I can choke you can choke he can choke we can choke you can choke they can choke
V-ing form
I can be choking you can be choking he can be choking we can be choking you can be choking they can be choking
Perfect
I can have choked you can have choked he can have choked we can have choked you can have choked they can have choked
V-ing perfect
I can have been choking you can have been choking he can have been choking we can have been choking you can have been choking they can have been choking
Negation
Simple form
I can't choke you can't choke he can't choke we can't choke you can't choke they can't choke
V-ing form
I can't be choking you can't be choking he can't be choking we can't be choking you can't be choking they can't be choking
Perfect
I can't have choked you can't have choked he can't have choked we can't have choked you can't have choked they can't have choked
V-ing perfect
I can't have been choking you can't have been choking he can't have been choking we can't have been choking you can't have been choking they can't have been choking
Interrogative form
Simple form
can I choke? can you choke? can he choke? can we choke? can you choke? can they choke?
V-ing form
can I be choking? can you be choking? can he be choking? can we be choking? can you be choking? can they be choking?
Perfect
can I have choked? can you have choked? can he have choked? can we have choked? can you have choked? can they have choked?
V-ing perfect
can I have been choking? can you have been choking? can he have been choking? can we have been choking? can you have been choking? can they have been choking?
Interro-negative form
Simple form
can't I choke? can't you choke? can't he choke? can't we choke? can't you choke? can't they choke?
V-ing form
can't I be choking? can't you be choking? can't he be choking? can't we be choking? can't you be choking? can't they be choking?
Perfect
can't I have choked? can't you have choked? can't he have choked? can't we have choked? can't you have choked? can't they have choked?
V-ing perfect
can't I have been choking? can't you have been choking? can't he have been choking? can't we have been choking? can't you have been choking? can't they have been choking?