Какой вспомогательный глагол в present continuous?

В Present Continuous вспомогательный глагол" to be"-имеет три формы:

1 лицо. ед. ч - am

3 лицо ед ч. - is

в остальных случаях - are

Н-р:

I am a student. (1 л. ед. ч.)

He (she, it) is a student. (3 л. ед. ч.)

We, (you, they) are students.

I AM

he/she/it IS

We/they/you ARE