English verb conjugation MUST WHISTLE

Regular verb: whistle - whistled - whistled

Affirmation

Simple form

I must whistle
you must whistle
he must whistle
we must whistle
you must whistle
they must whistle

V-ing form

I must be whistling
you must be whistling
he must be whistling
we must be whistling
you must be whistling
they must be whistling

Perfect

I must have whistled
you must have whistled
he must have whistled
we must have whistled
you must have whistled
they must have whistled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I whistle?
must you whistle?
must he whistle?
must we whistle?
must you whistle?
must they whistle?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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