English verb conjugation
COULD GUFFAW

Regular verb: guffaw - guffawed - guffawed

Affirmation

Simple form	V-ing form
I could guffaw you could guffaw he could guffaw we could guffaw you could guffaw they could guffaw	I could be guffawing you could be guffawing he could be guffawing we could be guffawing you could be guffawing they could be guffawing
Perfect	V-ing perfect
I could have guffawed you could have guffawed he could have guffawed we could have guffawed you could have guffawed they could have guffawed	I could have been guffawing you could have been guffawing he could have been guffawing we could have been guffawing you could have been guffawing they could have been guffawing

Negation

Simple form	V-ing form
I could not guffaw you could not guffaw he could not guffaw we could not guffaw you could not guffaw they could not guffaw	I could not be guffawing you could not be guffawing he could not be guffawing we could not be guffawing you could not be guffawing they could not be guffawing
Perfect	V-ing perfect
I could not have guffawed you could not have guffawed he could not have guffawed we could not have guffawed you could not have guffawed they could not have guffawed	I could not have been guffawing you could not have been guffawing he could not have been guffawing we could not have been guffawing you could not have been guffawing they could not have been guffawing

Interrogative form

Simple form	V-ing form
could I guffaw? could you guffaw? could he guffaw? could we guffaw? could you guffaw? could they guffaw?	could I be guffawing? could you be guffawing? could he be guffawing? could we be guffawing? could you be guffawing? could they be guffawing?
Perfect	V-ing perfect
could I have guffawed? could you have guffawed? could he have guffawed? could we have guffawed? could you have guffawed? could they have guffawed?	could I have been guffawing? could you have been guffawing? could he have been guffawing? could we have been guffawing? could you have been guffawing? could they have been guffawing?

Interro-negative form

Simple form	V-ing form
could I not guffaw? could you not guffaw? could he not guffaw? could we not guffaw? could you not guffaw? could they not guffaw?	could I not be guffawing? could you not be guffawing? could he not be guffawing? could we not be guffawing? could you not be guffawing? could they not be guffawing?
Perfect	V-ing perfect
could I not have guffawed? could you not have guffawed? could he not have guffawed? could we not have guffawed? could you not have guffawed? could they not have guffawed?	could I not have been guffawing? could you not have been guffawing? could he not have been guffawing? could we not have been guffawing? could you not have been guffawing? could they not have been guffawing?