Unit 23 A famous clock Lesson45（课件）-2025-2026学年新概念英语青少版（2008）5A

Unit 23 A famous clock Lesson 45 Warm-up ❓❓ 💬 What’s the most famous clock in your city/country? Pre-reading Has Big Ben ever gone wrong? (Read and find out!) When you visit London, one of the first things you will see is Big Ben, the famous clock which can be heard all over the world on the BBC. Reading Comprehension If the Houses of Parliament had not been burned down in 1834, the great clock would never have been erected. Big Ben takes its name from Sir Benjamin Hall, who was responsible for the making of the clock when the new Houses of Parliament were being built. It is not only of immense size, but is extremely accurate as well. Officials from Greenwich Observatory have the clock checked twice a day. On the BBC, you can hear the clock when it is actually striking, because microphones are connected to the clock tower. Big Ben has rarely gone wrong. Once, however, it failed to give the correct time. A painter who had been working on the tower hung a pot of paint on one of the hands and slowed it down! Answer questions about the text. Example: What's the name of the famous clock in London? Big Ben. 1 Is it one of the first things you'll see when you visit London? 2 It can be heard all over the world, can't it? 3 Which radio station can it be heard on? 4 What is the BBC? 5 What happened to the Houses of Parliament in 1834? Guided Conversation Guided Conversation Answer questions about the text. Example: Who did you see? Nigel Dykes. 6 Was Big Ben burned in the fire, too? 7 Who was responsible for making Big Ben? 8 Big Ben is called after him, isn't it? 9 How big is the clock? 10 How accurate is it? 11 How often is it checked? Ask questions about the text. Example: Big Ben is a famous clock. (What?) i)Is Big Ben a famous clock? ii)What is Big Ben? 1 It's in London. (Where?) 2 It's one of the first things a visitor sees. (What?) 3 It can be heard all over the world. (Where?) (Why?)(What?) 4 You can hear it on the BBC. (How?) 5 It's called after Sir Benjamin Hall. (Who?) Guided Conversation 6 He was responsible for making the clock. (What?)(Who?) 7 The Houses of Parliament were burnt down in 1834. (What?)(When?) 8 The clock was made when the new Houses of Parliament were being built. (When?) Guided Conversation Story Retelling Write a complete sentence in answer to each question, to make a paragraph of not more than 75 words. 1 When were the Houses of Parliament burnt down? Who was made responsible for the construction of a huge clock? Did it become known as Big Ben or not? (After... which...) 2 Why is it very accurate despite its immense size? (for) 3 Has this clock often gone wrong, or has it rarely gone wrong? Why can it be heard on the BBC when it is striking? (This clock which.. because.) Guided summary. Consider these two views. What's your opinion? 1 Tell us about a public clock that you know. Where is it, how old is it, and does it have a name? 2 Why did we put clocks on our public buildings in the past? Do we put clocks on our new public buildings? Why? Why not? 3 Are public clocks important in our cities these days? Why? Why not? 4 Before we had modern clocks, people had other ways of measuring time. Can you tell us about any of the methods they used? Talk about you. Talk About You Discussion Topic: "Why do modern buildings rarely have big clocks?" Mind Map: ⬇️ Past reason (indicating time) → ⬇️ Current reason (popularization of mobile phones) Reality Connection Evolution of Timekeeping Devices: Sundial → Hourglass → Mechanical Clock → Electronic Clock Question: "Which one could work without electricity? Why?" Cultural Expansion Thank you! $$