Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could defeat. overcome you could defeat. overcome he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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?