Basic listening skills. Okay, let's understand the grammar of this lesson. Some students do not understand the difference between must and have to both must and have to express obligation or necessity. But there are some small differences. Master expresses the speaker's feelings, whereas have to expresses above all and impersonal idea. For example, you must come, you are obliged to come by require that you come, you have to come.

So, you are obliged to come there is a rule or requiring you to come must I wear this tie? It means am I obliged to wear this tie What do you think? Do I have to wear this tie? Am I obliged to wear this tie is there a rule about ties. So, this is a difference between master and have to have to mainly expresses general obligations while masters use for specific obligations. For example, I must Sorry, I have to brush my teeth twice a day, I must tell you something.

So I have to express this general idea general obligations But Master is used for specific obligations. So this is a difference between must and have to. The next part is that's why that's why after that's why we use subject and verb. So, listen to the entire lesson. That's is short for that is here. You are telling someone because of this, or therefore.

So we use this to tell someone because of this or therefore, here are some examples. That's why people admire you. That's why she appears so happy. That's why babies crawl before they can walk. That's why Pam cries at sad movies. That's why you fail to understand.

So, we are trying to give a reason here. And we are telling someone because of this or therefore very important structure. In this bar we speak about conditional type one. type one conditional sentences are used to talk about real and possible situations. Here We'll use a simple present tense in the F clause and will can may plus infinity in the result clause. Study the sentences even below.

For example, if I'm hungry, I will get something to eat. If you are hungry, you can eat an apple. If it rains, we may get wet. So we speak about something that is real and possible. The last part is such as we can use such as as to introduce an example, or examples of something we mentioned. We normally use a comma before such as when we present a list of examples where there is just one example, we don't need To come up.

For example, this shop specializes in tropical fruits such as pineapples, mangoes and papayas. For example, pineapples, mangoes and papayas. So we use such as to introduce examples. Do not forget this