English verb conjugation
COULD CENTRALISE

Regular verb: centralise - centralised - centralised

Affirmation

Simple form	V-ing form
I could centralise you could centralise he could centralise we could centralise you could centralise they could centralise	I could be centralising you could be centralising he could be centralising we could be centralising you could be centralising they could be centralising
Perfect	V-ing perfect
I could have centralised you could have centralised he could have centralised we could have centralised you could have centralised they could have centralised	I could have been centralising you could have been centralising he could have been centralising we could have been centralising you could have been centralising they could have been centralising

Negation

Simple form	V-ing form
I couldn't centralise you couldn't centralise he couldn't centralise we couldn't centralise you couldn't centralise they couldn't centralise	I couldn't be centralising you couldn't be centralising he couldn't be centralising we couldn't be centralising you couldn't be centralising they couldn't be centralising
Perfect	V-ing perfect
I couldn't have centralised you couldn't have centralised he couldn't have centralised we couldn't have centralised you couldn't have centralised they couldn't have centralised	I couldn't have been centralising you couldn't have been centralising he couldn't have been centralising we couldn't have been centralising you couldn't have been centralising they couldn't have been centralising

Interrogative form

Simple form	V-ing form
could I centralise? could you centralise? could he centralise? could we centralise? could you centralise? could they centralise?	could I be centralising? could you be centralising? could he be centralising? could we be centralising? could you be centralising? could they be centralising?
Perfect	V-ing perfect
could I have centralised? could you have centralised? could he have centralised? could we have centralised? could you have centralised? could they have centralised?	could I have been centralising? could you have been centralising? could he have been centralising? could we have been centralising? could you have been centralising? could they have been centralising?

Interro-negative form

Simple form	V-ing form
couldn't I centralise? couldn't you centralise? couldn't he centralise? couldn't we centralise? couldn't you centralise? couldn't they centralise?	couldn't I be centralising? couldn't you be centralising? couldn't he be centralising? couldn't we be centralising? couldn't you be centralising? couldn't they be centralising?
Perfect	V-ing perfect
couldn't I have centralised? couldn't you have centralised? couldn't he have centralised? couldn't we have centralised? couldn't you have centralised? couldn't they have centralised?	couldn't I have been centralising? couldn't you have been centralising? couldn't he have been centralising? couldn't we have been centralising? couldn't you have been centralising? couldn't they have been centralising?