English verb conjugation
MUST INTERGRADE

Regular verb: intergrade - intergraded - intergraded

Affirmation

Simple form	V-ing form
I must intergrade you must intergrade he must intergrade we must intergrade you must intergrade they must intergrade	I must be intergrading you must be intergrading he must be intergrading we must be intergrading you must be intergrading they must be intergrading
Perfect	V-ing perfect
I must have intergraded you must have intergraded he must have intergraded we must have intergraded you must have intergraded they must have intergraded	I must have been intergrading you must have been intergrading he must have been intergrading we must have been intergrading you must have been intergrading they must have been intergrading

Negation

Simple form	V-ing form
I mustn't intergrade you mustn't intergrade he mustn't intergrade we mustn't intergrade you mustn't intergrade they mustn't intergrade	I mustn't be intergrading you mustn't be intergrading he mustn't be intergrading we mustn't be intergrading you mustn't be intergrading they mustn't be intergrading
Perfect	V-ing perfect
I mustn't have intergraded you mustn't have intergraded he mustn't have intergraded we mustn't have intergraded you mustn't have intergraded they mustn't have intergraded	I mustn't have been intergrading you mustn't have been intergrading he mustn't have been intergrading we mustn't have been intergrading you mustn't have been intergrading they mustn't have been intergrading

Interrogative form

Simple form	V-ing form
must I intergrade? must you intergrade? must he intergrade? must we intergrade? must you intergrade? must they intergrade?	must I be intergrading? must you be intergrading? must he be intergrading? must we be intergrading? must you be intergrading? must they be intergrading?
Perfect	V-ing perfect
must I have intergraded? must you have intergraded? must he have intergraded? must we have intergraded? must you have intergraded? must they have intergraded?	must I have been intergrading? must you have been intergrading? must he have been intergrading? must we have been intergrading? must you have been intergrading? must they have been intergrading?

Interro-negative form

Simple form	V-ing form
mustn't I intergrade? mustn't you intergrade? mustn't he intergrade? mustn't we intergrade? mustn't you intergrade? mustn't they intergrade?	mustn't I be intergrading? mustn't you be intergrading? mustn't he be intergrading? mustn't we be intergrading? mustn't you be intergrading? mustn't they be intergrading?
Perfect	V-ing perfect
mustn't I have intergraded? mustn't you have intergraded? mustn't he have intergraded? mustn't we have intergraded? mustn't you have intergraded? mustn't they have intergraded?	mustn't I have been intergrading? mustn't you have been intergrading? mustn't he have been intergrading? mustn't we have been intergrading? mustn't you have been intergrading? mustn't they have been intergrading?