English verb conjugation
COULD OVULATE

Regular verb: ovulate - ovulated - ovulated

Affirmation

Simple form	V-ing form
I could ovulate you could ovulate she could ovulate we could ovulate you could ovulate they could ovulate	I could be ovulating you could be ovulating she could be ovulating we could be ovulating you could be ovulating they could be ovulating
Perfect	V-ing perfect
I could have ovulated you could have ovulated she could have ovulated we could have ovulated you could have ovulated they could have ovulated	I could have been ovulating you could have been ovulating she could have been ovulating we could have been ovulating you could have been ovulating they could have been ovulating

Negation

Simple form	V-ing form
I couldn't ovulate you couldn't ovulate she couldn't ovulate we couldn't ovulate you couldn't ovulate they couldn't ovulate	I couldn't be ovulating you couldn't be ovulating she couldn't be ovulating we couldn't be ovulating you couldn't be ovulating they couldn't be ovulating
Perfect	V-ing perfect
I couldn't have ovulated you couldn't have ovulated she couldn't have ovulated we couldn't have ovulated you couldn't have ovulated they couldn't have ovulated	I couldn't have been ovulating you couldn't have been ovulating she couldn't have been ovulating we couldn't have been ovulating you couldn't have been ovulating they couldn't have been ovulating

Interrogative form

Simple form	V-ing form
could I ovulate? could you ovulate? could she ovulate? could we ovulate? could you ovulate? could they ovulate?	could I be ovulating? could you be ovulating? could she be ovulating? could we be ovulating? could you be ovulating? could they be ovulating?
Perfect	V-ing perfect
could I have ovulated? could you have ovulated? could she have ovulated? could we have ovulated? could you have ovulated? could they have ovulated?	could I have been ovulating? could you have been ovulating? could she have been ovulating? could we have been ovulating? could you have been ovulating? could they have been ovulating?

Interro-negative form

Simple form	V-ing form
couldn't I ovulate? couldn't you ovulate? couldn't she ovulate? couldn't we ovulate? couldn't you ovulate? couldn't they ovulate?	couldn't I be ovulating? couldn't you be ovulating? couldn't she be ovulating? couldn't we be ovulating? couldn't you be ovulating? couldn't they be ovulating?
Perfect	V-ing perfect
couldn't I have ovulated? couldn't you have ovulated? couldn't she have ovulated? couldn't we have ovulated? couldn't you have ovulated? couldn't they have ovulated?	couldn't I have been ovulating? couldn't you have been ovulating? couldn't she have been ovulating? couldn't we have been ovulating? couldn't you have been ovulating? couldn't they have been ovulating?