English verb conjugation MUST LABOUR

Regular verb: labour - laboured - laboured

Affirmation

Simple form

I must labour
you must labour
he must labour
we must labour
you must labour
they must labour

V-ing form

I must be labouring
you must be labouring
he must be labouring
we must be labouring
you must be labouring
they must be labouring

Perfect

I must have laboured
you must have laboured
he must have laboured
we must have laboured
you must have laboured
they must have laboured

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I labour?
must you labour?
must he labour?
must we labour?
must you labour?
must they labour?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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