English verb conjugation
COULD SCOFF

Regular verb: scoff - scoffed - scoffed

Affirmation

Simple form	V-ing form
I could scoff you could scoff he could scoff we could scoff you could scoff they could scoff	I could be scoffing you could be scoffing he could be scoffing we could be scoffing you could be scoffing they could be scoffing
Perfect	V-ing perfect
I could have scoffed you could have scoffed he could have scoffed we could have scoffed you could have scoffed they could have scoffed	I could have been scoffing you could have been scoffing he could have been scoffing we could have been scoffing you could have been scoffing they could have been scoffing

Negation

Simple form	V-ing form
I couldn't scoff you couldn't scoff he couldn't scoff we couldn't scoff you couldn't scoff they couldn't scoff	I couldn't be scoffing you couldn't be scoffing he couldn't be scoffing we couldn't be scoffing you couldn't be scoffing they couldn't be scoffing
Perfect	V-ing perfect
I couldn't have scoffed you couldn't have scoffed he couldn't have scoffed we couldn't have scoffed you couldn't have scoffed they couldn't have scoffed	I couldn't have been scoffing you couldn't have been scoffing he couldn't have been scoffing we couldn't have been scoffing you couldn't have been scoffing they couldn't have been scoffing

Interrogative form

Simple form	V-ing form
could I scoff? could you scoff? could he scoff? could we scoff? could you scoff? could they scoff?	could I be scoffing? could you be scoffing? could he be scoffing? could we be scoffing? could you be scoffing? could they be scoffing?
Perfect	V-ing perfect
could I have scoffed? could you have scoffed? could he have scoffed? could we have scoffed? could you have scoffed? could they have scoffed?	could I have been scoffing? could you have been scoffing? could he have been scoffing? could we have been scoffing? could you have been scoffing? could they have been scoffing?

Interro-negative form

Simple form	V-ing form
couldn't I scoff? couldn't you scoff? couldn't he scoff? couldn't we scoff? couldn't you scoff? couldn't they scoff?	couldn't I be scoffing? couldn't you be scoffing? couldn't he be scoffing? couldn't we be scoffing? couldn't you be scoffing? couldn't they be scoffing?
Perfect	V-ing perfect
couldn't I have scoffed? couldn't you have scoffed? couldn't he have scoffed? couldn't we have scoffed? couldn't you have scoffed? couldn't they have scoffed?	couldn't I have been scoffing? couldn't you have been scoffing? couldn't he have been scoffing? couldn't we have been scoffing? couldn't you have been scoffing? couldn't they have been scoffing?