English verb conjugation
COULD SLAB

Regular verb: slab - slabed - slabed

Affirmation

Simple form	V-ing form
I could slab you could slab he could slab we could slab you could slab they could slab	I could be slabing you could be slabing he could be slabing we could be slabing you could be slabing they could be slabing
Perfect	V-ing perfect
I could have slabed you could have slabed he could have slabed we could have slabed you could have slabed they could have slabed	I could have been slabing you could have been slabing he could have been slabing we could have been slabing you could have been slabing they could have been slabing

Negation

Simple form	V-ing form
I could not slab you could not slab he could not slab we could not slab you could not slab they could not slab	I could not be slabing you could not be slabing he could not be slabing we could not be slabing you could not be slabing they could not be slabing
Perfect	V-ing perfect
I could not have slabed you could not have slabed he could not have slabed we could not have slabed you could not have slabed they could not have slabed	I could not have been slabing you could not have been slabing he could not have been slabing we could not have been slabing you could not have been slabing they could not have been slabing

Interrogative form

Simple form	V-ing form
could I slab? could you slab? could he slab? could we slab? could you slab? could they slab?	could I be slabing? could you be slabing? could he be slabing? could we be slabing? could you be slabing? could they be slabing?
Perfect	V-ing perfect
could I have slabed? could you have slabed? could he have slabed? could we have slabed? could you have slabed? could they have slabed?	could I have been slabing? could you have been slabing? could he have been slabing? could we have been slabing? could you have been slabing? could they have been slabing?

Interro-negative form

Simple form	V-ing form
could I not slab? could you not slab? could he not slab? could we not slab? could you not slab? could they not slab?	could I not be slabing? could you not be slabing? could he not be slabing? could we not be slabing? could you not be slabing? could they not be slabing?
Perfect	V-ing perfect
could I not have slabed? could you not have slabed? could he not have slabed? could we not have slabed? could you not have slabed? could they not have slabed?	could I not have been slabing? could you not have been slabing? could he not have been slabing? could we not have been slabing? could you not have been slabing? could they not have been slabing?