高一英语（必修一）Module 5 A Lesson in a Lab Vocabulary and Speaking, Grammar 1 & 2Teaching Goals: 1. To get Ss to have knowledge of this grammar point: Degrees of comparison;2. To enable Ss to read some large English numbers.Teaching procedures:Step 1 Revision Check the Workbook Reading Exercises on page 93-94.Step 2 Vocabulary and SpeakingPurpose: To help Ss master the rules of reading English numbers.1. (Group Work) Ask Ss to read the numbers on the screen. 1 20 300 4,000 50,000 600,000 7,000,000 80,000,000 900,000,000 1,000,000,000Suggested answers:We writeWe say1one20twenty300three hundred4,000four thousand50,000fifty thousand600,000six hundred thousand7,000,000seven million80,000,000eighty million900,000,000nine hundred million1,000,000,000one billion (Please pay attention to the bold face. That’s the unit of the numbers.)2. (Individual Work) Ask some Ss to write some numbers on the blackboard while the teacher says some numbers. The more he / she get, the higher scores he / she get. (1) three hundred and forty-five (2) two thousand seven hundred and eighty-nine (3) ninety-eight thousand four hundred seventy-three (4) a hundred thousand eight hundred and eighty-eight (5) fifty-two million four hundred seventy thousand three hundred eighty-threeSuggested answers:(1) 345(2) 2,789(3) 98,473(4) 100,888(5) 52,470,3833. (Pair Work) Ask Ss to look at the numbers in Activity 1 on page 42. There are two mistakes. Let them to find them out.Suggested answers:52,470,383 should be said“fifty-two million, four hundred and seventy thousand, three hundred and eighty-three”.100,000,000 should be said one hundred million. 4. (Pair Work) Ask Ss to look at the fractions and think over how to read the fractions.Suggested answers:The upper ones are cardinal numbers and the lower ones are ordinal numbers.5. (Individual Work) Practice: Ask Ss to read these fractions in English: 1/5, 2/9, 3/8, 4/7, 5/6.Suggested answers:1/5: a fifth / one fifth2/9: two-ninths3/8: three-eighths4/7: four-sevenths5/6: five-sixths6. (Pair Work) Describe the fractions in Activity 2 as percentages.Suggested answers:A fifth is the same as 20%.Two-ninths is the same as 22.22% (twenty-two point two two recurring percent).Three-eighths is the same as 37.5%.Four-sevenths is the same as 57.14%.Five-sixths is the same as 83.33% ( eighty-three point three three recurring percent).7. (Pair Work) Ask Ss to finish Activity 4 on page 43. (Work in pairs to take turns asking and answering the questions.)Suggested answers:(1) 3，000，000 (2) 48，046，000 (3) 50，000，000 (4) 265，693，096 (5) 750，375，000(6) 80,000,000Step 3 Grammar 1Purpose: Let Ss know how to use the comparative degree.1. (Group Work) Ask Ss to express the meaning of the following pictures. (1)__________________________________________________. A B Line a:Line b: (2) ___________________________________________. A B(3) __________________________________. Suggested answers:1) Triangle A is bigger than Triangle B.2) Line b is two times as long as Line a.3) Rabbit A is as big as Rabbit B2. (Pair Work) Ask Ss to summarize the sentences patterns of comparison.Suggested answers:· as + 原级 + as; not as + 原级 + as Eg He likes her as much as he likes his sister. (他很喜欢她，同喜欢他的姐妹一样。
) It is not as hot in Beijing as in Wuhan. （北京没有武汉热· 比较级 + than； not + 比较级 + than; less + than Eg She sees me more often than she sees her brother.（她见我比见她弟弟的时间多· the + 最高级 + 比较范围 Eg This is the best picture in the hall. （这是大厅里最好的一张画· 倍数 + as + 原级 +as Eg This room is twice as large as that one. （这个房间是那个房间的两倍大· 倍数 + 比较级 + thanEg This room is twice larger than that one. （这个房间比那个房间大一倍· 倍数 + the length / height / depth / width / etc. of …. Eg This room is twice the size of that one. （这个房间是那个房间的两倍。
3. (Pair Work) Ask Ss to finish Activity 1 on page 43.Suggested answers:(1) it is more usual to say “I went there twice”. (2) 20 metres long(3) 400 kg4. (Pair Work) Ask the Ss to finish Activity 2 on page 43.Suggested answers:(2) Winter is four times colder in Harbin than in Beijing.Winter is four times as cold in Harbin as in Beijing.(3) Mount Qumolangma is about six times higher than Mount Tai.Mount Qumolangma is about as six times high as Mount Tai.(4) My aunt’s house is twice as larger as my house.My aunt’s house is two times larger than my house.(5) Tom weighs over twice as heavy as Lily.Tom is over two times heavier than Lily.Step 4 Grammar 2Purpose: Let Ss master the usage of comparison.1. (Group Work) Ask Ss to read the sentences in Activity 1 on page 47. Then answer those questions.Suggested answers:(1) 1、2、3 （2）2、3 (3) 12. (Group Work) Let Ss to draw a conclusion about the usage of com。