Don’t eat in class.Unit 4Section A22d-Grammar Focus2d. Role-play the conversation.John: Hi, my name’s John. It’s my first day at school.Alice: Hi, John. I’m Alice. This is a great school, but there are a lot of rules.John: Really? What are some of the rules?Alice: Well, don’t be late for the class. This is very important. John: OK, so we must be on time. Can we bring music players to school?Alice: No, we can’t. And we always have to wear the school uniform.John: I see.Alice: Oh, and we also have to be quiet in the library.1. arrive?late?for?与be?late?for?意思相近, 都表示“迟到”。Don’t?arrive?/be late?for?school. 上学别迟到。I?arrived/was late for the meeting yesterday. 我昨天开会迟到了。2. OK, so we must be on time. 对的，所以我们必须守时。 1)must作为情态动词，表示“必须”、“务 必”，有时还表示“一定”，起到加强语 气的作用。如： You must come tomorrow. 你(们)明天必须来。 She must have this dictionary. 她一定有这本字典。2) on time是一个固定介词短语，表示“按 时；准时”。如： We must get to school on time. 我们必须按时到校。 Planes and trains don’t always arrive on time. 火车、飞机并不总是准点到达。3) 系动词be与形容词或介词短语联用， 是英语一种见的语句结构，表示某种 状态。如： be quiet 保持安静；be strict 要求严格 |
