Costar Spanish Conjugation

Do you struggle with conjugating the Spanish verb ‘costar’? Don’t worry, we’ve got you covered!

In this article, we’ll guide you through the ins and outs of ‘costar’ conjugation. From regular forms to irregular ones, we’ll break it down for you, step by step.

Whether you’re a beginner or looking to perfect your conjugation skills, this article is designed to provide you with a clear and comprehensive understanding of ‘costar’ in action.

Let’s dive in!

Key Takeaways

  • Regular conjugation of ‘costar’ in the present tense requires changing the stem vowel. Examples include ‘cuesto’ for ‘I cost,’ ‘cuestas’ for ‘you cost,’ and ‘cuesta’ for ‘he/she/it costs.’
  • The most common mistake with irregular forms of ‘costar’ is forgetting to change the ‘o’ in the stem to ‘ue’ in the present tense. Examples include ‘yo cuesto’ for ‘I cost’ and ‘tú cuestas’ for ‘you cost.’
  • When using ‘costar’ in different contexts, it can refer to prices (‘El libro cuesta diez euros’), effort (‘Me cuesta trabajo estudiar’), and expressing opinions (‘Me cuesta creerlo’).
  • In the past tense, the conjugation of ‘costar’ changes slightly. Common mistakes include forgetting to change the stem vowel ‘o’ to ‘u’ in the third person singular and plural forms and using the regular -ar verb endings instead of the correct -er verb endings.

Regular Conjugation of ‘Costar

You’re going to costar in the play, so make sure you practice your lines.

Conjugating the verb ‘costar’ may seem tricky at first, but with practice, it will become easier. One common mistake in conjugating ‘costar’ is forgetting to change the stem vowel in the present tense.

The correct conjugation for ‘costar’ in the present tense is ‘cuesto’ for ‘I cost,’ ‘cuestas’ for ‘you cost,’ ‘cuesta’ for ‘he/she/it costs,’ and so on.

To practice conjugating ‘costar,’ try these exercises:

1) Write out the conjugations for each subject pronoun in the present tense.
2) Create sentences using different subject pronouns and the correct conjugation of ‘costar.’

Irregular Forms of ‘Costar

Don’t forget to memorize the irregular forms of ‘costar’ for the quiz tomorrow.

While regular conjugations follow a predictable pattern, irregular verbs like ‘costar’ require some extra attention.

The most common mistake when conjugating ‘costar’ is forgetting to change the ‘o’ in the stem to ‘ue’ in the present tense. For example, instead of saying ‘yo costar,’ you should say ‘yo cuesto.’

Another mistake is failing to use the correct form of ‘costar’ when talking about different people or things. Each subject pronoun requires a specific conjugation, such as ‘tú cuestas’ for ‘you cost’ or ‘ellos cuestan’ for ‘they cost.’

Conjugation of ‘Costar’ in Present Tense

During the present tense, you can use the coordinating conjunction ‘y’ to connect the subject pronoun ‘tú’ with the conjugated form of ‘costar,’ such as ‘tú cuestas’ meaning ‘you cost.’

Here are some common mistakes to avoid when conjugating ‘costar’ in the present tense:

  1. Forgetting to add the accent mark: The correct form is ‘cuestas,’ not ‘cuestas.’

  2. Using the wrong ending: Remember that ‘costar’ is an -ar verb, so the endings for ‘tú’ are -as, not -es.

  3. Mixing up the conjugation with other verbs: Each verb has its own conjugation rules, so be careful not to confuse ‘costar’ with other verbs like ‘gastar’ or ‘pagar.’

  4. Not agreeing with the subject: ‘Costar’ is a verb that agrees with the subject, so make sure to use the correct form depending on whether the subject is singular or plural.

Now let’s explore how to use ‘costar’ in different contexts.

When talking about prices, we can say ‘El libro cuesta diez euros’ (The book costs ten euros).

When discussing effort, we can say ‘Me cuesta trabajo estudiar’ (It’s hard for me to study).

Finally, when expressing opinions, we can say ‘Me cuesta creerlo’ (It’s hard for me to believe it).

Conjugation of ‘Costar’ in Past Tense

Your costar in the play was amazing!

Now, let’s talk about the conjugation of ‘costar’ in the past tense. In Spanish, ‘costar’ means ‘to cost’ and it’s a stem-changing verb.

In the preterite tense, the conjugation of ‘costar’ changes slightly. Instead of saying ‘costé’, ‘costaste’, ‘costó’, ‘costamos’, ‘costasteis’, and ‘costaron’ like regular -ar verbs, we use ‘costé’, ‘costaste’, ‘costó’, ‘costamos’, ‘costasteis’, and ‘costaron’. The stem vowel ‘o’ changes to ‘u’ in the third person singular and plural forms.

However, there are some common mistakes that people make when conjugating ‘costar’ in the past tense. One mistake is forgetting to change the stem vowel ‘o’ to ‘u’ in the third person singular and plural forms. Another mistake is using the regular -ar verb endings instead of the correct -er verb endings.

Remember to pay attention to these details when conjugating ‘costar’ in the past tense.

Tips for Mastering the Conjugation of ‘Costar

You can easily improve your Spanish skills by practicing with different resources and learning tips for mastering the conjugation of ‘costar’. Here are some strategies and common mistakes to avoid when conjugating ‘costar’:

  1. Understand the stem change: The stem of ‘costar’ changes from ‘o’ to ‘ue’ in the present tense, second and third person singular forms. For example, ‘cuesto’ (I cost) and ‘cuesta’ (he/she costs).

  2. Memorize the irregular forms: ‘Costar’ has irregular forms in the present subjunctive and imperative. It’s important to memorize these forms to use them correctly in sentences.

  3. Practice with sentence examples: Create your own sentences using ‘costar’ to reinforce the conjugation rules. This will help you become more comfortable and confident in using the verb correctly.

  4. Use flashcards or mnemonic devices: Create flashcards or use mnemonic devices to help you remember the different conjugations of ‘costar’. This can make memorization easier and more effective.

Frequently Asked Questions

What Is the Origin of the Verb ‘Costar’?

The verb ‘costar’ originated from Latin and means "to cost". In Spanish, it is used to talk about the price or difficulty of something. Similar verbs in other languages include ‘coûter’ in French and ‘costare’ in Italian.

Is ‘Costar’ Used in Any Idiomatic Expressions in Spanish?

‘Costar’ is used in different tenses to express the difficulty or effort required to obtain or achieve something. In idiomatic expressions, it is commonly used to mean ‘to be difficult’ or ‘to be a challenge’.

Are There Any Regional Variations in the Conjugation of ‘Costar’?

Regional variations in Spanish verb conjugations are common, including with "costar." Different regions may have their own unique conjugation patterns. Additionally, the meaning of "costar" can vary in different regions, adding to the complexity.

Can ‘Costar’ Be Used Reflexively?

Can ‘costar’ be used reflexively? Yes, it can! When you add the reflexive pronoun ‘se’ to ‘costar’, it changes the meaning to ‘to cost oneself’. So, you’re not just talking about the cost, but also the effort or sacrifice involved.

Are There Any Common Mistakes to Avoid When Conjugating ‘Costar’?

When conjugating ‘costar’, it’s important to avoid common errors like incorrect use of the past participle and confusing it with ‘gustar’. To master its conjugation, learn tips for different tenses and moods.


Mastering the conjugation of ‘costar’ in Spanish can be a challenging yet rewarding endeavor. By understanding the regular and irregular forms, as well as the conjugation in present and past tenses, one can confidently navigate conversations and express themselves effectively.

With practice and dedication, the intricacies of ‘costar’ conjugation can become second nature, allowing for a deeper connection with the Spanish language and culture.

Embrace the journey of learning and let the beauty of Spanish conjugation unfold before you.

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