English verb conjugation MUST UNDERPROP

Regular verb: underprop - underproped - underproped

Affirmation

Simple form

I must underprop
you must underprop
he must underprop
we must underprop
you must underprop
they must underprop

V-ing form

I must be underproping
you must be underproping
he must be underproping
we must be underproping
you must be underproping
they must be underproping

Perfect

I must have underproped
you must have underproped
he must have underproped
we must have underproped
you must have underproped
they must have underproped

V-ing perfect

I must have been underproping
you must have been underproping
he must have been underproping
we must have been underproping
you must have been underproping
they must have been underproping

Negation

Simple form

I mustn't underprop
you mustn't underprop
he mustn't underprop
we mustn't underprop
you mustn't underprop
they mustn't underprop

V-ing form

I mustn't be underproping
you mustn't be underproping
he mustn't be underproping
we mustn't be underproping
you mustn't be underproping
they mustn't be underproping

Perfect

I mustn't have underproped
you mustn't have underproped
he mustn't have underproped
we mustn't have underproped
you mustn't have underproped
they mustn't have underproped

V-ing perfect

I mustn't have been underproping
you mustn't have been underproping
he mustn't have been underproping
we mustn't have been underproping
you mustn't have been underproping
they mustn't have been underproping

Interrogative form

Simple form

must I underprop?
must you underprop?
must he underprop?
must we underprop?
must you underprop?
must they underprop?

V-ing form

must I be underproping?
must you be underproping?
must he be underproping?
must we be underproping?
must you be underproping?
must they be underproping?

Perfect

must I have underproped?
must you have underproped?
must he have underproped?
must we have underproped?
must you have underproped?
must they have underproped?

V-ing perfect

must I have been underproping?
must you have been underproping?
must he have been underproping?
must we have been underproping?
must you have been underproping?
must they have been underproping?

Interro-negative form

Simple form

mustn't I underprop?
mustn't you underprop?
mustn't he underprop?
mustn't we underprop?
mustn't you underprop?
mustn't they underprop?

V-ing form

mustn't I be underproping?
mustn't you be underproping?
mustn't he be underproping?
mustn't we be underproping?
mustn't you be underproping?
mustn't they be underproping?

Perfect

mustn't I have underproped?
mustn't you have underproped?
mustn't he have underproped?
mustn't we have underproped?
mustn't you have underproped?
mustn't they have underproped?

V-ing perfect

mustn't I have been underproping?
mustn't you have been underproping?
mustn't he have been underproping?
mustn't we have been underproping?
mustn't you have been underproping?
mustn't they have been underproping?

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