English verb conjugation COULD DOUBLE-CHECK

Regular verb: double-check - double-checked - double-checked

Affirmation

Simple form

I could double-check
you could double-check
he could double-check
we could double-check
you could double-check
they could double-check

V-ing form

I could be double-checking
you could be double-checking
he could be double-checking
we could be double-checking
you could be double-checking
they could be double-checking

Perfect

I could have double-checked
you could have double-checked
he could have double-checked
we could have double-checked
you could have double-checked
they could have double-checked

V-ing perfect

I could have been double-checking
you could have been double-checking
he could have been double-checking
we could have been double-checking
you could have been double-checking
they could have been double-checking

Negation

Simple form

I couldn't double-check
you couldn't double-check
he couldn't double-check
we couldn't double-check
you couldn't double-check
they couldn't double-check

V-ing form

I couldn't be double-checking
you couldn't be double-checking
he couldn't be double-checking
we couldn't be double-checking
you couldn't be double-checking
they couldn't be double-checking

Perfect

I couldn't have double-checked
you couldn't have double-checked
he couldn't have double-checked
we couldn't have double-checked
you couldn't have double-checked
they couldn't have double-checked

V-ing perfect

I couldn't have been double-checking
you couldn't have been double-checking
he couldn't have been double-checking
we couldn't have been double-checking
you couldn't have been double-checking
they couldn't have been double-checking

Interrogative form

Simple form

could I double-check?
could you double-check?
could he double-check?
could we double-check?
could you double-check?
could they double-check?

V-ing form

could I be double-checking?
could you be double-checking?
could he be double-checking?
could we be double-checking?
could you be double-checking?
could they be double-checking?

Perfect

could I have double-checked?
could you have double-checked?
could he have double-checked?
could we have double-checked?
could you have double-checked?
could they have double-checked?

V-ing perfect

could I have been double-checking?
could you have been double-checking?
could he have been double-checking?
could we have been double-checking?
could you have been double-checking?
could they have been double-checking?

Interro-negative form

Simple form

couldn't I double-check?
couldn't you double-check?
couldn't he double-check?
couldn't we double-check?
couldn't you double-check?
couldn't they double-check?

V-ing form

couldn't I be double-checking?
couldn't you be double-checking?
couldn't he be double-checking?
couldn't we be double-checking?
couldn't you be double-checking?
couldn't they be double-checking?

Perfect

couldn't I have double-checked?
couldn't you have double-checked?
couldn't he have double-checked?
couldn't we have double-checked?
couldn't you have double-checked?
couldn't they have double-checked?

V-ing perfect

couldn't I have been double-checking?
couldn't you have been double-checking?
couldn't he have been double-checking?
couldn't we have been double-checking?
couldn't you have been double-checking?
couldn't they have been double-checking?

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