老师：hello boys and girls nice to meet you im guoxiang from hongshan secondary school。 Today we are going to learn Unit 2, great people, study skills. Look at the picture. When we choose clothes, we should know which one is formal.
学生：Which one is informal. By the knowledge of world formation, we can guess the meaning of informal and.
老师：Formal. Four more means public or official. Informal means not formal or official. When we speak, alright, we can use formal and informal language. We use formal language with our teachers or unfamiliar people, because we should respect teachers.
学生：However, when we speak or write to our friends, we can use informal language. Formal language is more common when we write. Informal language is more common when we speak. So when we want to write a postcard, we use informal language. When we want to write a letter to our friends, we use informal language too. But when the Queen gives speech, she always uses formal language. Here are some more examples.
老师：About formal and informal language. The first one, formal or informal academic writing, yes, formal language. Business letters, for example, if you want to write letters to a CEO of a big company, you can use, yes, formal language, No. 3, personal Kerinda. Informal. Personal text messages, also informal. Law, formal workplace for business, formal language. So in today's lesson.
学生：We will learn the differences between.
老师：Formal and informal language. When people meet each other, we may say good morning, good afternoon, good evening, hello, hi. Greetings such as hi, hello, are informal language. Other greetings like dear, missed, Miss, Ladies and gentlemen, are formal language.
学生：Read the letter and guess the relationship between the sender, Sally, and the receiver. Mary.
老师：Dear Mary, how are you doing these days? I'm so glad to hear you have passed exams. Congratulations. Last week I ran across Monica in the street. She invited me to go to her school party next Friday. So why not join us? Yours, Sally, pay attention here. Endings such as lots of love and yours can be used only in informal letters or emails. They are friends, so they use informal language.
老师：Have a big mouse.
学生：Have a big mouse means some people say something that are meant to be kept a secret.
老师：Next one, in the soup.
学生：It means in difficult situation in the soup. And have a big mouse are idioms. Idioms are a group of words in a fixed order that have a particular meaning.
老师：For these idioms, they are informal language. Next, we talk about abbreviation. As soon as possible, you can write in this way. This is the shop form. Abbreviations, they are often used in informal writing.
老师：in Chinese it means，简写，简称，缩略语， lets see some more examples as soon as possible tv。
老师：
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