PRESENT CONTINUOUS OR PROGRESSIVE

The Present Continuous or Present Progressive tense is used to express actions happening at the same time they are talking, for example:

I am speaking Inglés. I'm speaking English. (It's happening now).

You are reading a book. You're reading a book.

I is studying the lesson. He is studying the lesson.

She is buying a hat. She is buying a hat.

It is raining. It's raining.

We are sleeping. We are sleeping.

You are dancing in the street. You are dancing in the street.

They are walking in the park. They are walking in the park.

This tense is constructed using as auxiliary the Simple Present indicative of the verb TO BE as main verb in the infinitive with the ING termination, as shown below:

It can also be used to refer to situations that happen around the time when we talk, but not exactly have to be at this very moment, for example:

He is working in a bank. He is working in a bank. 
(It means it's his day job, but not necessarily the person should be working now).