Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could relinquish surrender you could relinquish surrender she could relinquish surrender we could relinquish surrender you could relinquish surrender they could relinquish surrender
V-ing form
I could be relinquish surrendering you could be relinquish surrendering she could be relinquish surrendering we could be relinquish surrendering you could be relinquish surrendering they could be relinquish surrendering
Perfect
I could have relinquish surrendered you could have relinquish surrendered she could have relinquish surrendered we could have relinquish surrendered you could have relinquish surrendered they could have relinquish surrendered
V-ing perfect
I could have been relinquish surrendering you could have been relinquish surrendering she could have been relinquish surrendering we could have been relinquish surrendering you could have been relinquish surrendering they could have been relinquish surrendering
Negation
Simple form
I couldn't relinquish surrender you couldn't relinquish surrender she couldn't relinquish surrender we couldn't relinquish surrender you couldn't relinquish surrender they couldn't relinquish surrender
V-ing form
I couldn't be relinquish surrendering you couldn't be relinquish surrendering she couldn't be relinquish surrendering we couldn't be relinquish surrendering you couldn't be relinquish surrendering they couldn't be relinquish surrendering
Perfect
I couldn't have relinquish surrendered you couldn't have relinquish surrendered she couldn't have relinquish surrendered we couldn't have relinquish surrendered you couldn't have relinquish surrendered they couldn't have relinquish surrendered
V-ing perfect
I couldn't have been relinquish surrendering you couldn't have been relinquish surrendering she couldn't have been relinquish surrendering we couldn't have been relinquish surrendering you couldn't have been relinquish surrendering they couldn't have been relinquish surrendering
Interrogative form
Simple form
could I relinquish surrender? could you relinquish surrender? could she relinquish surrender? could we relinquish surrender? could you relinquish surrender? could they relinquish surrender?
V-ing form
could I be relinquish surrendering? could you be relinquish surrendering? could she be relinquish surrendering? could we be relinquish surrendering? could you be relinquish surrendering? could they be relinquish surrendering?
Perfect
could I have relinquish surrendered? could you have relinquish surrendered? could she have relinquish surrendered? could we have relinquish surrendered? could you have relinquish surrendered? could they have relinquish surrendered?
V-ing perfect
could I have been relinquish surrendering? could you have been relinquish surrendering? could she have been relinquish surrendering? could we have been relinquish surrendering? could you have been relinquish surrendering? could they have been relinquish surrendering?
Interro-negative form
Simple form
couldn't I relinquish surrender? couldn't you relinquish surrender? couldn't she relinquish surrender? couldn't we relinquish surrender? couldn't you relinquish surrender? couldn't they relinquish surrender?
V-ing form
couldn't I be relinquish surrendering? couldn't you be relinquish surrendering? couldn't she be relinquish surrendering? couldn't we be relinquish surrendering? couldn't you be relinquish surrendering? couldn't they be relinquish surrendering?
Perfect
couldn't I have relinquish surrendered? couldn't you have relinquish surrendered? couldn't she have relinquish surrendered? couldn't we have relinquish surrendered? couldn't you have relinquish surrendered? couldn't they have relinquish surrendered?
V-ing perfect
couldn't I have been relinquish surrendering? couldn't you have been relinquish surrendering? couldn't she have been relinquish surrendering? couldn't we have been relinquish surrendering? couldn't you have been relinquish surrendering? couldn't they have been relinquish surrendering?