Unit 7 What's the highest mountain in the world-Section A-Grammar Focus-4c教案2024-2025学年人教版英语八年级下册

Unit 7 What's the highest mountain in the world-Section A-Grammar Focus-4c 【教学目标】 Language Ability: Master comparative/superlative forms of adjectives (e.g., higher, highest) and related sentence patterns (e.g., "Which is the + superlative...?"), apply them in real-life contexts. Cultural Awareness: Explore global natural landmarks through language, understand the significance of geographical data in cross-cultural communication. Thinking Quality: Compare and classify information logically (e.g., heights of mountains), analyze grammatical rules through examples. Learning Ability: Develop inductive learning skills by summarizing comparative/superlative rules, practice autonomously via exercises. 【教学重难点】 Key: Formation and usage of comparative/superlative adjectives (regular/irregular forms), sentence structures for comparisons and superlatives. Difficult: Distinguishing between "comparative + than" and "the + superlative", correct application of irregular forms (e.g., good→better→best). Avoiding logical errors in comparisons (e.g., excluding the subject itself). 【教学过程】 一、课程导入（Lead - in） T: Hello, class! We had an interesting discussion about Qomolangma last class. Let's quickly review some facts. Who can tell me how high Qomolangma is? S: It is 8,844.43 meters high. T: Right! And where is it located? S: In the southwestern part of China, as part of the Himalayas. T: Great. Now, let's think about this. We know Qomolangma is very high. But when we compare it with other mountains, we use special forms of adjectives. For example, we say Qomolangma is higher than any other mountain in the world. Here, "higher" is a special form of the adjective "high". Do you know what this form is called? S: （Some students may answer "comparative form"） T: Exactly! The comparative form of an adjective is used when we compare two things. Now, let's look at some pictures on the screen.（Show pictures of two different - sized boxes, one big and one bigger） Look at these two boxes. How can we describe them using adjectives? S1: The red box is big, and the blue box is bigger. T: Very good. Here, "bigger" is the comparative form of "big". Now, let's recall some other adjectives we know and try to make comparative sentences. For example, if I say "tall", can you make a sentence comparing two people? S2: Tom is tall, but Mike is taller. T: Excellent! Now, let's move on to a more challenging part. When we want to say which one is the most among a group of things, we use another form. For example, among all the mountains in the world, Qomolangma is the highest. "Highest" is this special form. What is it called? S: Superlative form! T: Correct. The superlative form of an adjective is used when we compare three or more things. Now, let's look at these pictures again.（Show pictures of three boxes, small, bigger, and the biggest） How can we describe these boxes using the superlative form? S3: The green box is small, the yellow box is bigger, and the purple box is the biggest. T: Perfect. Now, we are going to explore more about these important grammar points - the comparative and superlative forms of adjectives and adverbs in our Grammar Focus part. 二、Grammar Focus 讲解 Comparative and superlative forms of adjectives T: Open your books to the Grammar Focus on page 52. First, let's look at the rules for forming the comparative and superlative forms of adjectives. For one - syllable adjectives, we usually add - er for the comparative form and - est for the superlative form. For example, "tall - taller - tallest", "short - shorter - shortest". Read these examples aloud. S: Tall - taller - tallest. Short - shorter - shortest. T: Good. Now, for adjectives with two syllables that end in - y, we change the - y to - i and then add - er for the comparative form and - est for the superlative form. Take "funny" as an example. How do we form its comparative and superlative forms? S: Funny - funnier - funniest. T: Right. Read it together. S: Funny - funnier - funniest. T: Now, for most two - syllable adjectives and all adjectives with three or more syllables, we use "more" for the comparative form and "most" for the superlative form. For example, "beautiful - more beautiful - most beautiful", "interesting - more interesting - most interesting". Read these aloud. S: Beautiful - more beautiful - most beautiful. Interesting - more interesting - most interesting. T: There are also some irregular adjectives. The forms of their comparative and superlative are not formed by the regular rules. For example, "good - better - best", "bad - worse - worst", "many / much - more - most". Repeat these irregular forms after me. S: Good - better - best. Bad - worse - worst. Many / much - more - most. T: Now, let's do some quick practice. I will say an adjective, and you tell me its comparative and superlative forms. "Long". S: Long - longer - longest. T: "Heavy". S: Heavy - heavier - heaviest. T: "Difficult". S: Difficult - more difficult - most difficult. T: "Far" (in the sense of distance). S: Far - farther - farthest. T: Good job. Now, let's look at some sentences using these forms in the Grammar Focus. "Qomolangma is higher than any other mountain in the world." Why do we use "higher" here? S: Because we are comparing Qomolangma with other mountains, and it's a comparison between two things (Qomolangma and each of the other mountains). T: Exactly. And "The Nile is the longest river in the world." Why do we use "longest" here? S: Because we are comparing the Nile with all the other rivers in the world, which is a comparison among three or more things. T: Right. Now, let's make some sentences of our own. Use the adjectives given and make comparative and superlative sentences. "Big", compare three animals, like an elephant, a tiger, and a mouse. S4: An elephant is big, a tiger is bigger than a mouse, and an elephant is the biggest among them. T: Great. Now, you try with the adjective "clever", comparing two students in our class and then considering all the students. S5: Lucy is clever, but Lily is cleverer. And Lucy is one of the cleverest students in our class. Comparative and superlative forms of adverbs T: Now, let's move on to the comparative and superlative forms of adverbs. Many adverbs are formed from adjectives by adding - ly. For these adverbs, we use "more" for the comparative form and "most" for the superlative form. For example, "quickly - more quickly - most quickly", "carefully - more carefully - most carefully". Read these aloud. S: Quickly - more quickly - most quickly. Carefully - more carefully - most carefully. T: There are also some irregular adverbs. For example, "well - better - best", "badly - worse - worst", "far - farther / further - farthest / furthest" (both "farther" and "further" can be used for distance, but "further" can also be used for abstract meanings like "further study"). Repeat these irregular adverbs. S: Well - better - best. Badly - worse - worst. Far - farther / further - farthest / furthest. T: Now, look at the sentences in the Grammar Focus related to adverbs. "He runs faster than his brother." Here, "faster" is the comparative form of the adverb "fast". "She sings the most beautifully in our class." "Most beautifully" is the superlative form of the adverb "beautifully". Let's make some sentences with adverbs. I'll give you a verb, and you use the correct form of the adverb to make a comparative or superlative sentence. "Run", compare two people. S6: Tom runs fast, but Jack runs faster. T: Good. Now, "write", consider all the students in the class. S7: Lily writes carefully, and she writes the most carefully in our class. 三、4a 练习讲解 T: Now, turn to page 53, look at 4a. Here, we have some sentences, and we need to fill in the blanks with the correct forms of the words in the brackets. Let's do the first one together. "This box is ______ (heavy) than that one." What form should we use here? S: Comparative form. T: Right. And the word "heavy" has two syllables and ends in - y. So, how do we change it? S: Change - y to - i and add - er. So, it's "heavier". T: Correct. Let's fill it in. Now, you do the second one on your own. "The red shirt is the ______ (cheap) of all the shirts." （Students do the exercise） T: Let's check the answer. What should it be? S: Cheapest. T: Great. Because we are comparing among all the shirts, so we use the superlative form. The regular way for "cheap" (one - syllable word) is to add - est. Now, let's continue with the rest of the sentences in 4a. （Go through all the sentences in 4a, checking answers and explaining any misunderstandings） 四、4b 练习讲解 T: Now, look at 4b. In this exercise, we need to use the information in the box to make sentences using "as... as" or "not as... as". First, let's review the usage. "As... as" means two things are equal in a certain aspect, and "not as... as" means one thing is less in a certain aspect compared to the other. For example, if we say "Tom is as tall as Jack", it means Tom and Jack have the same height. If we say "Tom is not as tall as Jack", it means Tom is shorter than Jack. Now, let's do the first sentence together. "The sun / big / the moon." How can we make a sentence using "as... as" or "not as... as"? S: The sun is not as small as the moon. (Or: The moon is not as big as the sun.) T: Good. Both are correct. Now, you do the second one, "The Nile / long / the Yangtze River". （Students do the exercise） T: Let's check. What did you write? S8: The Yangtze River is not as long as the Nile. (Or: The Nile is longer than the Yangtze River. But according to the requirement of using "as... as" or "not as... as", the first answer is more suitable here.) T: Right. Now, continue with the rest of the sentences in 4b. （Go through all the sentences in 4b, checking answers and discussing different ways of making sentences） 五、4c 小组活动（Group work） T: Now, let's do a group activity. Work in groups of four. Each group needs to choose a topic, such as "Our School", "Animals", "Food", etc. Then, make a list of at least five things related to your topic. After that, use the comparative and superlative forms of adjectives and adverbs to write sentences about these things. For example, if your topic is "Our School", you can write "The library is the quietest place in our school." or "The playground is bigger than the basketball court." You have 10 minutes to complete this task. （Students work in groups, discussing and writing sentences） T: Okay, time's up. Now, each group chooses a representative to come to the front and share your sentences with the class. Let's start with Group 1. Group 1 representative: Our topic is "Animals". The elephant is the biggest animal among them. The cheetah runs faster than the lion. The panda is more lovely than the bear. The snake moves more quietly than the rabbit. The giraffe has the longest neck. T: Great job, Group 1. The sentences are well - made and you used the grammar correctly. Now, Group 2. （Each group takes turns to share their sentences, and the teacher gives feedback and praise） 六、课堂总结（Summary） T: Today, we've learned a lot about the comparative and superlative forms of adjectives and adverbs. We know how to form them, and we've practiced using them in sentences. Can anyone summarize the key points? S9: For one - syllable adjectives, we add - er for comparative and - est for superlative. For two - syllable adjectives ending in - y, we change - y to - i and add - er / - est. For most two - syllable and all three - or more - syllable adjectives, we use "more" and "most". There are also irregular forms. For adverbs, many - ly adverbs use "more" and "most", and there are irregular adverbs too. We also learned "as... as" and "not as... as". T: Excellent summary. Remember, grammar is very important in learning English because it helps us express our ideas more accurately. Keep practicing these forms in your daily English learning. 七、作业布置（Homework） T: For homework, I want you to write a short passage about your family members. Use at least five sentences with the comparative and superlative forms of adjectives and adverbs. For example, "My father is the tallest in my family." "My sister runs faster than me." Also, review what we learned today and preview the next part of the unit. Class is over. Goodbye, everyone! S: Goodbye, teacher! 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$