English verb conjugation
MUST SCAB

Regular verb: scab - scabbed - scabbed

Affirmation

Simple form	V-ing form
I must scab you must scab he must scab we must scab you must scab they must scab	I must be scabbing you must be scabbing he must be scabbing we must be scabbing you must be scabbing they must be scabbing
Perfect	V-ing perfect
I must have scabbed you must have scabbed he must have scabbed we must have scabbed you must have scabbed they must have scabbed	I must have been scabbing you must have been scabbing he must have been scabbing we must have been scabbing you must have been scabbing they must have been scabbing

Negation

Simple form	V-ing form
I must not scab you must not scab he must not scab we must not scab you must not scab they must not scab	I must not be scabbing you must not be scabbing he must not be scabbing we must not be scabbing you must not be scabbing they must not be scabbing
Perfect	V-ing perfect
I must not have scabbed you must not have scabbed he must not have scabbed we must not have scabbed you must not have scabbed they must not have scabbed	I must not have been scabbing you must not have been scabbing he must not have been scabbing we must not have been scabbing you must not have been scabbing they must not have been scabbing

Interrogative form

Simple form	V-ing form
must I scab? must you scab? must he scab? must we scab? must you scab? must they scab?	must I be scabbing? must you be scabbing? must he be scabbing? must we be scabbing? must you be scabbing? must they be scabbing?
Perfect	V-ing perfect
must I have scabbed? must you have scabbed? must he have scabbed? must we have scabbed? must you have scabbed? must they have scabbed?	must I have been scabbing? must you have been scabbing? must he have been scabbing? must we have been scabbing? must you have been scabbing? must they have been scabbing?

Interro-negative form

Simple form	V-ing form
must I not scab? must you not scab? must he not scab? must we not scab? must you not scab? must they not scab?	must I not be scabbing? must you not be scabbing? must he not be scabbing? must we not be scabbing? must you not be scabbing? must they not be scabbing?
Perfect	V-ing perfect
must I not have scabbed? must you not have scabbed? must he not have scabbed? must we not have scabbed? must you not have scabbed? must they not have scabbed?	must I not have been scabbing? must you not have been scabbing? must he not have been scabbing? must we not have been scabbing? must you not have been scabbing? must they not have been scabbing?