English verb conjugation
COULD SCAB

Regular verb: scab - scabbed - scabbed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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