<h2>1. estoy</h2>
<em>Yo </em><em>estoy</em><em> en la universidad</em>
Estoy is the conjugation of the verb estar for the first person singular in the simple present. We use the verb estar to indicate temporary states and locations. In this way, this verb stands for<em> position, location, action, condition, and emotion</em>. Here in this sentence, this verb stands for <em>location,</em> describing that I'm temporarily at the university.
<h2 /><h2>2. es</h2>
<em>La clase de anatomía </em><em>es</em><em> de cinco a siete</em>
Es is the conjugation of the verb ser for the third person singular in the simple present. It is important to say that the simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. On the other hand, we use the verb ser to talk about permanent or lasting attributes. In this way, this verb stands for <em>descriptions, occupations, characteristics, time, origin and relationships. </em>Here we use this verb as <em>time, </em>referring that a class will take place at a certain moment.
<h2>3. vienen</h2>
<em>Mi hermano y su esposa </em><em>vienen</em><em> a cenar esta noche. </em>
Vienen is the conjugation of the verb venir for the third person plural in the simple present. It is important to say since we didn't mention above that the simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. So in this sentence, the simple present stands for something that will happen in the near future being tonight this point.
<h2>4. corro</h2>
<em> A las siete yo corro al supermercado</em>
Corro is the conjugation of the verb correr for the first person singular in the simple present. Here in this sentence, the simple present also stands for something that will happen in the near future. Thus, I am going to the supermarket at seven o'clock
<h2>5. tienes</h2>
<em>Tú tienes que regresar a casa antes de las siete</em>
Tienes is the conjugation of the verb tener for the second person singular in the simple present. This is an important Spanish verb and means <em>to possess, own, or hold</em>. So in this sentence, you have to come back home before seven o'clock. So, it is obvious that the translation of this sentence would be:
<em>- You </em><em>have to </em><em>come back home before seven o'clock</em>
or
- <em>You</em><em> must</em><em> come back home before seven o'clock</em>
