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 couldn't slab you couldn't slab he couldn't slab we couldn't slab you couldn't slab they couldn't slab	I couldn't be slabing you couldn't be slabing he couldn't be slabing we couldn't be slabing you couldn't be slabing they couldn't be slabing
Perfect	V-ing perfect
I couldn't have slabed you couldn't have slabed he couldn't have slabed we couldn't have slabed you couldn't have slabed they couldn't have slabed	I couldn't have been slabing you couldn't have been slabing he couldn't have been slabing we couldn't have been slabing you couldn't have been slabing they couldn't 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
couldn't I slab? couldn't you slab? couldn't he slab? couldn't we slab? couldn't you slab? couldn't they slab?	couldn't I be slabing? couldn't you be slabing? couldn't he be slabing? couldn't we be slabing? couldn't you be slabing? couldn't they be slabing?
Perfect	V-ing perfect
couldn't I have slabed? couldn't you have slabed? couldn't he have slabed? couldn't we have slabed? couldn't you have slabed? couldn't they have slabed?	couldn't I have been slabing? couldn't you have been slabing? couldn't he have been slabing? couldn't we have been slabing? couldn't you have been slabing? couldn't they have been slabing?