English verb conjugation
COULD REDUCE

Regular verb: reduce - reduced - reduced

Affirmation

Simple form	V-ing form
I could reduce you could reduce he could reduce we could reduce you could reduce they could reduce	I could be reducing you could be reducing he could be reducing we could be reducing you could be reducing they could be reducing
Perfect	V-ing perfect
I could have reduced you could have reduced he could have reduced we could have reduced you could have reduced they could have reduced	I could have been reducing you could have been reducing he could have been reducing we could have been reducing you could have been reducing they could have been reducing

Negation

Simple form	V-ing form
I couldn't reduce you couldn't reduce he couldn't reduce we couldn't reduce you couldn't reduce they couldn't reduce	I couldn't be reducing you couldn't be reducing he couldn't be reducing we couldn't be reducing you couldn't be reducing they couldn't be reducing
Perfect	V-ing perfect
I couldn't have reduced you couldn't have reduced he couldn't have reduced we couldn't have reduced you couldn't have reduced they couldn't have reduced	I couldn't have been reducing you couldn't have been reducing he couldn't have been reducing we couldn't have been reducing you couldn't have been reducing they couldn't have been reducing

Interrogative form

Simple form	V-ing form
could I reduce? could you reduce? could he reduce? could we reduce? could you reduce? could they reduce?	could I be reducing? could you be reducing? could he be reducing? could we be reducing? could you be reducing? could they be reducing?
Perfect	V-ing perfect
could I have reduced? could you have reduced? could he have reduced? could we have reduced? could you have reduced? could they have reduced?	could I have been reducing? could you have been reducing? could he have been reducing? could we have been reducing? could you have been reducing? could they have been reducing?

Interro-negative form

Simple form	V-ing form
couldn't I reduce? couldn't you reduce? couldn't he reduce? couldn't we reduce? couldn't you reduce? couldn't they reduce?	couldn't I be reducing? couldn't you be reducing? couldn't he be reducing? couldn't we be reducing? couldn't you be reducing? couldn't they be reducing?
Perfect	V-ing perfect
couldn't I have reduced? couldn't you have reduced? couldn't he have reduced? couldn't we have reduced? couldn't you have reduced? couldn't they have reduced?	couldn't I have been reducing? couldn't you have been reducing? couldn't he have been reducing? couldn't we have been reducing? couldn't you have been reducing? couldn't they have been reducing?