I can defeat you can defeat she can defeat we can defeat you can defeat they can defeat
V-ing form
I can be defeating you can be defeating she can be defeating we can be defeating you can be defeating they can be defeating
Perfect
I can have defeated you can have defeated she can have defeated we can have defeated you can have defeated they can have defeated
V-ing perfect
I can have been defeating you can have been defeating she can have been defeating we can have been defeating you can have been defeating they can have been defeating
Negation
Simple form
I cannot defeat you cannot defeat she cannot defeat we cannot defeat you cannot defeat they cannot defeat
V-ing form
I cannot be defeating you cannot be defeating she cannot be defeating we cannot be defeating you cannot be defeating they cannot be defeating
Perfect
I cannot have defeated you cannot have defeated she cannot have defeated we cannot have defeated you cannot have defeated they cannot have defeated
V-ing perfect
I cannot have been defeating you cannot have been defeating she cannot have been defeating we cannot have been defeating you cannot have been defeating they cannot have been defeating
Interrogative form
Simple form
can I defeat? can you defeat? can she defeat? can we defeat? can you defeat? can they defeat?
V-ing form
can I be defeating? can you be defeating? can she be defeating? can we be defeating? can you be defeating? can they be defeating?
Perfect
can I have defeated? can you have defeated? can she have defeated? can we have defeated? can you have defeated? can they have defeated?
V-ing perfect
can I have been defeating? can you have been defeating? can she have been defeating? can we have been defeating? can you have been defeating? can they have been defeating?
Interro-negative form
Simple form
can I not defeat? can you not defeat? can she not defeat? can we not defeat? can you not defeat? can they not defeat?
V-ing form
can I not be defeating? can you not be defeating? can she not be defeating? can we not be defeating? can you not be defeating? can they not be defeating?
Perfect
can I not have defeated? can you not have defeated? can she not have defeated? can we not have defeated? can you not have defeated? can they not have defeated?
V-ing perfect
can I not have been defeating? can you not have been defeating? can she not have been defeating? can we not have been defeating? can you not have been defeating? can they not have been defeating?