English verb conjugation
COULD UNHARNESS

Regular verb: unharness - unharnessed - unharnessed

Affirmation

Simple form	V-ing form
I could unharness you could unharness he could unharness we could unharness you could unharness they could unharness	I could be unharnessing you could be unharnessing he could be unharnessing we could be unharnessing you could be unharnessing they could be unharnessing
Perfect	V-ing perfect
I could have unharnessed you could have unharnessed he could have unharnessed we could have unharnessed you could have unharnessed they could have unharnessed	I could have been unharnessing you could have been unharnessing he could have been unharnessing we could have been unharnessing you could have been unharnessing they could have been unharnessing

Negation

Simple form	V-ing form
I couldn't unharness you couldn't unharness he couldn't unharness we couldn't unharness you couldn't unharness they couldn't unharness	I couldn't be unharnessing you couldn't be unharnessing he couldn't be unharnessing we couldn't be unharnessing you couldn't be unharnessing they couldn't be unharnessing
Perfect	V-ing perfect
I couldn't have unharnessed you couldn't have unharnessed he couldn't have unharnessed we couldn't have unharnessed you couldn't have unharnessed they couldn't have unharnessed	I couldn't have been unharnessing you couldn't have been unharnessing he couldn't have been unharnessing we couldn't have been unharnessing you couldn't have been unharnessing they couldn't have been unharnessing

Interrogative form

Simple form	V-ing form
could I unharness? could you unharness? could he unharness? could we unharness? could you unharness? could they unharness?	could I be unharnessing? could you be unharnessing? could he be unharnessing? could we be unharnessing? could you be unharnessing? could they be unharnessing?
Perfect	V-ing perfect
could I have unharnessed? could you have unharnessed? could he have unharnessed? could we have unharnessed? could you have unharnessed? could they have unharnessed?	could I have been unharnessing? could you have been unharnessing? could he have been unharnessing? could we have been unharnessing? could you have been unharnessing? could they have been unharnessing?

Interro-negative form

Simple form	V-ing form
couldn't I unharness? couldn't you unharness? couldn't he unharness? couldn't we unharness? couldn't you unharness? couldn't they unharness?	couldn't I be unharnessing? couldn't you be unharnessing? couldn't he be unharnessing? couldn't we be unharnessing? couldn't you be unharnessing? couldn't they be unharnessing?
Perfect	V-ing perfect
couldn't I have unharnessed? couldn't you have unharnessed? couldn't he have unharnessed? couldn't we have unharnessed? couldn't you have unharnessed? couldn't they have unharnessed?	couldn't I have been unharnessing? couldn't you have been unharnessing? couldn't he have been unharnessing? couldn't we have been unharnessing? couldn't you have been unharnessing? couldn't they have been unharnessing?