I can wave you can wave he can wave we can wave you can wave they can wave
V-ing form
I can be waving you can be waving he can be waving we can be waving you can be waving they can be waving
Perfect
I can have waved you can have waved he can have waved we can have waved you can have waved they can have waved
V-ing perfect
I can have been waving you can have been waving he can have been waving we can have been waving you can have been waving they can have been waving
Negation
Simple form
I can't wave you can't wave he can't wave we can't wave you can't wave they can't wave
V-ing form
I can't be waving you can't be waving he can't be waving we can't be waving you can't be waving they can't be waving
Perfect
I can't have waved you can't have waved he can't have waved we can't have waved you can't have waved they can't have waved
V-ing perfect
I can't have been waving you can't have been waving he can't have been waving we can't have been waving you can't have been waving they can't have been waving
Interrogative form
Simple form
can I wave? can you wave? can he wave? can we wave? can you wave? can they wave?
V-ing form
can I be waving? can you be waving? can he be waving? can we be waving? can you be waving? can they be waving?
Perfect
can I have waved? can you have waved? can he have waved? can we have waved? can you have waved? can they have waved?
V-ing perfect
can I have been waving? can you have been waving? can he have been waving? can we have been waving? can you have been waving? can they have been waving?
Interro-negative form
Simple form
can't I wave? can't you wave? can't he wave? can't we wave? can't you wave? can't they wave?
V-ing form
can't I be waving? can't you be waving? can't he be waving? can't we be waving? can't you be waving? can't they be waving?
Perfect
can't I have waved? can't you have waved? can't he have waved? can't we have waved? can't you have waved? can't they have waved?
V-ing perfect
can't I have been waving? can't you have been waving? can't he have been waving? can't we have been waving? can't you have been waving? can't they have been waving?