Carlos teaches us how to conjugate Spanish verbs for commands, also known as the imperative mood, with the informal second person singular pronouns, "tú" and "vos."

Carlos teaches us the imperative conjugations of some commonly used verbs with the second person singular pronoun, "tú," as well as the formulas for creating the imperative with pronouns such as "usted," "vosotros" or "vosotras" and "ustedes."

To begin his lessons about diminutives and augmentatives, Carlos begins by speaking about suffixes, or endings added to words to alter their meaning.

Carlos explains how the purpose of diminutive and augmentative suffixes is to express increased or decreased intensity of the word to which they are attached and gives us some common examples in Spanish.

The present perfect tense in Spanish is used when an action in the past occurs within a time period that has not yet concluded. Carlos clearly explains how this compound verb tense is formed as well as giving us several examples.

The many types of past tense in Spanish can get confusing for English speakers. In this lesson, Carlos focuses on the simple past tense, or preterite, providing us with some excellent examples.

Carlos explains to us the range of meanings that the verb "tocar" can have in Spanish, depending upon the context.

The word, "vaina," is popularly used in many Latin American countries, and according to Carlos, who explains its origin and diverse uses, "defines everything and nothing at the same time."

Carlos explains to us, with examples, situations in which the present perfect tense should be employed.

In addition to beginning his explanation regarding situations in which the past imperfect tense is commonly used in Spanish, Carlos explains to us how to conjugate regular -ar, -er and -ir verbs as well as sharing with us some of the most common irregular verbs and their imperfect conjugations.

Carlos explains in detail the correct use of the negative form of the imperative tense, providing several examples.

Carlos explains to us in detail the imperative of the first person plural with many examples as well as providing us with the conjugations for several reflexive verbs.

Do you get confused when it comes to choosing between the prepositions "por" and "para"? In this series of videos, Carlos will clearly explain the difference between the two, with plenty of examples.

In the second part of this lesson, Carlos focuses on additional uses of the frequently confused prepositions, "por" and "para," particularly when talking about time and location.

We finish this series on the prepositions, "por" and "para," with some additional, quite common uses for you to put into practice.