English verb conjugation
COULD CLANK

Regular verb: clank - clanked - clanked

Affirmation

Simple form	V-ing form
I could clank you could clank she could clank we could clank you could clank they could clank	I could be clanking you could be clanking she could be clanking we could be clanking you could be clanking they could be clanking
Perfect	V-ing perfect
I could have clanked you could have clanked she could have clanked we could have clanked you could have clanked they could have clanked	I could have been clanking you could have been clanking she could have been clanking we could have been clanking you could have been clanking they could have been clanking

Negation

Simple form	V-ing form
I could not clank you could not clank she could not clank we could not clank you could not clank they could not clank	I could not be clanking you could not be clanking she could not be clanking we could not be clanking you could not be clanking they could not be clanking
Perfect	V-ing perfect
I could not have clanked you could not have clanked she could not have clanked we could not have clanked you could not have clanked they could not have clanked	I could not have been clanking you could not have been clanking she could not have been clanking we could not have been clanking you could not have been clanking they could not have been clanking

Interrogative form

Simple form	V-ing form
could I clank? could you clank? could she clank? could we clank? could you clank? could they clank?	could I be clanking? could you be clanking? could she be clanking? could we be clanking? could you be clanking? could they be clanking?
Perfect	V-ing perfect
could I have clanked? could you have clanked? could she have clanked? could we have clanked? could you have clanked? could they have clanked?	could I have been clanking? could you have been clanking? could she have been clanking? could we have been clanking? could you have been clanking? could they have been clanking?

Interro-negative form

Simple form	V-ing form
could I not clank? could you not clank? could she not clank? could we not clank? could you not clank? could they not clank?	could I not be clanking? could you not be clanking? could she not be clanking? could we not be clanking? could you not be clanking? could they not be clanking?
Perfect	V-ing perfect
could I not have clanked? could you not have clanked? could she not have clanked? could we not have clanked? could you not have clanked? could they not have clanked?	could I not have been clanking? could you not have been clanking? could she not have been clanking? could we not have been clanking? could you not have been clanking? could they not have been clanking?