At the same time it was found that several key language structures were very commonly used by all to perform particular functions. These common utterances will be presented in the next section, while the multiple form expressions will be dealt with later in the discussion of the corpus. Several key structures were commonly used by all teachers to fulfill particular lesson functions. Now, let’s have a look. Let’s read forward. Say what you just said again. I want to you circle this. I want to invite group 3 to have a read. I want you to think about it. Can you give an example? Let's read Part 2. Which group goes first? Among the above, the imperative was frequently used to manage students’ behavior. These phrases can be literally translated into ‘can or cannot’, ‘you think so or not’, ‘correct or not’. The students who have read it once raise your hand. His analysis of this article is very thorough. To complete this task, we will work in groups.