English verb conjugation CAN REFER

Regular verb: refer - referred - referred

Affirmation

Simple form

I can refer
you can refer
he can refer
we can refer
you can refer
they can refer

V-ing form

I can be referring
you can be referring
he can be referring
we can be referring
you can be referring
they can be referring

Perfect

I can have referred
you can have referred
he can have referred
we can have referred
you can have referred
they can have referred

V-ing perfect

I can have been referring
you can have been referring
he can have been referring
we can have been referring
you can have been referring
they can have been referring

Negation

Simple form

I can't refer
you can't refer
he can't refer
we can't refer
you can't refer
they can't refer

V-ing form

I can't be referring
you can't be referring
he can't be referring
we can't be referring
you can't be referring
they can't be referring

Perfect

I can't have referred
you can't have referred
he can't have referred
we can't have referred
you can't have referred
they can't have referred

V-ing perfect

I can't have been referring
you can't have been referring
he can't have been referring
we can't have been referring
you can't have been referring
they can't have been referring

Interrogative form

Simple form

can I refer?
can you refer?
can he refer?
can we refer?
can you refer?
can they refer?

V-ing form

can I be referring?
can you be referring?
can he be referring?
can we be referring?
can you be referring?
can they be referring?

Perfect

can I have referred?
can you have referred?
can he have referred?
can we have referred?
can you have referred?
can they have referred?

V-ing perfect

can I have been referring?
can you have been referring?
can he have been referring?
can we have been referring?
can you have been referring?
can they have been referring?

Interro-negative form

Simple form

can't I refer?
can't you refer?
can't he refer?
can't we refer?
can't you refer?
can't they refer?

V-ing form

can't I be referring?
can't you be referring?
can't he be referring?
can't we be referring?
can't you be referring?
can't they be referring?

Perfect

can't I have referred?
can't you have referred?
can't he have referred?
can't we have referred?
can't you have referred?
can't they have referred?

V-ing perfect

can't I have been referring?
can't you have been referring?
can't he have been referring?
can't we have been referring?
can't you have been referring?
can't they have been referring?

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