English verb conjugation COULD DERAIL

Regular verb: derail - derailed - derailed

Affirmation

Simple form

I could derail
you could derail
he could derail
we could derail
you could derail
they could derail

V-ing form

I could be derailing
you could be derailing
he could be derailing
we could be derailing
you could be derailing
they could be derailing

Perfect

I could have derailed
you could have derailed
he could have derailed
we could have derailed
you could have derailed
they could have derailed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I derail?
could you derail?
could he derail?
could we derail?
could you derail?
could they derail?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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