English verb conjugation MUST PLUMB

Regular verb: plumb - plumbed - plumbed

Affirmation

Simple form

I must plumb
you must plumb
he must plumb
we must plumb
you must plumb
they must plumb

V-ing form

I must be plumbing
you must be plumbing
he must be plumbing
we must be plumbing
you must be plumbing
they must be plumbing

Perfect

I must have plumbed
you must have plumbed
he must have plumbed
we must have plumbed
you must have plumbed
they must have plumbed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I plumb?
must you plumb?
must he plumb?
must we plumb?
must you plumb?
must they plumb?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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