English verb conjugation COULD EXCAVATE

Regular verb: excavate - excavated - excavated

Affirmation

Simple form

I could excavate
you could excavate
he could excavate
we could excavate
you could excavate
they could excavate

V-ing form

I could be excavating
you could be excavating
he could be excavating
we could be excavating
you could be excavating
they could be excavating

Perfect

I could have excavated
you could have excavated
he could have excavated
we could have excavated
you could have excavated
they could have excavated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I excavate?
could you excavate?
could he excavate?
could we excavate?
could you excavate?
could they excavate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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