Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may unwash you may unwash he may unwash we may unwash you may unwash they may unwash
V-ing form
I may be unwashing you may be unwashing he may be unwashing we may be unwashing you may be unwashing they may be unwashing
Perfect
I may have unwashed you may have unwashed he may have unwashed we may have unwashed you may have unwashed they may have unwashed
V-ing perfect
I may have been unwashing you may have been unwashing he may have been unwashing we may have been unwashing you may have been unwashing they may have been unwashing
Negation
Simple form
I mayn't unwash you mayn't unwash he mayn't unwash we mayn't unwash you mayn't unwash they mayn't unwash
V-ing form
I mayn't be unwashing you mayn't be unwashing he mayn't be unwashing we mayn't be unwashing you mayn't be unwashing they mayn't be unwashing
Perfect
I mayn't have unwashed you mayn't have unwashed he mayn't have unwashed we mayn't have unwashed you mayn't have unwashed they mayn't have unwashed
V-ing perfect
I mayn't have been unwashing you mayn't have been unwashing he mayn't have been unwashing we mayn't have been unwashing you mayn't have been unwashing they mayn't have been unwashing
Interrogative form
Simple form
may I unwash? may you unwash? may he unwash? may we unwash? may you unwash? may they unwash?
V-ing form
may I be unwashing? may you be unwashing? may he be unwashing? may we be unwashing? may you be unwashing? may they be unwashing?
Perfect
may I have unwashed? may you have unwashed? may he have unwashed? may we have unwashed? may you have unwashed? may they have unwashed?
V-ing perfect
may I have been unwashing? may you have been unwashing? may he have been unwashing? may we have been unwashing? may you have been unwashing? may they have been unwashing?
Interro-negative form
Simple form
mayn't I unwash? mayn't you unwash? mayn't he unwash? mayn't we unwash? mayn't you unwash? mayn't they unwash?
V-ing form
mayn't I be unwashing? mayn't you be unwashing? mayn't he be unwashing? mayn't we be unwashing? mayn't you be unwashing? mayn't they be unwashing?
Perfect
mayn't I have unwashed? mayn't you have unwashed? mayn't he have unwashed? mayn't we have unwashed? mayn't you have unwashed? mayn't they have unwashed?
V-ing perfect
mayn't I have been unwashing? mayn't you have been unwashing? mayn't he have been unwashing? mayn't we have been unwashing? mayn't you have been unwashing? mayn't they have been unwashing?