English verb conjugation COULD BACKCHECK

Regular verb: backcheck - backchecked - backchecked

Affirmation

Simple form

I could backcheck
you could backcheck
she could backcheck
we could backcheck
you could backcheck
they could backcheck

V-ing form

I could be backchecking
you could be backchecking
she could be backchecking
we could be backchecking
you could be backchecking
they could be backchecking

Perfect

I could have backchecked
you could have backchecked
she 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
she 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
she 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
she 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
she 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
she 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 she backcheck?
could we backcheck?
could you backcheck?
could they backcheck?

V-ing form

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

Perfect

could I have backchecked?
could you have backchecked?
could she 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 she 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 she 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 she 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 she 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 she 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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