I can defeat you can defeat he can defeat we can defeat you can defeat they can defeat
V-ing form
I can be defeating you can be defeating he can be defeating we can be defeating you can be defeating they can be defeating
Perfect
I can have defeated you can have defeated he 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 he can have been defeating we can have been defeating you can have been defeating they can have been defeating
Negation
Simple form
I can't defeat you can't defeat he can't defeat we can't defeat you can't defeat they can't defeat
V-ing form
I can't be defeating you can't be defeating he can't be defeating we can't be defeating you can't be defeating they can't be defeating
Perfect
I can't have defeated you can't have defeated he can't have defeated we can't have defeated you can't have defeated they can't have defeated
V-ing perfect
I can't have been defeating you can't have been defeating he can't have been defeating we can't have been defeating you can't have been defeating they can't have been defeating
Interrogative form
Simple form
can I defeat? can you defeat? can he defeat? can we defeat? can you defeat? can they defeat?
V-ing form
can I be defeating? can you be defeating? can he be defeating? can we be defeating? can you be defeating? can they be defeating?
Perfect
can I have defeated? can you have defeated? can he 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 he have been defeating? can we have been defeating? can you have been defeating? can they have been defeating?
Interro-negative form
Simple form
can't I defeat? can't you defeat? can't he defeat? can't we defeat? can't you defeat? can't they defeat?
V-ing form
can't I be defeating? can't you be defeating? can't he be defeating? can't we be defeating? can't you be defeating? can't they be defeating?
Perfect
can't I have defeated? can't you have defeated? can't he have defeated? can't we have defeated? can't you have defeated? can't they have defeated?
V-ing perfect
can't I have been defeating? can't you have been defeating? can't he have been defeating? can't we have been defeating? can't you have been defeating? can't they have been defeating?