English verb conjugation MUST SING SING

Regular verb: sing sing - sing singed - sing singed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I must sing sing
you must sing sing
she must sing sing
we must sing sing
you must sing sing
they must sing sing

V-ing form

I must be sing singing
you must be sing singing
she must be sing singing
we must be sing singing
you must be sing singing
they must be sing singing

Perfect

I must have sing singed
you must have sing singed
she must have sing singed
we must have sing singed
you must have sing singed
they must have sing singed

V-ing perfect

I must have been sing singing
you must have been sing singing
she must have been sing singing
we must have been sing singing
you must have been sing singing
they must have been sing singing

Negation

Simple form

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

V-ing form

I mustn't be sing singing
you mustn't be sing singing
she mustn't be sing singing
we mustn't be sing singing
you mustn't be sing singing
they mustn't be sing singing

Perfect

I mustn't have sing singed
you mustn't have sing singed
she mustn't have sing singed
we mustn't have sing singed
you mustn't have sing singed
they mustn't have sing singed

V-ing perfect

I mustn't have been sing singing
you mustn't have been sing singing
she mustn't have been sing singing
we mustn't have been sing singing
you mustn't have been sing singing
they mustn't have been sing singing

Interrogative form

Simple form

must I sing sing?
must you sing sing?
must she sing sing?
must we sing sing?
must you sing sing?
must they sing sing?

V-ing form

must I be sing singing?
must you be sing singing?
must she be sing singing?
must we be sing singing?
must you be sing singing?
must they be sing singing?

Perfect

must I have sing singed?
must you have sing singed?
must she have sing singed?
must we have sing singed?
must you have sing singed?
must they have sing singed?

V-ing perfect

must I have been sing singing?
must you have been sing singing?
must she have been sing singing?
must we have been sing singing?
must you have been sing singing?
must they have been sing singing?

Interro-negative form

Simple form

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

V-ing form

mustn't I be sing singing?
mustn't you be sing singing?
mustn't she be sing singing?
mustn't we be sing singing?
mustn't you be sing singing?
mustn't they be sing singing?

Perfect

mustn't I have sing singed?
mustn't you have sing singed?
mustn't she have sing singed?
mustn't we have sing singed?
mustn't you have sing singed?
mustn't they have sing singed?

V-ing perfect

mustn't I have been sing singing?
mustn't you have been sing singing?
mustn't she have been sing singing?
mustn't we have been sing singing?
mustn't you have been sing singing?
mustn't they have been sing singing?

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