The document discusses the present continuous and present simple tenses in English grammar. The present continuous is used to describe actions happening now, and is formed using a form of "to be" plus the verb with "-ing." The present simple describes facts or habitual actions, and is used with words like "often" or "always." It then provides examples to test the reader's knowledge of when to use each tense, asking them to fill in verbs in sentences using the present continuous or present simple form.