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 cannot refer
you cannot refer
he cannot refer
we cannot refer
you cannot refer
they cannot refer

V-ing form

I cannot be referring
you cannot be referring
he cannot be referring
we cannot be referring
you cannot be referring
they cannot be referring

Perfect

I cannot have referred
you cannot have referred
he cannot have referred
we cannot have referred
you cannot have referred
they cannot have referred

V-ing perfect

I cannot have been referring
you cannot have been referring
he cannot have been referring
we cannot have been referring
you cannot have been referring
they cannot 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 I not refer?
can you not refer?
can he not refer?
can we not refer?
can you not refer?
can they not refer?

V-ing form

can I not be referring?
can you not be referring?
can he not be referring?
can we not be referring?
can you not be referring?
can they not be referring?

Perfect

can I not have referred?
can you not have referred?
can he not have referred?
can we not have referred?
can you not have referred?
can they not have referred?

V-ing perfect

can I not have been referring?
can you not have been referring?
can he not have been referring?
can we not have been referring?
can you not have been referring?
can they not have been referring?