I can reduce you can reduce she can reduce we can reduce you can reduce they can reduce
V-ing form
I can be reducing you can be reducing she can be reducing we can be reducing you can be reducing they can be reducing
Perfect
I can have reduced you can have reduced she can have reduced we can have reduced you can have reduced they can have reduced
V-ing perfect
I can have been reducing you can have been reducing she can have been reducing we can have been reducing you can have been reducing they can have been reducing
Negation
Simple form
I can't reduce you can't reduce she can't reduce we can't reduce you can't reduce they can't reduce
V-ing form
I can't be reducing you can't be reducing she can't be reducing we can't be reducing you can't be reducing they can't be reducing
Perfect
I can't have reduced you can't have reduced she can't have reduced we can't have reduced you can't have reduced they can't have reduced
V-ing perfect
I can't have been reducing you can't have been reducing she can't have been reducing we can't have been reducing you can't have been reducing they can't have been reducing
Interrogative form
Simple form
can I reduce? can you reduce? can she reduce? can we reduce? can you reduce? can they reduce?
V-ing form
can I be reducing? can you be reducing? can she be reducing? can we be reducing? can you be reducing? can they be reducing?
Perfect
can I have reduced? can you have reduced? can she have reduced? can we have reduced? can you have reduced? can they have reduced?
V-ing perfect
can I have been reducing? can you have been reducing? can she have been reducing? can we have been reducing? can you have been reducing? can they have been reducing?
Interro-negative form
Simple form
can't I reduce? can't you reduce? can't she reduce? can't we reduce? can't you reduce? can't they reduce?
V-ing form
can't I be reducing? can't you be reducing? can't she be reducing? can't we be reducing? can't you be reducing? can't they be reducing?
Perfect
can't I have reduced? can't you have reduced? can't she have reduced? can't we have reduced? can't you have reduced? can't they have reduced?
V-ing perfect
can't I have been reducing? can't you have been reducing? can't she have been reducing? can't we have been reducing? can't you have been reducing? can't they have been reducing?