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Unit 4 The Wonders of Nature
Section B Grammar Focus
人教版 八年级下册 英语课件
Contents
01. Grammar Review
Comparatives & Superlatives: Deep dive into comparative and superlative adjective forms.
02. Grammar Review: Large Numbers
Mastering the reading and writing of large numerical values in English.
prehensive Practice
Integrated exercises combining grammar points and vocabulary from the unit.
04. Summary & Homework
Key takeaways recap and assignment for further practice.
01
Grammar Review: Comparative and Superlative Adjectives & Adverbs
What are Comparatives & Superlatives
Comparative (比较级)
Used to compare two things or people.
Example:
Tom istallerthan John.
Superlative (最高级)
Used to compare three or more things or people.
Example:
Tom is thetallestboy in the class.
Forming Comparatives & Superlatives (1)
General Rule (一般情况)
Add-er / -est
fast → faster → fastest
high → higher → highest
Ends with 'e' (以 e 结尾)
Add-r / -st
nice → nicer → nicest
large → larger → largest
Forming Comparatives & Superlatives (2)
Rule 3: Consonant + y
Changey to i, then add-er / -est
happy →happier→happiest
early →earlier→earliest
Rule 4: CVC Pattern (Short Words)
Double the last consonant, then add-er / -est
big →bigger→biggest
hot →hotter→hottest
Forming Comparatives & Superlatives (3)
Rule 5: Multi-syllable & some Two-syllable Words
Structure:more + base form/most + base form
beautiful
Comparative
more beautiful
Superlative
most beautiful
interesting
Comparative
more interesting
Superlative
most interesting
carefully
Comparative
more carefully
Superlative
most carefully
Irregular Comparatives & Superlatives
Positive: good / well
Comparative:better
Superlative:best
Positive: bad / badly
Comparative:worse
Superlative:worst
Positive: many / much
Comparative:more
Superlative:most
Positive: little
Comparative:less
Superlative:least
Positive: far
Comparative:farther / further
Superlative:farthest / furthest
Using Comparatives
Comparative Form
A + be/V + 比较级 + than + B
Example: This river is longer than that one.
Equality (as...as)
as + 原级 + as (两者相同)
Example: The Pacific Ocean is as big as we think.
Inequality (not as...as)
not as/so + 原级 + as (前者不如后者)
Example: This hill is not as high as Qomolangma.
Using Superlatives
Structure 1: the + Superlative + in/of + Scope
Mount Qomolangma is thehighestmountaininthe world.
She is themost popularsingerofthe three.
Structure 2: one of the + Superlative + Plural Nouns
The Amazon isone of thelongestriversin the world.
Common Mistakes
Superlative Form (最高级)
Wrong: He is the taller boy in the class.
Right: He is thetallestboy in the class.
Note: 'the' must be used before superlatives (最高级前必须加 the)
Comparative Form (比较级)
Wrong: This book is more interesting as that one.
Right: This book is more interestingthanthat one.
Note: Use 'than' after comparatives (比较级后用 than)
Practice 1: Write the forms
Write down the comparative and superlative forms of the following words.
01. cheap
02. difficult
03. far
04. happy
05. slowly
Practice 2: Fill in the blanks
Fill in the blanks with the proper forms of the words in brackets.
1. This movie is ________ (interesting) than the one we saw yesterday.
2. She is the ________ (careful) student in our class.
3. The weather today is ________ (bad) than yesterday.
4. He runs ________ (fast) than his brother.
5. This is the ________ (good) book I have ever read.
Practice 3: Rewrite the sentences
1. Combine the sentences:Li Ming is tall. Wang Hao is taller.
Wang Hao is__________ __________Li Ming.
2. Change to superlative:This is a good book.
This is__________ __________ __________book I've ever read.
3. Combine using comparative:The Nile is 6,670 km long. The Amazon is 6,400 km long.
The Nile is__________ __________the Amazon.
02
Grammar Review: Large Numbers
Key Numbers: English Large Number Units
Hundred
中文: 百
100
Thousand
中文: 千
1,000
Million
中文: 百万
10
Billion
中文: 十亿
10
Trillion
中文: 万亿
10
How to Read Large Numbers
Step 1: Grouping
Start from the right and make a group every three digits, separated by commas.
123,456,789
Grouped by 3 digits
Step 2: Reading
Read from left to right, naming each group with billion, million, or thousand.
123billion
456million
789thousand
Step 3: Detail (UK)
Add 'and' between the hundreds and the tens/units in British English.
123
One hundredandtwenty-three
Practice: Read the Numbers
Read the following numbers aloud.
Number 01
5,895
Number 02
25,786
Number 03
10,200
Number 04
1,000,000
Practice 1: Write in English
Write the following numbers in English.
Question 01
3,456
Question 02
78,901
Question 03
1,234,567
Question 04
9,876,543,210
Practice 2: Write in Numbers
Question 1
two hundred and fifty-six
Answer: 256
Question 2
seven thousand, eight hundred and ninety
Answer: 7,890
Question 3
one million, two hundred and thirty-four thousand
Answer: 1,234,000
Question 4
five billion, six hundred and seventy-eight million
Answer: 5,678,000,000
03
Comprehensive Practice
Practice 1: Circle and Underline
Read the sentences. Circle the adjectives which compare things. Underline the comparatives or superlatives.
1. Which is thehighestmountain in the world
2. The Caspian Sea is thedeepestof all the salt lakes.
3. No ocean in the world is asbigas the Pacific Ocean.
4. The Nile is thelongestriver in the world.
Practice 1: Answers & Explanation
1. highest (Superlative)
Used to describe the mountain with the greatest altitude. It is the superlative form of 'high'.
2. deepest (Superlative)
Refers to the ocean with the maximum depth. This is the superlative form of 'deep'.
3. big (Positive / as...as)
Used in the structure 'as big as' to make an equal comparison between two objects.
4. longest (Superlative)
Describes the river with the greatest length. It is the superlative form of 'long'.
Practice 2 & 3: From Your Book
Practice 2: Write or say the numbers
5,895 (Five thousand, eight hundred and ninety-five)
25,786 (Twenty-five thousand, seven hundred and eighty-six)
10,200 (Ten thousand and two hundred)
1,000,000 (One million)
Practice 3: Complete the passage
Words: deep, big, clear, long, amazing
My friends and I visited Victoria Falls last year. It's one of the world's ______ natural wonders. When we arrived there, we were ______ by the sight. The water fall is about 108 meters ______ and 1,708 meters ______. You can see the mist from the falls from 20 kilometers away. It was the ______ experience of my life!
Practice 2 & 3: Answers
Practice 2: Numbers in Words
01.five thousand, eight hundred and ninety-five
02.twenty-five thousand, seven hundred and eighty-six
03.ten thousand, two hundred
04.one million
Practice 3: Vocabulary
01.biggest
02.amazed
03.deep
04.wide (Note: more appropriate than 'long')
05.most amazing
Additional Practice: Multiple Choice (1)
1. The Yellow River is one of ______ rivers in China.
A. long B. longer C. the longest D. the most long
2. This movie is ______ than the one we watched last week.
A. interesting B. more interesting C. most interesting D. the most interesting
3. She sings ______ in her class.
A. the most beautifully B. more beautifully C. the beautiful D. beautiful
4. The Pacific Ocean is ______ than the Atlantic Ocean.
A. big B. bigger C. the biggest D. more big
5. He is ______ student in our school.
A. taller B. the taller C. the tallest D. tallest
Additional Practice: Multiple Choice (2)
Choose the best answer to complete the sentences.
Question 6
Which is ______, the sun or the moon
A. big B. bigger C. the biggest D. more big
Question 7
This book is not ______ as that one.
A. interesting B. more interesting
C. most interesting D. the most interesting
Question 8
The population of China is ______ than that of Japan.
A. large B. larger C. the largest D. more large
Questions 9 & 10
9. He runs ______ than his sister.
A. fast B. faster C. the fastest D. more fast
10. This is ______ film I have ever seen.
A. exciting B. more exciting C. most exciting
Additional Practice: Fill in the Blanks (1)
Fill in the blanks with the proper forms of the words given.
1. The weather is getting ______ and ______ (warm).
2. This is ______ (difficult) question I have ever met.
3. She is ______ (careful) than her brother when she does her homework.
4. The Amazon is ______ (long) river in South America.
5. He speaks English ______ (fluently) than me.
Additional Practice: Fill in the Blanks (2)
Fill in the blanks with the proper forms of the words given.
6. My mother is the __________ (busy) person in my family.
7. Which is __________ (heavy), a kilo of cotton or a kilo of sugar
8. This park is __________ (beautiful) than that one.
9. The more you practice, the __________ (good) you will be.
10. It is one of __________ (important) events in history.
Additional Practice: Sentence Transformation
1. Tom is 160 cm tall. Mike is 170 cm tall. (用比较级合并)
Mike is ______ ______ Tom.
2. This story is very interesting. (改为最高级)
This is ______ ______ ______ story I have ever heard.
3. The red dress is 100 yuan. The blue is 150 yuan. (比较级)
The blue dress is ______ ______ the red one.
4. She is a good singer. (用最高级改写)
She is ______ ______ singer in our school.
5. My brother runs fast. I run faster. (用比较级合并)
I run ______ ______ my brother.
Additional Practice: Translation
Translate the following sentences into English.
1. 珠穆朗玛峰是世界上最高的山峰。
2. 这部电影比那部更有趣。
3. 他是我们班跑得最快的学生。
4. 太平洋是世界上最大的海洋。
5. 这本书不如那本书难。
Additional Practice: Complete the Dialogue
Complete the dialogue with proper words (Comparative or Superlative forms).
A:Which is 1. ________ (big) country in the world
B:Russia is the biggest. It's much 2. ________ (large) than China.
A:What about the population Which country has 3. ________ (many) people
B:China has the largest population. India is the second 4. ________ (large).
A:I see. And which river is 5. ________ (long) in the world
Additional Practice: Answers
Multiple Choice
1.C 2.B 3.A 4.B 5.C 6.B 7.A 8.B 9.B 10.D
Fill in the Blanks
1. warmer, warmer 2. the most difficult 3. more careful 4. the longest 5. more fluently
6. busiest 7. heavier 8. more beautiful 9. better 10. the most important
Sentence Transformation
1. taller than 2. the most interesting 3. more expensive than 4. the best 5. faster than
Complete the Dialogue
1. the biggest 2. larger 3. the most 4. largest 5. the longest
04
Summary & Homework
Summary
Comparatives & Superlatives
Form Rules
Regular: er/est or more/most. Irregular: good → better → best.
Usage Context
Compare two things (use 'than') or three+ things (use 'the', 'in/of').
Large Numbers
Key Units
Master the scale: hundred, thousand, million, billion, and beyond.
Reading Strategy
Efficiently parse numbers by grouping digits from the right in sets of three.
Homework
01. Review
Go over today's grammar points and exercises to reinforce your understanding.
02. Workbook
Complete the grammar exercises on page XX-XX of your workbook. Pay attention to the details.
03. Writing Task
Write a short paragraph (80 words) about your favorite natural wonder. Use at least 3 comparatives/superlatives and 2 large numbers.
Thank You!
See You Next Time!

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