Adverbial clauses, like cuando ("when") and aunque ("although"), add more details to sentences and can change their meaning.

Important Grammar Points:

1. Conjugation of Verbs:

   • Preterite: This is for actions that are done. For example: comí means "I ate."
   • Imperfect: This talks about actions that were happening in the past. For example: comía means "I was eating."

2. Subjunctive Mood:

   • This is used for hopes or doubts. For example: Espero que vengas cuando termines means "I hope you come when you finish."

3. Conditional Tense:

   • This explains things that could happen. For example: Si tuviera dinero, viajaría means "If I had money, I would travel."

4. Ser vs. Estar:

   • Ser: This is used for who someone is or for traits that don’t change. For example: Ella es alta means "She is tall."
   • Estar: This is for feelings or conditions that can change. For example: Ella está feliz means "She is happy."

5. Object Pronouns:

   • Indirect: Le dije means "I told him/her."
   • Direct: La vi means "I saw her."

6. Passive Voice:

   • An example is: La casa fue construida which means "The house was built."

7. Reflexive Verbs:

   • These show that someone is doing something to themselves. For example: Me lavo means "I wash myself."

8. Adverbial Clauses:

   • Use cuando to show when something happens: Salí cuando llovió means "I left when it rained."
   • Use aunque to show a contrast: Iré aunque esté cansado means "I will go although I am tired."

9. Agreement of Adjectives:

   • Adjectives must match the noun in gender and number. For example: Los chicos altos means "the tall boys."

10. Interrogative Words:

    • These help you ask questions. For example: ¿Cuándo vienes? means "When are you coming?"

Following these tips will help you create more fun and detailed sentences in Spanish!