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