English verb conjugation
COULD PREESTABLISH

Regular verb: preestablish - preestablished - preestablished

Affirmation

Simple form	V-ing form
I could preestablish you could preestablish he could preestablish we could preestablish you could preestablish they could preestablish	I could be preestablishing you could be preestablishing he could be preestablishing we could be preestablishing you could be preestablishing they could be preestablishing
Perfect	V-ing perfect
I could have preestablished you could have preestablished he could have preestablished we could have preestablished you could have preestablished they could have preestablished	I could have been preestablishing you could have been preestablishing he could have been preestablishing we could have been preestablishing you could have been preestablishing they could have been preestablishing

Negation

Simple form	V-ing form
I couldn't preestablish you couldn't preestablish he couldn't preestablish we couldn't preestablish you couldn't preestablish they couldn't preestablish	I couldn't be preestablishing you couldn't be preestablishing he couldn't be preestablishing we couldn't be preestablishing you couldn't be preestablishing they couldn't be preestablishing
Perfect	V-ing perfect
I couldn't have preestablished you couldn't have preestablished he couldn't have preestablished we couldn't have preestablished you couldn't have preestablished they couldn't have preestablished	I couldn't have been preestablishing you couldn't have been preestablishing he couldn't have been preestablishing we couldn't have been preestablishing you couldn't have been preestablishing they couldn't have been preestablishing

Interrogative form

Simple form	V-ing form
could I preestablish? could you preestablish? could he preestablish? could we preestablish? could you preestablish? could they preestablish?	could I be preestablishing? could you be preestablishing? could he be preestablishing? could we be preestablishing? could you be preestablishing? could they be preestablishing?
Perfect	V-ing perfect
could I have preestablished? could you have preestablished? could he have preestablished? could we have preestablished? could you have preestablished? could they have preestablished?	could I have been preestablishing? could you have been preestablishing? could he have been preestablishing? could we have been preestablishing? could you have been preestablishing? could they have been preestablishing?

Interro-negative form

Simple form	V-ing form
couldn't I preestablish? couldn't you preestablish? couldn't he preestablish? couldn't we preestablish? couldn't you preestablish? couldn't they preestablish?	couldn't I be preestablishing? couldn't you be preestablishing? couldn't he be preestablishing? couldn't we be preestablishing? couldn't you be preestablishing? couldn't they be preestablishing?
Perfect	V-ing perfect
couldn't I have preestablished? couldn't you have preestablished? couldn't he have preestablished? couldn't we have preestablished? couldn't you have preestablished? couldn't they have preestablished?	couldn't I have been preestablishing? couldn't you have been preestablishing? couldn't he have been preestablishing? couldn't we have been preestablishing? couldn't you have been preestablishing? couldn't they have been preestablishing?