Carlos explains the forms of address used to address several conversational partners: "vosotros" and "vosotras," which tend to be used in Spain, and "ustedes," which tends to be used in Central and South America.

A doctor from Ecuador speaks to us about respiratory allergies, particularly those which cause recurrent symptoms in children.

Cleer awaits a phone call from Lida to find out whether or not she got the job for which she recently interviewed.

Cleer attends her first post-college interview for a marketing position.

Known as the "tuteo," the "ustedeo" and the "voseo," Carlos explains the historical roots and evolution of these varying ways of saying "you" in different parts of the Spanish-speaking world. Factors which affect which form is utilized by a particular person in a particular situation include that person's country of origin as well as the relationship between the speaker and the person to whom he or she is speaking.

Freshly out of college, Cleer Oviedo sets up an interview for a potential marketing job.

General practitioner, María José Pineda, gives us some tips to improve our sleep quantity and quality.

Carolina explains the importance of agreement with possessive adjectives, which must always agree both in number and in person with the nouns they modify.

Carlos explains to us the three manners of addressing a conversational partner in Spanish: "tú," "usted" and "vos." Although all three of these personal pronouns could be translated as "you," the one that is utilized in a particular context depends upon factors such as the region where one lives as well as one's relationship with the person with whom he or she is speaking.

Carolina introduces us to the concept of possessive adjectives and gives us some examples of their long and short forms.

Doctor Maria Jose Pineda gives us several tips for taking care of our skin, the largest organ in the human body.

In this final part of the videos dedicated to accentuation, Carlos explains diphthongs, triphthongs and hiatuses.