Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could vae in you could vae in he could vae in we could vae in you could vae in they could vae in
V-ing form
I could be vae ining you could be vae ining he could be vae ining we could be vae ining you could be vae ining they could be vae ining
Perfect
I could have vae ined you could have vae ined he could have vae ined we could have vae ined you could have vae ined they could have vae ined
V-ing perfect
I could have been vae ining you could have been vae ining he could have been vae ining we could have been vae ining you could have been vae ining they could have been vae ining
Negation
Simple form
I couldn't vae in you couldn't vae in he couldn't vae in we couldn't vae in you couldn't vae in they couldn't vae in
V-ing form
I couldn't be vae ining you couldn't be vae ining he couldn't be vae ining we couldn't be vae ining you couldn't be vae ining they couldn't be vae ining
Perfect
I couldn't have vae ined you couldn't have vae ined he couldn't have vae ined we couldn't have vae ined you couldn't have vae ined they couldn't have vae ined
V-ing perfect
I couldn't have been vae ining you couldn't have been vae ining he couldn't have been vae ining we couldn't have been vae ining you couldn't have been vae ining they couldn't have been vae ining
Interrogative form
Simple form
could I vae in? could you vae in? could he vae in? could we vae in? could you vae in? could they vae in?
V-ing form
could I be vae ining? could you be vae ining? could he be vae ining? could we be vae ining? could you be vae ining? could they be vae ining?
Perfect
could I have vae ined? could you have vae ined? could he have vae ined? could we have vae ined? could you have vae ined? could they have vae ined?
V-ing perfect
could I have been vae ining? could you have been vae ining? could he have been vae ining? could we have been vae ining? could you have been vae ining? could they have been vae ining?
Interro-negative form
Simple form
couldn't I vae in? couldn't you vae in? couldn't he vae in? couldn't we vae in? couldn't you vae in? couldn't they vae in?
V-ing form
couldn't I be vae ining? couldn't you be vae ining? couldn't he be vae ining? couldn't we be vae ining? couldn't you be vae ining? couldn't they be vae ining?
Perfect
couldn't I have vae ined? couldn't you have vae ined? couldn't he have vae ined? couldn't we have vae ined? couldn't you have vae ined? couldn't they have vae ined?
V-ing perfect
couldn't I have been vae ining? couldn't you have been vae ining? couldn't he have been vae ining? couldn't we have been vae ining? couldn't you have been vae ining? couldn't they have been vae ining?