English verb conjugation MUST SLACKEN

Regular verb: slacken - slackened - slackened

Affirmation

Simple form

I must slacken
you must slacken
he must slacken
we must slacken
you must slacken
they must slacken

V-ing form

I must be slackening
you must be slackening
he must be slackening
we must be slackening
you must be slackening
they must be slackening

Perfect

I must have slackened
you must have slackened
he must have slackened
we must have slackened
you must have slackened
they must have slackened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I slacken?
must you slacken?
must he slacken?
must we slacken?
must you slacken?
must they slacken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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