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 must not sharpen
you must not sharpen
he must not sharpen
we must not sharpen
you must not sharpen
they must not sharpen

V-ing form

I must not be sharpening
you must not be sharpening
he must not be sharpening
we must not be sharpening
you must not be sharpening
they must not be sharpening

Perfect

I must not have sharpened
you must not have sharpened
he must not have sharpened
we must not have sharpened
you must not have sharpened
they must not have sharpened

V-ing perfect

I must not have been sharpening
you must not have been sharpening
he must not have been sharpening
we must not have been sharpening
you must not have been sharpening
they must not 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

must I not sharpen?
must you not sharpen?
must he not sharpen?
must we not sharpen?
must you not sharpen?
must they not sharpen?

V-ing form

must I not be sharpening?
must you not be sharpening?
must he not be sharpening?
must we not be sharpening?
must you not be sharpening?
must they not be sharpening?

Perfect

must I not have sharpened?
must you not have sharpened?
must he not have sharpened?
must we not have sharpened?
must you not have sharpened?
must they not have sharpened?

V-ing perfect

must I not have been sharpening?
must you not have been sharpening?
must he not have been sharpening?
must we not have been sharpening?
must you not have been sharpening?
must they not have been sharpening?

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