English verb conjugation COULD REFER

Regular verb: refer - referred - referred

Affirmation

Simple form

I could refer
you could refer
she could refer
we could refer
you could refer
they could refer

V-ing form

I could be referring
you could be referring
she could be referring
we could be referring
you could be referring
they could be referring

Perfect

I could have referred
you could have referred
she could have referred
we could have referred
you could have referred
they could have referred

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I refer?
could you refer?
could she refer?
could we refer?
could you refer?
could they refer?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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