Understanding how to use Spanish irregular verbs is important for making clear sentences. The three most common irregular verbs are "ser," "estar," and "tener." Let’s take a closer look at how to use them in the present tense.

First, let's talk about the verb "ser," which means "to be." Here’s how you use it:

• Yo soy (I am)
• Tú eres (You are, informal)
• Él/Ella/Usted es (He/She/You, formal)
• Nosotros/as somos (We are)
• Vosotros/as sois (You all are, informal, used in Spain)
• Ellos/Ellas/Ustedes son (They/You all are)

Next, we have "estar," which also means "to be." Here’s how it is used:

• Yo estoy (I am)
• Tú estás (You are, informal)
• Él/Ella/Usted está (He/She/You, formal)
• Nosotros/as estamos (We are)
• Vosotros/as estáis (You all are, informal, used in Spain)
• Ellos/Ellas/Ustedes están (They/You all are)

Now, let's look at "tener," which means "to have." Here are its forms:

• Yo tengo (I have)
• Tú tienes (You have, informal)
• Él/Ella/Usted tiene (He/She/You, formal)
• Nosotros/as tenemos (We have)
• Vosotros/as tenéis (You all have, informal, used in Spain)
• Ellos/Ellas/Ustedes tienen (They/You all have)

When you want to ask simple questions in Spanish, remember to put the verb before the subject. For example:

• "¿Qué es esto?" (What is this?)
• "¿Dónde estás?" (Where are you?)

To make negative sentences, just add "no" before the verb. For instance:

• "No tengo" means "I do not have."

Finally, remember that articles go before nouns. Use "el" for masculine nouns and "la" for feminine nouns. For example:

• "el libro" (the book)
• "la casa" (the house)

With these conjugations and rules, you’ll have a good start on your Spanish speaking skills!