English verb conjugation MUST UNDERLIE

Irregular verb: underlie - underlay - underlain

Affirmation

Simple form

I must underlie
you must underlie
he must underlie
we must underlie
you must underlie
they must underlie

V-ing form

I must be underlying
you must be underlying
he must be underlying
we must be underlying
you must be underlying
they must be underlying

Perfect

I must have underlain
you must have underlain
he must have underlain
we must have underlain
you must have underlain
they must have underlain

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I underlie?
must you underlie?
must he underlie?
must we underlie?
must you underlie?
must they underlie?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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