Although we use the passive tense in the present tense, it's used in other tenses, too, and that's what we look at in this lesson.

Here are some examples of sentences using both the active and passive voices. Different tenses are used, too!

What are causatives? Causal verbs are used to cause things to happen. They're used in causative constructions. Although there are various specific verbs in this category, we commonly use four ordinary verbs for this: ("have," "let," "get," and "make"). Let's make some sense of them.

Now that you have an idea about what causal verbs and causal constructions are, let's give them some context. We're still using the verbs "have," "let," "get," and "make," and the theme is housepainting.

Let's look "under the hood," and see how to build causative constructions using "have," "let," "get," and "make."

Sigrid introduces passive causative constructions, which combine causal verbs and the passive voice. We use them all the time in everyday conversation when we focus on the object rather than the subject.

This segment lays out the building blocks of a passive causative construction. We also compare and contrast causative constructions with other similar constructions. Sigrid uses the expression "to mix and match," which means putting different things together in different ways.

It's time to mix and match the formulas we've talked about. Sigrid mixes and matches them to talk about stuff she can't or doesn't want to do herself. She invites you to do the same.

In the United States, there are rights that allow all people who are accused of something to defend themselves: "the rule of law" and "due process of law." Right now, these rights are being challenged, and so it's important to know what they're all about.

Richard Williams, better known by his stage name Prince Ea, is an American spoken word artist, poet, rapper, and filmmaker. He formed the "Make 'SMART' Cool" movement in 2009, which is dedicated to promoting the ideals of education, intelligence, unity, and creativity through hip hop.

In this clip, Mark Powell provides best practice tips for opening and closing presentations. The key is often beginning with a story or anecdote that engages the audience.

Mark Powell closes his tutorial with advice about structuring your presentation, and how to leave a lasting impression on your audience.

In this grammar lesson, the function and proper use of prepositions is demonstrated. How many different prepositions can you find?

How does a volcano actually form? This informative video on the topic is brought to you by National Geographic Kids!

We can use nouns, verbs, or adjectives to describe someone's personality. Sigrid shows us how to describe someone with a strong personality.