English verb conjugation
COULD POSTPONE

Regular verb: postpone - postponed - postponed

Affirmation

Simple form	V-ing form
I could postpone you could postpone she could postpone we could postpone you could postpone they could postpone	I could be postponing you could be postponing she could be postponing we could be postponing you could be postponing they could be postponing
Perfect	V-ing perfect
I could have postponed you could have postponed she could have postponed we could have postponed you could have postponed they could have postponed	I could have been postponing you could have been postponing she could have been postponing we could have been postponing you could have been postponing they could have been postponing

Negation

Simple form	V-ing form
I couldn't postpone you couldn't postpone she couldn't postpone we couldn't postpone you couldn't postpone they couldn't postpone	I couldn't be postponing you couldn't be postponing she couldn't be postponing we couldn't be postponing you couldn't be postponing they couldn't be postponing
Perfect	V-ing perfect
I couldn't have postponed you couldn't have postponed she couldn't have postponed we couldn't have postponed you couldn't have postponed they couldn't have postponed	I couldn't have been postponing you couldn't have been postponing she couldn't have been postponing we couldn't have been postponing you couldn't have been postponing they couldn't have been postponing

Interrogative form

Simple form	V-ing form
could I postpone? could you postpone? could she postpone? could we postpone? could you postpone? could they postpone?	could I be postponing? could you be postponing? could she be postponing? could we be postponing? could you be postponing? could they be postponing?
Perfect	V-ing perfect
could I have postponed? could you have postponed? could she have postponed? could we have postponed? could you have postponed? could they have postponed?	could I have been postponing? could you have been postponing? could she have been postponing? could we have been postponing? could you have been postponing? could they have been postponing?

Interro-negative form

Simple form	V-ing form
couldn't I postpone? couldn't you postpone? couldn't she postpone? couldn't we postpone? couldn't you postpone? couldn't they postpone?	couldn't I be postponing? couldn't you be postponing? couldn't she be postponing? couldn't we be postponing? couldn't you be postponing? couldn't they be postponing?
Perfect	V-ing perfect
couldn't I have postponed? couldn't you have postponed? couldn't she have postponed? couldn't we have postponed? couldn't you have postponed? couldn't they have postponed?	couldn't I have been postponing? couldn't you have been postponing? couldn't she have been postponing? couldn't we have been postponing? couldn't you have been postponing? couldn't they have been postponing?