I can succeed you can succeed he can succeed we can succeed you can succeed they can succeed
V-ing form
I can be succeeding you can be succeeding he can be succeeding we can be succeeding you can be succeeding they can be succeeding
Perfect
I can have succeeded you can have succeeded he can have succeeded we can have succeeded you can have succeeded they can have succeeded
V-ing perfect
I can have been succeeding you can have been succeeding he can have been succeeding we can have been succeeding you can have been succeeding they can have been succeeding
Negation
Simple form
I can't succeed you can't succeed he can't succeed we can't succeed you can't succeed they can't succeed
V-ing form
I can't be succeeding you can't be succeeding he can't be succeeding we can't be succeeding you can't be succeeding they can't be succeeding
Perfect
I can't have succeeded you can't have succeeded he can't have succeeded we can't have succeeded you can't have succeeded they can't have succeeded
V-ing perfect
I can't have been succeeding you can't have been succeeding he can't have been succeeding we can't have been succeeding you can't have been succeeding they can't have been succeeding
Interrogative form
Simple form
can I succeed? can you succeed? can he succeed? can we succeed? can you succeed? can they succeed?
V-ing form
can I be succeeding? can you be succeeding? can he be succeeding? can we be succeeding? can you be succeeding? can they be succeeding?
Perfect
can I have succeeded? can you have succeeded? can he have succeeded? can we have succeeded? can you have succeeded? can they have succeeded?
V-ing perfect
can I have been succeeding? can you have been succeeding? can he have been succeeding? can we have been succeeding? can you have been succeeding? can they have been succeeding?
Interro-negative form
Simple form
can't I succeed? can't you succeed? can't he succeed? can't we succeed? can't you succeed? can't they succeed?
V-ing form
can't I be succeeding? can't you be succeeding? can't he be succeeding? can't we be succeeding? can't you be succeeding? can't they be succeeding?
Perfect
can't I have succeeded? can't you have succeeded? can't he have succeeded? can't we have succeeded? can't you have succeeded? can't they have succeeded?
V-ing perfect
can't I have been succeeding? can't you have been succeeding? can't he have been succeeding? can't we have been succeeding? can't you have been succeeding? can't they have been succeeding?