English verb conjugation COULD BACKCHECK

Regular verb: backcheck - backchecked - backchecked

Affirmation

Simple form

I could backcheck
you could backcheck
he could backcheck
we could backcheck
you could backcheck
they could backcheck

V-ing form

I could be backchecking
you could be backchecking
he could be backchecking
we could be backchecking
you could be backchecking
they could be backchecking

Perfect

I could have backchecked
you could have backchecked
he could have backchecked
we could have backchecked
you could have backchecked
they could have backchecked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I backcheck?
could you backcheck?
could he backcheck?
could we backcheck?
could you backcheck?
could they backcheck?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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