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.

There are two types of grammatical agreement in Spanish: noun agreement and verb agreement. In this chapter, Carlos explains to us the concept of noun agreement. Let's see what it's about!

In this second part of this lesson on grammatical agreement, Carlos explains verb agreement, or the necessary correspondence of number and grammatical person between a verb and its subject.

The terms "matemático" and "matemática" in Spanish can be used in a variety of ways, in singular and in plural, as nouns or adjectives, to mean different things. Carlos explains this and more in this introduction to Spanish math terminology.

Carlos shows us how to express the four types of mathematical operations in Spanish as well as teaching us terms that are frequently heard on the news and in studies.

In the first part of this lesson devoted to the five senses, Carlos will enlighten us regarding some different meanings of the word "sentido" in Spanish as well as telling us the Spanish names for the five senses.

In this second part of his lesson on the five senses, Carlos will share Spanish vocabulary related to our senses of hearing, taste, touch, sight, and smell.

There are many Spanish expressions that are related to the five senses. In this video, Carlos will teach us several that are related to the sense of sight, many of which have similar English counterparts.