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