English verb conjugation MUST SHARPEN

Regular verb: sharpen - sharpened - sharpened

Affirmation

Simple form

I must sharpen
you must sharpen
he must sharpen
we must sharpen
you must sharpen
they must sharpen

V-ing form

I must be sharpening
you must be sharpening
he must be sharpening
we must be sharpening
you must be sharpening
they must be sharpening

Perfect

I must have sharpened
you must have sharpened
he must have sharpened
we must have sharpened
you must have sharpened
they must have sharpened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sharpen?
must you sharpen?
must he sharpen?
must we sharpen?
must you sharpen?
must they sharpen?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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