English verb conjugation
COULD POSTULATE

Regular verb: postulate - postulated - postulated

Affirmation

Simple form	V-ing form
I could postulate you could postulate she could postulate we could postulate you could postulate they could postulate	I could be postulating you could be postulating she could be postulating we could be postulating you could be postulating they could be postulating
Perfect	V-ing perfect
I could have postulated you could have postulated she could have postulated we could have postulated you could have postulated they could have postulated	I could have been postulating you could have been postulating she could have been postulating we could have been postulating you could have been postulating they could have been postulating

Negation

Simple form	V-ing form
I couldn't postulate you couldn't postulate she couldn't postulate we couldn't postulate you couldn't postulate they couldn't postulate	I couldn't be postulating you couldn't be postulating she couldn't be postulating we couldn't be postulating you couldn't be postulating they couldn't be postulating
Perfect	V-ing perfect
I couldn't have postulated you couldn't have postulated she couldn't have postulated we couldn't have postulated you couldn't have postulated they couldn't have postulated	I couldn't have been postulating you couldn't have been postulating she couldn't have been postulating we couldn't have been postulating you couldn't have been postulating they couldn't have been postulating

Interrogative form

Simple form	V-ing form
could I postulate? could you postulate? could she postulate? could we postulate? could you postulate? could they postulate?	could I be postulating? could you be postulating? could she be postulating? could we be postulating? could you be postulating? could they be postulating?
Perfect	V-ing perfect
could I have postulated? could you have postulated? could she have postulated? could we have postulated? could you have postulated? could they have postulated?	could I have been postulating? could you have been postulating? could she have been postulating? could we have been postulating? could you have been postulating? could they have been postulating?

Interro-negative form

Simple form	V-ing form
couldn't I postulate? couldn't you postulate? couldn't she postulate? couldn't we postulate? couldn't you postulate? couldn't they postulate?	couldn't I be postulating? couldn't you be postulating? couldn't she be postulating? couldn't we be postulating? couldn't you be postulating? couldn't they be postulating?
Perfect	V-ing perfect
couldn't I have postulated? couldn't you have postulated? couldn't she have postulated? couldn't we have postulated? couldn't you have postulated? couldn't they have postulated?	couldn't I have been postulating? couldn't you have been postulating? couldn't she have been postulating? couldn't we have been postulating? couldn't you have been postulating? couldn't they have been postulating?