English verb conjugation
COULD CLONK

Regular verb: clonk - clonked - clonked

Affirmation

Simple form	V-ing form
I could clonk you could clonk he could clonk we could clonk you could clonk they could clonk	I could be clonking you could be clonking he could be clonking we could be clonking you could be clonking they could be clonking
Perfect	V-ing perfect
I could have clonked you could have clonked he could have clonked we could have clonked you could have clonked they could have clonked	I could have been clonking you could have been clonking he could have been clonking we could have been clonking you could have been clonking they could have been clonking

Negation

Simple form	V-ing form
I could not clonk you could not clonk he could not clonk we could not clonk you could not clonk they could not clonk	I could not be clonking you could not be clonking he could not be clonking we could not be clonking you could not be clonking they could not be clonking
Perfect	V-ing perfect
I could not have clonked you could not have clonked he could not have clonked we could not have clonked you could not have clonked they could not have clonked	I could not have been clonking you could not have been clonking he could not have been clonking we could not have been clonking you could not have been clonking they could not have been clonking

Interrogative form

Simple form	V-ing form
could I clonk? could you clonk? could he clonk? could we clonk? could you clonk? could they clonk?	could I be clonking? could you be clonking? could he be clonking? could we be clonking? could you be clonking? could they be clonking?
Perfect	V-ing perfect
could I have clonked? could you have clonked? could he have clonked? could we have clonked? could you have clonked? could they have clonked?	could I have been clonking? could you have been clonking? could he have been clonking? could we have been clonking? could you have been clonking? could they have been clonking?

Interro-negative form

Simple form	V-ing form
could I not clonk? could you not clonk? could he not clonk? could we not clonk? could you not clonk? could they not clonk?	could I not be clonking? could you not be clonking? could he not be clonking? could we not be clonking? could you not be clonking? could they not be clonking?
Perfect	V-ing perfect
could I not have clonked? could you not have clonked? could he not have clonked? could we not have clonked? could you not have clonked? could they not have clonked?	could I not have been clonking? could you not have been clonking? could he not have been clonking? could we not have been clonking? could you not have been clonking? could they not have been clonking?