Conjugación del verbo inglés
MUST SCUFF

Verbo regular: scuff - scuffed - scuffed

Afirmación

Forma simple	Forma con V-ing
I must scuff you must scuff he must scuff we must scuff you must scuff they must scuff	I must be scuffing you must be scuffing he must be scuffing we must be scuffing you must be scuffing they must be scuffing
Perfecto	Perfecto con V-ing
I must have scuffed you must have scuffed he must have scuffed we must have scuffed you must have scuffed they must have scuffed	I must have been scuffing you must have been scuffing he must have been scuffing we must have been scuffing you must have been scuffing they must have been scuffing

Negación

Forma simple	Forma con V-ing
I must not scuff you must not scuff he must not scuff we must not scuff you must not scuff they must not scuff	I must not be scuffing you must not be scuffing he must not be scuffing we must not be scuffing you must not be scuffing they must not be scuffing
Perfecto	Perfecto con V-ing
I must not have scuffed you must not have scuffed he must not have scuffed we must not have scuffed you must not have scuffed they must not have scuffed	I must not have been scuffing you must not have been scuffing he must not have been scuffing we must not have been scuffing you must not have been scuffing they must not have been scuffing

Forma interrogativa

Forma simple	Forma con V-ing
must I scuff? must you scuff? must he scuff? must we scuff? must you scuff? must they scuff?	must I be scuffing? must you be scuffing? must he be scuffing? must we be scuffing? must you be scuffing? must they be scuffing?
Perfecto	Perfecto con V-ing
must I have scuffed? must you have scuffed? must he have scuffed? must we have scuffed? must you have scuffed? must they have scuffed?	must I have been scuffing? must you have been scuffing? must he have been scuffing? must we have been scuffing? must you have been scuffing? must they have been scuffing?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not scuff? must you not scuff? must he not scuff? must we not scuff? must you not scuff? must they not scuff?	must I not be scuffing? must you not be scuffing? must he not be scuffing? must we not be scuffing? must you not be scuffing? must they not be scuffing?
Perfecto	Perfecto con V-ing
must I not have scuffed? must you not have scuffed? must he not have scuffed? must we not have scuffed? must you not have scuffed? must they not have scuffed?	must I not have been scuffing? must you not have been scuffing? must he not have been scuffing? must we not have been scuffing? must you not have been scuffing? must they not have been scuffing?