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 cannot reduce you cannot reduce she cannot reduce we cannot reduce you cannot reduce they cannot reduce
V-ing form
I cannot be reducing you cannot be reducing she cannot be reducing we cannot be reducing you cannot be reducing they cannot be reducing
Perfect
I cannot have reduced you cannot have reduced she cannot have reduced we cannot have reduced you cannot have reduced they cannot have reduced
V-ing perfect
I cannot have been reducing you cannot have been reducing she cannot have been reducing we cannot have been reducing you cannot have been reducing they cannot 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 I not reduce? can you not reduce? can she not reduce? can we not reduce? can you not reduce? can they not reduce?
V-ing form
can I not be reducing? can you not be reducing? can she not be reducing? can we not be reducing? can you not be reducing? can they not be reducing?
Perfect
can I not have reduced? can you not have reduced? can she not have reduced? can we not have reduced? can you not have reduced? can they not have reduced?
V-ing perfect
can I not have been reducing? can you not have been reducing? can she not have been reducing? can we not have been reducing? can you not have been reducing? can they not have been reducing?