Hi guys, it's a senior. Can you write nine sentences in your IELTS writing task? Of course you can! I'm going to show you how to do it in three easy steps. But before we dive in, you may ask, do I really need to write complex sentences? The answer is yes. To get a band 6 for your grammar, you need to use a mix of simple and complex sentences. And to get a band 7, you need to use a variety of complex sentences. And right now, I'm going to show you how to create a band 9 sentence from a simple idea. The idea is: cars cause air pollution. Step number one: In order to make the sentence complex, we need to add at least one more sentence into this one. Ask yourself these questions: why, where, how, when, and what you could add. I chose the question "why." Why do cars cause air pollution? Because their engines emit CO2 or carbon dioxide into the atmosphere. This is already a complex sentence. Let me show you something. Let's copy it to the next slide. You could swap both parts of the sentence and say, "Because cars emit CO2 into the atmosphere, they cause air pollution." If you noticed, this sentence has a comma, while the first one doesn't. That's because the sentence begins with the dependent clause, which is a part of the sentence that depends on the other part. You can't just say, "Because causing me CO2." You must continue your sentence. It's easy to remember when your sentence starts from "because," "although," "while," "if," "until," or "when," you need a comma. Whenever the dependent clause comes first, you separate it with a comma. Even if these words are in the middle of the sentence, you don't...