I can dissertate you can dissertate he can dissertate we can dissertate you can dissertate they can dissertate
V-ing form
I can be dissertating you can be dissertating he can be dissertating we can be dissertating you can be dissertating they can be dissertating
Perfect
I can have dissertated you can have dissertated he can have dissertated we can have dissertated you can have dissertated they can have dissertated
V-ing perfect
I can have been dissertating you can have been dissertating he can have been dissertating we can have been dissertating you can have been dissertating they can have been dissertating
Negation
Simple form
I can't dissertate you can't dissertate he can't dissertate we can't dissertate you can't dissertate they can't dissertate
V-ing form
I can't be dissertating you can't be dissertating he can't be dissertating we can't be dissertating you can't be dissertating they can't be dissertating
Perfect
I can't have dissertated you can't have dissertated he can't have dissertated we can't have dissertated you can't have dissertated they can't have dissertated
V-ing perfect
I can't have been dissertating you can't have been dissertating he can't have been dissertating we can't have been dissertating you can't have been dissertating they can't have been dissertating
Interrogative form
Simple form
can I dissertate? can you dissertate? can he dissertate? can we dissertate? can you dissertate? can they dissertate?
V-ing form
can I be dissertating? can you be dissertating? can he be dissertating? can we be dissertating? can you be dissertating? can they be dissertating?
Perfect
can I have dissertated? can you have dissertated? can he have dissertated? can we have dissertated? can you have dissertated? can they have dissertated?
V-ing perfect
can I have been dissertating? can you have been dissertating? can he have been dissertating? can we have been dissertating? can you have been dissertating? can they have been dissertating?
Interro-negative form
Simple form
can't I dissertate? can't you dissertate? can't he dissertate? can't we dissertate? can't you dissertate? can't they dissertate?
V-ing form
can't I be dissertating? can't you be dissertating? can't he be dissertating? can't we be dissertating? can't you be dissertating? can't they be dissertating?
Perfect
can't I have dissertated? can't you have dissertated? can't he have dissertated? can't we have dissertated? can't you have dissertated? can't they have dissertated?
V-ing perfect
can't I have been dissertating? can't you have been dissertating? can't he have been dissertating? can't we have been dissertating? can't you have been dissertating? can't they have been dissertating?