English verb conjugation MUST UNDERPERFORM

Regular verb: underperform - underperformed - underperformed

Affirmation

Simple form

I must underperform
you must underperform
she must underperform
we must underperform
you must underperform
they must underperform

V-ing form

I must be underperforming
you must be underperforming
she must be underperforming
we must be underperforming
you must be underperforming
they must be underperforming

Perfect

I must have underperformed
you must have underperformed
she must have underperformed
we must have underperformed
you must have underperformed
they must have underperformed

V-ing perfect

I must have been underperforming
you must have been underperforming
she must have been underperforming
we must have been underperforming
you must have been underperforming
they must have been underperforming

Negation

Simple form

I mustn't underperform
you mustn't underperform
she mustn't underperform
we mustn't underperform
you mustn't underperform
they mustn't underperform

V-ing form

I mustn't be underperforming
you mustn't be underperforming
she mustn't be underperforming
we mustn't be underperforming
you mustn't be underperforming
they mustn't be underperforming

Perfect

I mustn't have underperformed
you mustn't have underperformed
she mustn't have underperformed
we mustn't have underperformed
you mustn't have underperformed
they mustn't have underperformed

V-ing perfect

I mustn't have been underperforming
you mustn't have been underperforming
she mustn't have been underperforming
we mustn't have been underperforming
you mustn't have been underperforming
they mustn't have been underperforming

Interrogative form

Simple form

must I underperform?
must you underperform?
must she underperform?
must we underperform?
must you underperform?
must they underperform?

V-ing form

must I be underperforming?
must you be underperforming?
must she be underperforming?
must we be underperforming?
must you be underperforming?
must they be underperforming?

Perfect

must I have underperformed?
must you have underperformed?
must she have underperformed?
must we have underperformed?
must you have underperformed?
must they have underperformed?

V-ing perfect

must I have been underperforming?
must you have been underperforming?
must she have been underperforming?
must we have been underperforming?
must you have been underperforming?
must they have been underperforming?

Interro-negative form

Simple form

mustn't I underperform?
mustn't you underperform?
mustn't she underperform?
mustn't we underperform?
mustn't you underperform?
mustn't they underperform?

V-ing form

mustn't I be underperforming?
mustn't you be underperforming?
mustn't she be underperforming?
mustn't we be underperforming?
mustn't you be underperforming?
mustn't they be underperforming?

Perfect

mustn't I have underperformed?
mustn't you have underperformed?
mustn't she have underperformed?
mustn't we have underperformed?
mustn't you have underperformed?
mustn't they have underperformed?

V-ing perfect

mustn't I have been underperforming?
mustn't you have been underperforming?
mustn't she have been underperforming?
mustn't we have been underperforming?
mustn't you have been underperforming?
mustn't they have been underperforming?

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