I can overcome you can overcome he can overcome we can overcome you can overcome they can overcome
V-ing form
I can be overcoming you can be overcoming he can be overcoming we can be overcoming you can be overcoming they can be overcoming
Perfect
I can have overcome you can have overcome he can have overcome we can have overcome you can have overcome they can have overcome
V-ing perfect
I can have been overcoming you can have been overcoming he can have been overcoming we can have been overcoming you can have been overcoming they can have been overcoming
Negation
Simple form
I cannot overcome you cannot overcome he cannot overcome we cannot overcome you cannot overcome they cannot overcome
V-ing form
I cannot be overcoming you cannot be overcoming he cannot be overcoming we cannot be overcoming you cannot be overcoming they cannot be overcoming
Perfect
I cannot have overcome you cannot have overcome he cannot have overcome we cannot have overcome you cannot have overcome they cannot have overcome
V-ing perfect
I cannot have been overcoming you cannot have been overcoming he cannot have been overcoming we cannot have been overcoming you cannot have been overcoming they cannot have been overcoming
Interrogative form
Simple form
can I overcome? can you overcome? can he overcome? can we overcome? can you overcome? can they overcome?
V-ing form
can I be overcoming? can you be overcoming? can he be overcoming? can we be overcoming? can you be overcoming? can they be overcoming?
Perfect
can I have overcome? can you have overcome? can he have overcome? can we have overcome? can you have overcome? can they have overcome?
V-ing perfect
can I have been overcoming? can you have been overcoming? can he have been overcoming? can we have been overcoming? can you have been overcoming? can they have been overcoming?
Interro-negative form
Simple form
can I not overcome? can you not overcome? can he not overcome? can we not overcome? can you not overcome? can they not overcome?
V-ing form
can I not be overcoming? can you not be overcoming? can he not be overcoming? can we not be overcoming? can you not be overcoming? can they not be overcoming?
Perfect
can I not have overcome? can you not have overcome? can he not have overcome? can we not have overcome? can you not have overcome? can they not have overcome?
V-ing perfect
can I not have been overcoming? can you not have been overcoming? can he not have been overcoming? can we not have been overcoming? can you not have been overcoming? can they not have been overcoming?