Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could assemble attach you could assemble attach he could assemble attach we could assemble attach you could assemble attach they could assemble attach
V-ing form
I could be assemble attaching you could be assemble attaching he could be assemble attaching we could be assemble attaching you could be assemble attaching they could be assemble attaching
Perfect
I could have assemble attached you could have assemble attached he could have assemble attached we could have assemble attached you could have assemble attached they could have assemble attached
V-ing perfect
I could have been assemble attaching you could have been assemble attaching he could have been assemble attaching we could have been assemble attaching you could have been assemble attaching they could have been assemble attaching
Negation
Simple form
I could not assemble attach you could not assemble attach he could not assemble attach we could not assemble attach you could not assemble attach they could not assemble attach
V-ing form
I could not be assemble attaching you could not be assemble attaching he could not be assemble attaching we could not be assemble attaching you could not be assemble attaching they could not be assemble attaching
Perfect
I could not have assemble attached you could not have assemble attached he could not have assemble attached we could not have assemble attached you could not have assemble attached they could not have assemble attached
V-ing perfect
I could not have been assemble attaching you could not have been assemble attaching he could not have been assemble attaching we could not have been assemble attaching you could not have been assemble attaching they could not have been assemble attaching
Interrogative form
Simple form
could I assemble attach? could you assemble attach? could he assemble attach? could we assemble attach? could you assemble attach? could they assemble attach?
V-ing form
could I be assemble attaching? could you be assemble attaching? could he be assemble attaching? could we be assemble attaching? could you be assemble attaching? could they be assemble attaching?
Perfect
could I have assemble attached? could you have assemble attached? could he have assemble attached? could we have assemble attached? could you have assemble attached? could they have assemble attached?
V-ing perfect
could I have been assemble attaching? could you have been assemble attaching? could he have been assemble attaching? could we have been assemble attaching? could you have been assemble attaching? could they have been assemble attaching?
Interro-negative form
Simple form
could I not assemble attach? could you not assemble attach? could he not assemble attach? could we not assemble attach? could you not assemble attach? could they not assemble attach?
V-ing form
could I not be assemble attaching? could you not be assemble attaching? could he not be assemble attaching? could we not be assemble attaching? could you not be assemble attaching? could they not be assemble attaching?
Perfect
could I not have assemble attached? could you not have assemble attached? could he not have assemble attached? could we not have assemble attached? could you not have assemble attached? could they not have assemble attached?
V-ing perfect
could I not have been assemble attaching? could you not have been assemble attaching? could he not have been assemble attaching? could we not have been assemble attaching? could you not have been assemble attaching? could they not have been assemble attaching?