Present progressives describe an action in progress, or something that started in the past and is still happening. It is formed with the helping "to be" verb in the present tense and the present participle of the verb.

Find out how young Thomas Edison’s curiosity got him into trouble, and how, during his teen years, he lost his hearing but gained confidence as an aspiring inventor, in this video adapted from AMERICAN EXPERIENCE: Edison.

Reflexive pronouns reflect the subject of the sentence. A reflexive pronoun is a pronoun that is preceded or followed by the noun, adjective, adverb, or pronoun to which it refers within the same clause.

In this video segment from Nature, witness the joy an elephant family experiences when a new baby elephant is born. This birth was a celebration within elephant society. 

In these two lesson plans, students will learn to identify issues of importance, form their opinions, and support those opinions with evidence and reason. They will also learn how to state their feelings in a persuasive manner.

A relative adverb is a word that talks about a place, time, or reason for something. Remember the three "w's": where, when, and why.
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Pronoun case is determined by how we use the pronoun in a sentence. There are three ways: subjective, when the pronoun does something; objective, when something is done to our pronoun;

Verb tense is used to show when an action occurs, whether it is in the past, the present, or the future.