LessonLesson 8 8 WhyWhy areare plantsplants importantimportant 教案教案LearningLearning aims:aims: 1. Remember the new words: pleasant, shade, basic, soil2. The important sentences:1) be made of / in / from / by2) without 的用法LearningLearning method:method: Listen, say, read and write.LearningLearning steps:steps:StepStep 1.1. TalkingTalking Talk about: Why do we need trees? What kind of things can plants do?StepStep 2.2. LearningLearningLearn new words.StepStep 3.3. ReadingReadingRead the dialogue first. Then find out the useful expressions. StepStep 4.4. PracticePracticePractice the dialogue in pairs.StepStep 5.5. DoDo exercisesexercisesStepStep 6.6. HomeworkHomeworkRead the text after class, and try to recite it.