English verb conjugation
COULD LISP

Regular verb: lisp - lisped - lisped

Affirmation

Simple form	V-ing form
I could lisp you could lisp she could lisp we could lisp you could lisp they could lisp	I could be lisping you could be lisping she 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 she 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 she 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 couldn't lisp you couldn't lisp she couldn't lisp we couldn't lisp you couldn't lisp they couldn't lisp	I couldn't be lisping you couldn't be lisping she couldn't be lisping we couldn't be lisping you couldn't be lisping they couldn't be lisping
Perfect	V-ing perfect
I couldn't have lisped you couldn't have lisped she couldn't have lisped we couldn't have lisped you couldn't have lisped they couldn't have lisped	I couldn't have been lisping you couldn't have been lisping she couldn't have been lisping we couldn't have been lisping you couldn't have been lisping they couldn't have been lisping

Interrogative form

Simple form	V-ing form
could I lisp? could you lisp? could she lisp? could we lisp? could you lisp? could they lisp?	could I be lisping? could you be lisping? could she 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 she 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 she 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
couldn't I lisp? couldn't you lisp? couldn't she lisp? couldn't we lisp? couldn't you lisp? couldn't they lisp?	couldn't I be lisping? couldn't you be lisping? couldn't she be lisping? couldn't we be lisping? couldn't you be lisping? couldn't they be lisping?
Perfect	V-ing perfect
couldn't I have lisped? couldn't you have lisped? couldn't she have lisped? couldn't we have lisped? couldn't you have lisped? couldn't they have lisped?	couldn't I have been lisping? couldn't you have been lisping? couldn't she have been lisping? couldn't we have been lisping? couldn't you have been lisping? couldn't they have been lisping?