English verb conjugation MUST FROST

Regular verb: frost - frosted - frosted

Affirmation

Simple form

I must frost
you must frost
she must frost
we must frost
you must frost
they must frost

V-ing form

I must be frosting
you must be frosting
she must be frosting
we must be frosting
you must be frosting
they must be frosting

Perfect

I must have frosted
you must have frosted
she must have frosted
we must have frosted
you must have frosted
they must have frosted

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I frost?
must you frost?
must she frost?
must we frost?
must you frost?
must they frost?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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