English verb conjugation
MUST SCOFF

Regular verb: scoff - scoffed - scoffed

Affirmation

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

Negation

Simple form	V-ing form
I must not scoff you must not scoff he must not scoff we must not scoff you must not scoff they must not scoff	I must not be scoffing you must not be scoffing he must not be scoffing we must not be scoffing you must not be scoffing they must not be scoffing
Perfect	V-ing perfect
I must not have scoffed you must not have scoffed he must not have scoffed we must not have scoffed you must not have scoffed they must not have scoffed	I must not have been scoffing you must not have been scoffing he must not have been scoffing we must not have been scoffing you must not have been scoffing they must not have been scoffing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
must I not scoff? must you not scoff? must he not scoff? must we not scoff? must you not scoff? must they not scoff?	must I not be scoffing? must you not be scoffing? must he not be scoffing? must we not be scoffing? must you not be scoffing? must they not be scoffing?
Perfect	V-ing perfect
must I not have scoffed? must you not have scoffed? must he not have scoffed? must we not have scoffed? must you not have scoffed? must they not have scoffed?	must I not have been scoffing? must you not have been scoffing? must he not have been scoffing? must we not have been scoffing? must you not have been scoffing? must they not have been scoffing?