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