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