English verb conjugation COULD PRECHECK

Regular verb: precheck - prechecked - prechecked

Affirmation

Simple form

I could precheck
you could precheck
she could precheck
we could precheck
you could precheck
they could precheck

V-ing form

I could be prechecking
you could be prechecking
she could be prechecking
we could be prechecking
you could be prechecking
they could be prechecking

Perfect

I could have prechecked
you could have prechecked
she could have prechecked
we could have prechecked
you could have prechecked
they could have prechecked

V-ing perfect

I could have been prechecking
you could have been prechecking
she could have been prechecking
we could have been prechecking
you could have been prechecking
they could have been prechecking

Negation

Simple form

I couldn't precheck
you couldn't precheck
she couldn't precheck
we couldn't precheck
you couldn't precheck
they couldn't precheck

V-ing form

I couldn't be prechecking
you couldn't be prechecking
she couldn't be prechecking
we couldn't be prechecking
you couldn't be prechecking
they couldn't be prechecking

Perfect

I couldn't have prechecked
you couldn't have prechecked
she couldn't have prechecked
we couldn't have prechecked
you couldn't have prechecked
they couldn't have prechecked

V-ing perfect

I couldn't have been prechecking
you couldn't have been prechecking
she couldn't have been prechecking
we couldn't have been prechecking
you couldn't have been prechecking
they couldn't have been prechecking

Interrogative form

Simple form

could I precheck?
could you precheck?
could she precheck?
could we precheck?
could you precheck?
could they precheck?

V-ing form

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

Perfect

could I have prechecked?
could you have prechecked?
could she have prechecked?
could we have prechecked?
could you have prechecked?
could they have prechecked?

V-ing perfect

could I have been prechecking?
could you have been prechecking?
could she have been prechecking?
could we have been prechecking?
could you have been prechecking?
could they have been prechecking?

Interro-negative form

Simple form

couldn't I precheck?
couldn't you precheck?
couldn't she precheck?
couldn't we precheck?
couldn't you precheck?
couldn't they precheck?

V-ing form

couldn't I be prechecking?
couldn't you be prechecking?
couldn't she be prechecking?
couldn't we be prechecking?
couldn't you be prechecking?
couldn't they be prechecking?

Perfect

couldn't I have prechecked?
couldn't you have prechecked?
couldn't she have prechecked?
couldn't we have prechecked?
couldn't you have prechecked?
couldn't they have prechecked?

V-ing perfect

couldn't I have been prechecking?
couldn't you have been prechecking?
couldn't she have been prechecking?
couldn't we have been prechecking?
couldn't you have been prechecking?
couldn't they have been prechecking?

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