A la profesora le gusta que los alumnos vuelvan a la biblioteca para estudiar.
A direct object pronoun replaces a direct object, that is a noun that directly receives the action of a verb in a sentence. Moreover, direct object pronouns in Spanish agree in number and gender with the nouns they replace. In the sentence:
<em>Compro </em><em>la gasolina </em><em>en la estación de servicio</em>
<em>La gasolina</em> is the direct object because it receives the action comprar. Since <em>la gasolina </em>stands for the third person singular in feminine form, we need to use the direct object pronoun that matches this person, that is, la. Therefore, the new sentence is:
<em>La </em><em>compro en la estación de servicio</em>
For the verb form <span>él cree, there are only two correct options: 3rd person and singular.
It is the third person and singular because él in Spanish means he in English, which is 3rd person singular.</span><span>
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They are running by participants during the running of the bulls.
