English verb conjugation MUST DUCK

Regular verb: duck - ducked - ducked

Affirmation

Simple form

I must duck
you must duck
he must duck
we must duck
you must duck
they must duck

V-ing form

I must be ducking
you must be ducking
he must be ducking
we must be ducking
you must be ducking
they must be ducking

Perfect

I must have ducked
you must have ducked
he must have ducked
we must have ducked
you must have ducked
they must have ducked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I duck?
must you duck?
must he duck?
must we duck?
must you duck?
must they duck?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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