English verb conjugation
MUST DESTAIN

Regular verb: destain - destained - destained

Affirmation

Simple form	V-ing form
I must destain you must destain he must destain we must destain you must destain they must destain	I must be destaining you must be destaining he must be destaining we must be destaining you must be destaining they must be destaining
Perfect	V-ing perfect
I must have destained you must have destained he must have destained we must have destained you must have destained they must have destained	I must have been destaining you must have been destaining he must have been destaining we must have been destaining you must have been destaining they must have been destaining

Negation

Simple form	V-ing form
I mustn't destain you mustn't destain he mustn't destain we mustn't destain you mustn't destain they mustn't destain	I mustn't be destaining you mustn't be destaining he mustn't be destaining we mustn't be destaining you mustn't be destaining they mustn't be destaining
Perfect	V-ing perfect
I mustn't have destained you mustn't have destained he mustn't have destained we mustn't have destained you mustn't have destained they mustn't have destained	I mustn't have been destaining you mustn't have been destaining he mustn't have been destaining we mustn't have been destaining you mustn't have been destaining they mustn't have been destaining

Interrogative form

Simple form	V-ing form
must I destain? must you destain? must he destain? must we destain? must you destain? must they destain?	must I be destaining? must you be destaining? must he be destaining? must we be destaining? must you be destaining? must they be destaining?
Perfect	V-ing perfect
must I have destained? must you have destained? must he have destained? must we have destained? must you have destained? must they have destained?	must I have been destaining? must you have been destaining? must he have been destaining? must we have been destaining? must you have been destaining? must they have been destaining?

Interro-negative form

Simple form	V-ing form
mustn't I destain? mustn't you destain? mustn't he destain? mustn't we destain? mustn't you destain? mustn't they destain?	mustn't I be destaining? mustn't you be destaining? mustn't he be destaining? mustn't we be destaining? mustn't you be destaining? mustn't they be destaining?
Perfect	V-ing perfect
mustn't I have destained? mustn't you have destained? mustn't he have destained? mustn't we have destained? mustn't you have destained? mustn't they have destained?	mustn't I have been destaining? mustn't you have been destaining? mustn't he have been destaining? mustn't we have been destaining? mustn't you have been destaining? mustn't they have been destaining?