English verb conjugation MUST KNIFE

Regular verb: knife - knifed - knifed

Affirmation

Simple form

I must knife
you must knife
he must knife
we must knife
you must knife
they must knife

V-ing form

I must be knifing
you must be knifing
he must be knifing
we must be knifing
you must be knifing
they must be knifing

Perfect

I must have knifed
you must have knifed
he must have knifed
we must have knifed
you must have knifed
they must have knifed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I knife?
must you knife?
must he knife?
must we knife?
must you knife?
must they knife?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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