English verb conjugation
COULD LAUGH

Regular verb: laugh - laughed - laughed

Affirmation

Simple form	V-ing form
I could laugh you could laugh she could laugh we could laugh you could laugh they could laugh	I could be laughing you could be laughing she could be laughing we could be laughing you could be laughing they could be laughing
Perfect	V-ing perfect
I could have laughed you could have laughed she could have laughed we could have laughed you could have laughed they could have laughed	I could have been laughing you could have been laughing she could have been laughing we could have been laughing you could have been laughing they could have been laughing

Negation

Simple form	V-ing form
I could not laugh you could not laugh she could not laugh we could not laugh you could not laugh they could not laugh	I could not be laughing you could not be laughing she could not be laughing we could not be laughing you could not be laughing they could not be laughing
Perfect	V-ing perfect
I could not have laughed you could not have laughed she could not have laughed we could not have laughed you could not have laughed they could not have laughed	I could not have been laughing you could not have been laughing she could not have been laughing we could not have been laughing you could not have been laughing they could not have been laughing

Interrogative form

Simple form	V-ing form
could I laugh? could you laugh? could she laugh? could we laugh? could you laugh? could they laugh?	could I be laughing? could you be laughing? could she be laughing? could we be laughing? could you be laughing? could they be laughing?
Perfect	V-ing perfect
could I have laughed? could you have laughed? could she have laughed? could we have laughed? could you have laughed? could they have laughed?	could I have been laughing? could you have been laughing? could she have been laughing? could we have been laughing? could you have been laughing? could they have been laughing?

Interro-negative form

Simple form	V-ing form
could I not laugh? could you not laugh? could she not laugh? could we not laugh? could you not laugh? could they not laugh?	could I not be laughing? could you not be laughing? could she not be laughing? could we not be laughing? could you not be laughing? could they not be laughing?
Perfect	V-ing perfect
could I not have laughed? could you not have laughed? could she not have laughed? could we not have laughed? could you not have laughed? could they not have laughed?	could I not have been laughing? could you not have been laughing? could she not have been laughing? could we not have been laughing? could you not have been laughing? could they not have been laughing?