I can really you can really he can really we can really you can really they can really
V-ing form
I can be reallying you can be reallying he can be reallying we can be reallying you can be reallying they can be reallying
Perfect
I can have reallied you can have reallied he can have reallied we can have reallied you can have reallied they can have reallied
V-ing perfect
I can have been reallying you can have been reallying he can have been reallying we can have been reallying you can have been reallying they can have been reallying
Negation
Simple form
I can't really you can't really he can't really we can't really you can't really they can't really
V-ing form
I can't be reallying you can't be reallying he can't be reallying we can't be reallying you can't be reallying they can't be reallying
Perfect
I can't have reallied you can't have reallied he can't have reallied we can't have reallied you can't have reallied they can't have reallied
V-ing perfect
I can't have been reallying you can't have been reallying he can't have been reallying we can't have been reallying you can't have been reallying they can't have been reallying
Interrogative form
Simple form
can I really? can you really? can he really? can we really? can you really? can they really?
V-ing form
can I be reallying? can you be reallying? can he be reallying? can we be reallying? can you be reallying? can they be reallying?
Perfect
can I have reallied? can you have reallied? can he have reallied? can we have reallied? can you have reallied? can they have reallied?
V-ing perfect
can I have been reallying? can you have been reallying? can he have been reallying? can we have been reallying? can you have been reallying? can they have been reallying?
Interro-negative form
Simple form
can't I really? can't you really? can't he really? can't we really? can't you really? can't they really?
V-ing form
can't I be reallying? can't you be reallying? can't he be reallying? can't we be reallying? can't you be reallying? can't they be reallying?
Perfect
can't I have reallied? can't you have reallied? can't he have reallied? can't we have reallied? can't you have reallied? can't they have reallied?
V-ing perfect
can't I have been reallying? can't you have been reallying? can't he have been reallying? can't we have been reallying? can't you have been reallying? can't they have been reallying?