I can advocate you can advocate he can advocate we can advocate you can advocate they can advocate
V-ing form
I can be advocating you can be advocating he can be advocating we can be advocating you can be advocating they can be advocating
Perfect
I can have advocated you can have advocated he can have advocated we can have advocated you can have advocated they can have advocated
V-ing perfect
I can have been advocating you can have been advocating he can have been advocating we can have been advocating you can have been advocating they can have been advocating
Negation
Simple form
I can't advocate you can't advocate he can't advocate we can't advocate you can't advocate they can't advocate
V-ing form
I can't be advocating you can't be advocating he can't be advocating we can't be advocating you can't be advocating they can't be advocating
Perfect
I can't have advocated you can't have advocated he can't have advocated we can't have advocated you can't have advocated they can't have advocated
V-ing perfect
I can't have been advocating you can't have been advocating he can't have been advocating we can't have been advocating you can't have been advocating they can't have been advocating
Interrogative form
Simple form
can I advocate? can you advocate? can he advocate? can we advocate? can you advocate? can they advocate?
V-ing form
can I be advocating? can you be advocating? can he be advocating? can we be advocating? can you be advocating? can they be advocating?
Perfect
can I have advocated? can you have advocated? can he have advocated? can we have advocated? can you have advocated? can they have advocated?
V-ing perfect
can I have been advocating? can you have been advocating? can he have been advocating? can we have been advocating? can you have been advocating? can they have been advocating?
Interro-negative form
Simple form
can't I advocate? can't you advocate? can't he advocate? can't we advocate? can't you advocate? can't they advocate?
V-ing form
can't I be advocating? can't you be advocating? can't he be advocating? can't we be advocating? can't you be advocating? can't they be advocating?
Perfect
can't I have advocated? can't you have advocated? can't he have advocated? can't we have advocated? can't you have advocated? can't they have advocated?
V-ing perfect
can't I have been advocating? can't you have been advocating? can't he have been advocating? can't we have been advocating? can't you have been advocating? can't they have been advocating?