English verb conjugation MUST NIGGLE

Regular verb: niggle - niggled - niggled

Affirmation

Simple form

I must niggle
you must niggle
he must niggle
we must niggle
you must niggle
they must niggle

V-ing form

I must be niggling
you must be niggling
he must be niggling
we must be niggling
you must be niggling
they must be niggling

Perfect

I must have niggled
you must have niggled
he must have niggled
we must have niggled
you must have niggled
they must have niggled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I niggle?
must you niggle?
must he niggle?
must we niggle?
must you niggle?
must they niggle?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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