English verb conjugation
COULD LISP

Regular verb: lisp - lisped - lisped

Affirmation

Simple form	V-ing form
I could lisp you could lisp he could lisp we could lisp you could lisp they could lisp	I could be lisping you could be lisping he could be lisping we could be lisping you could be lisping they could be lisping
Perfect	V-ing perfect
I could have lisped you could have lisped he could have lisped we could have lisped you could have lisped they could have lisped	I could have been lisping you could have been lisping he could have been lisping we could have been lisping you could have been lisping they could have been lisping

Negation

Simple form	V-ing form
I could not lisp you could not lisp he could not lisp we could not lisp you could not lisp they could not lisp	I could not be lisping you could not be lisping he could not be lisping we could not be lisping you could not be lisping they could not be lisping
Perfect	V-ing perfect
I could not have lisped you could not have lisped he could not have lisped we could not have lisped you could not have lisped they could not have lisped	I could not have been lisping you could not have been lisping he could not have been lisping we could not have been lisping you could not have been lisping they could not have been lisping

Interrogative form

Simple form	V-ing form
could I lisp? could you lisp? could he lisp? could we lisp? could you lisp? could they lisp?	could I be lisping? could you be lisping? could he be lisping? could we be lisping? could you be lisping? could they be lisping?
Perfect	V-ing perfect
could I have lisped? could you have lisped? could he have lisped? could we have lisped? could you have lisped? could they have lisped?	could I have been lisping? could you have been lisping? could he have been lisping? could we have been lisping? could you have been lisping? could they have been lisping?

Interro-negative form

Simple form	V-ing form
could I not lisp? could you not lisp? could he not lisp? could we not lisp? could you not lisp? could they not lisp?	could I not be lisping? could you not be lisping? could he not be lisping? could we not be lisping? could you not be lisping? could they not be lisping?
Perfect	V-ing perfect
could I not have lisped? could you not have lisped? could he not have lisped? could we not have lisped? could you not have lisped? could they not have lisped?	could I not have been lisping? could you not have been lisping? could he not have been lisping? could we not have been lisping? could you not have been lisping? could they not have been lisping?