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