English verb conjugation COULD DERAIL

Regular verb: derail - derailed - derailed

Affirmation

Simple form

I could derail
you could derail
she could derail
we could derail
you could derail
they could derail

V-ing form

I could be derailing
you could be derailing
she could be derailing
we could be derailing
you could be derailing
they could be derailing

Perfect

I could have derailed
you could have derailed
she 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
she 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
she 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
she 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
she 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
she 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 she derail?
could we derail?
could you derail?
could they derail?

V-ing form

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

Perfect

could I have derailed?
could you have derailed?
could she 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 she 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 she 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 she 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 she 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 she 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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