English verb conjugation
COULD LURK

Regular verb: lurk - lurked - lurked

Affirmation

Simple form	V-ing form
I could lurk you could lurk he could lurk we could lurk you could lurk they could lurk	I could be lurking you could be lurking he could be lurking we could be lurking you could be lurking they could be lurking
Perfect	V-ing perfect
I could have lurked you could have lurked he could have lurked we could have lurked you could have lurked they could have lurked	I could have been lurking you could have been lurking he could have been lurking we could have been lurking you could have been lurking they could have been lurking

Negation

Simple form	V-ing form
I couldn't lurk you couldn't lurk he couldn't lurk we couldn't lurk you couldn't lurk they couldn't lurk	I couldn't be lurking you couldn't be lurking he couldn't be lurking we couldn't be lurking you couldn't be lurking they couldn't be lurking
Perfect	V-ing perfect
I couldn't have lurked you couldn't have lurked he couldn't have lurked we couldn't have lurked you couldn't have lurked they couldn't have lurked	I couldn't have been lurking you couldn't have been lurking he couldn't have been lurking we couldn't have been lurking you couldn't have been lurking they couldn't have been lurking

Interrogative form

Simple form	V-ing form
could I lurk? could you lurk? could he lurk? could we lurk? could you lurk? could they lurk?	could I be lurking? could you be lurking? could he be lurking? could we be lurking? could you be lurking? could they be lurking?
Perfect	V-ing perfect
could I have lurked? could you have lurked? could he have lurked? could we have lurked? could you have lurked? could they have lurked?	could I have been lurking? could you have been lurking? could he have been lurking? could we have been lurking? could you have been lurking? could they have been lurking?

Interro-negative form

Simple form	V-ing form
couldn't I lurk? couldn't you lurk? couldn't he lurk? couldn't we lurk? couldn't you lurk? couldn't they lurk?	couldn't I be lurking? couldn't you be lurking? couldn't he be lurking? couldn't we be lurking? couldn't you be lurking? couldn't they be lurking?
Perfect	V-ing perfect
couldn't I have lurked? couldn't you have lurked? couldn't he have lurked? couldn't we have lurked? couldn't you have lurked? couldn't they have lurked?	couldn't I have been lurking? couldn't you have been lurking? couldn't he have been lurking? couldn't we have been lurking? couldn't you have been lurking? couldn't they have been lurking?