Unit 6 How long have you been collecting shells ?See the worldLearn EnglishChina goes to the world Grammar: sentence structure have + been +v+ing 现在完成进行hasEg: I have been learning English for five years. Li Lei has been dancing since 2000. For two years collect v. collection n. collector n. Eg: Li Lei collects stamps. My collection is about stamps. I am a collector. skate v.skate n. skater n.Eg: I can skate. I need a pair of skate. I am a skater. shell n. shell vt. shell vi.Eg: I have a shell. I shell the peanut. The peanut is shelling. marathon n.A kind of sports which sportsmen have a long way to run.I’d like to take part in marathon. pair n. a pair of Eg:I am near-sight. I want to buy a pair of glasses. Let’s play a making-up sentence game1. marathon n.2. collect v.3. pair n. 4. shell n. 5. skate v. 6. skate n. To make up some dialogues by using the present Perfect progressive tenseHomework: Thank you for cooperation Goodbye