English verb conjugation
CAN GUFFAW

Regular verb: guffaw - guffawed - guffawed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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