To use the irregular verb "ser" in the present tense, you need to remember its special forms. Here they are:

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

Important Grammar Points

1. Subject Pronouns:

   • Yo (I)
   • Tú (You)
   • Él/Ella (He/She)
   • Nosotros (We)
   • Vosotros (You all)
   • Ellos (They)

2. Matching Adjectives and Nouns:

   • Example:
     • El libro es interesante. (The book is interesting.)
     • Las chicas son inteligentes. (The girls are smart.)

3. How to Ask Simple Questions:

   • Use question words like:
     • ¿Qué? (What?)
     • ¿Quién? (Who?)
     • ¿Cómo? (How?)
   • Structure:
     • ¿Qué eres tú? (What are you?)
   • Answer:
     • Yo soy estudiante. (I am a student.)