English verb conjugation COULD SLACKEN

Regular verb: slacken - slackened - slackened

Affirmation

Simple form

I could slacken
you could slacken
he could slacken
we could slacken
you could slacken
they could slacken

V-ing form

I could be slackening
you could be slackening
he could be slackening
we could be slackening
you could be slackening
they could be slackening

Perfect

I could have slackened
you could have slackened
he could have slackened
we could have slackened
you could have slackened
they could have slackened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I slacken?
could you slacken?
could he slacken?
could we slacken?
could you slacken?
could they slacken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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