Question

What is the REGULAR ending for an -ar verb in the "usted" form?

Answer 1

The regular ending is just "a."

I'll show you some examples of AR verbs, and their "usted" forms, in present tense.

1. Hablar

Usted: Habla

2. Nadar

Usted: Nada

3. Sacar

Usted: Saca

Answer 2

Usted is the same as the third person in Spanish. It is equivalent to el and ella

Answer 3

Usted isn't exactly the same as el y ella. It can be used as a more general you without gender. You talk to me. Usted me habla. She talks to me. Ella me habla, etc.

Answer 4

It has different meaning - "you", correct. What I meant to say is that it is on the same level as el and ella in terms of 3rd person. I was unclear.