English verb conjugation COULD UNDERMINE

Regular verb: undermine - undermined - undermined

Affirmation

Simple form

I could undermine
you could undermine
he could undermine
we could undermine
you could undermine
they could undermine

V-ing form

I could be undermining
you could be undermining
he could be undermining
we could be undermining
you could be undermining
they could be undermining

Perfect

I could have undermined
you could have undermined
he could have undermined
we could have undermined
you could have undermined
they could have undermined

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I undermine?
could you undermine?
could he undermine?
could we undermine?
could you undermine?
could they undermine?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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