we could clunk you could clunk they could clunk	I could be clunking you could be clunking he could be clunking we could be clunking you could be clunking they could be clunking
Perfect	V-ing perfect
I could have clunked you could have clunked he could have clunked we could have clunked you could have clunked they could have clunked	I could have been clunking you could have been clunking he could have been clunking we could have been clunking you could have been clunking they could have been clunking

Negation

Simple form	V-ing form
I could not clunk you could not clunk he could not clunk we could not clunk you could not clunk they could not clunk	I could not be clunking you could not be clunking he could not be clunking we could not be clunking you could not be clunking they could not be clunking
Perfect	V-ing perfect
I could not have clunked you could not have clunked he could not have clunked we could not have clunked you could not have clunked they could not have clunked	I could not have been clunking you could not have been clunking he could not have been clunking we could not have been clunking you could not have been clunking they could not have been clunking

Interrogative form

Simple form	V-ing form
could I clunk? could you clunk? could he clunk? could we clunk? could you clunk? could they clunk?	could I be clunking? could you be clunking? could he be clunking? could we be clunking? could you be clunking? could they be clunking?
Perfect	V-ing perfect
could I have clunked? could you have clunked? could he have clunked? could we have clunked? could you have clunked? could they have clunked?	could I have been clunking? could you have been clunking? could he have been clunking? could we have been clunking? could you have been clunking? could they have been clunking?

Interro-negative form

Simple form	V-ing form
could I not clunk? could you not clunk? could he not clunk? could we not clunk? could you not clunk? could they not clunk?	could I not be clunking? could you not be clunking? could he not be clunking? could we not be clunking? could you not be clunking? could they not be clunking?
Perfect	V-ing perfect
could I not have clunked? could you not have clunked? could he not have clunked? could we not have clunked? could you not have clunked? could they not have clunked?	could I not have been clunking? could you not have been clunking? could he not have been clunking? could we not have been clunking? could you not have been clunking? could they not have been clunking?