English verb conjugation COULD MYSTIFY

Regular verb: mystify - mystified - mystified

Affirmation

Simple form

I could mystify
you could mystify
she could mystify
we could mystify
you could mystify
they could mystify

V-ing form

I could be mystifying
you could be mystifying
she could be mystifying
we could be mystifying
you could be mystifying
they could be mystifying

Perfect

I could have mystified
you could have mystified
she could have mystified
we could have mystified
you could have mystified
they could have mystified

V-ing perfect

I could have been mystifying
you could have been mystifying
she could have been mystifying
we could have been mystifying
you could have been mystifying
they could have been mystifying

Negation

Simple form

I couldn't mystify
you couldn't mystify
she couldn't mystify
we couldn't mystify
you couldn't mystify
they couldn't mystify

V-ing form

I couldn't be mystifying
you couldn't be mystifying
she couldn't be mystifying
we couldn't be mystifying
you couldn't be mystifying
they couldn't be mystifying

Perfect

I couldn't have mystified
you couldn't have mystified
she couldn't have mystified
we couldn't have mystified
you couldn't have mystified
they couldn't have mystified

V-ing perfect

I couldn't have been mystifying
you couldn't have been mystifying
she couldn't have been mystifying
we couldn't have been mystifying
you couldn't have been mystifying
they couldn't have been mystifying

Interrogative form

Simple form

could I mystify?
could you mystify?
could she mystify?
could we mystify?
could you mystify?
could they mystify?

V-ing form

could I be mystifying?
could you be mystifying?
could she be mystifying?
could we be mystifying?
could you be mystifying?
could they be mystifying?

Perfect

could I have mystified?
could you have mystified?
could she have mystified?
could we have mystified?
could you have mystified?
could they have mystified?

V-ing perfect

could I have been mystifying?
could you have been mystifying?
could she have been mystifying?
could we have been mystifying?
could you have been mystifying?
could they have been mystifying?

Interro-negative form

Simple form

couldn't I mystify?
couldn't you mystify?
couldn't she mystify?
couldn't we mystify?
couldn't you mystify?
couldn't they mystify?

V-ing form

couldn't I be mystifying?
couldn't you be mystifying?
couldn't she be mystifying?
couldn't we be mystifying?
couldn't you be mystifying?
couldn't they be mystifying?

Perfect

couldn't I have mystified?
couldn't you have mystified?
couldn't she have mystified?
couldn't we have mystified?
couldn't you have mystified?
couldn't they have mystified?

V-ing perfect

couldn't I have been mystifying?
couldn't you have been mystifying?
couldn't she have been mystifying?
couldn't we have been mystifying?
couldn't you have been mystifying?
couldn't they have been mystifying?

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