（闽教版）四年级英语下册教案 unit 6 Unit 6 Shopping Lesson 12 Teaching aims and demands : To demand Ss to hear and speak and read these words correctly : review the words about food and vegetables To demand Ss to hear and speak the sentences correctly : Can I help you ? What do we need ?.Here’s the change. Teaching materials : tape recorder ; some cards Teaching steps : Step 1 Greetings T: Good morning, boys and girls. Glad to meet you. Step 2 Presentation Play a guessing game (1)T: What am I going to buy? What do I want? Just guess and say: "You want ..." (2)T= the teacher C= the computer Ss= the students C: Can I help you? (Learn to say: "Can I help you?") T: I want a sweater, sir. C: How about this one? Ss: It's too small. C: How about this one? T: The size is OK, sir. but I don't like this color. C: What's your favorite color? T: (take out a purple