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【三阶递进·六维覆盖】八年级上册单元语法大练兵
Unit 4 Amazing Plants and Animals
方法说明：
三阶递进从基础巩固、能力提升到综合运用由浅入深，六维覆盖从形式识别、规则应用、语境辨析、逻辑分析、语篇整合到创意表达，形成完整学习闭环。
核心语法：
形容词的比较级和最高级（规则变化和不规则变化）、比较级句型（than / much, a little 修饰比较级）、最高级句型（the + 最高级 + 范围）、as...as / not as...as 句型、动物和植物词汇（amazing / dangerous / huge / tiny / colorful / rare）
一阶：基础巩固
维度1：形式识别
写出下列形容词的比较级和最高级
原级 比较级 最高级
tall
big
nice
heavy
beautiful
dangerous
good
bad
many
little
（二）写出下列形容词的汉语意思
1.amazing __________ 2.dangerous __________3.huge __________
4.tiny __________ 5.colorful __________ 6.rare __________
7.clever __________ 8.powerful __________9.gentle __________
10.sharp __________
（三）用所给词的适当形式填空（比较级）
1.A giraffe is __________ (tall) than a horse.
2.An elephant is __________ (heavy) than a tiger.
3.A mouse is __________ (small) than a rabbit.
4.Flowers are __________ (beautiful) than grass.
5.This plant is __________ (amazing) than that one.
6.Snakes are __________ (dangerous) than rabbits.
维度2：规则应用
（一）用所给形容词的适当形式填空（比较级或最高级）
1.The blue whale is the __________ (large) animal in the world.
2.Cheetahs run __________ (fast) than horses.
3.Which is __________ (big), the sun or the moon
4.This is the __________ (beautiful) flower in the garden.
5.Dogs are __________ (clever) than fish.
6.Mount Qomolangma is the __________ (high) mountain in the world.
7.Elephants have the __________ (long) noses of all animals.
8.I think cats are __________ (good) pets than snakes.
（二）用 as...as / not as...as 填空
1.A horse is __________ fast __________ a cheetah. （不如……快）
2.This flower is __________ beautiful __________ that one. （和……一样）
3.A cat is __________ big __________ a tiger. （不如……大）
4.The tree is __________ tall __________ the building. （和……一样高）
5.A mouse is __________ heavy __________ an elephant. （不如……重）
6.This plant is __________ amazing __________ that one. （和……一样神奇）
（三）用 much 或 a little 填空
1.Elephants are __________ bigger than mice. （大得多）
2.My dog is __________ smarter than your cat. （聪明一点）
3.This tree is __________ taller than that one. （高得多）
4.She is __________ more beautiful than her sister. （漂亮一点）
5.The blue whale is __________ heavier than the elephant. （重得多）
二阶：能力提升
维度3：语境辨析
（一）选词填空（用所给形容词的适当形式填空）
A：Hi, Tom! Do you like animals
B：Yes, I do. I think elephants are (1) __________ (amazing) animals on land.
A：Really Why do you think so
B：Because they are very (2) __________ (smart). And they are much (3) __________ (big) than other animals.
A：But I think tigers are (4) __________ (dangerous) than elephants. They are very (5) __________ (powerful).
B：That's true. But elephants are more (6) __________ (gentle) than tigers. What's your favorite animal
A：I like dolphins. They are (7) __________ (clever) animals in the ocean. They are much (8) __________ (friendly) than sharks.
B：Yes, I agree. Dolphins are not as (9) __________ (dangerous) as sharks.
（二）在语境中圈出正确的词
1.This flower is (beautiful / more beautiful) than that one.
2.Elephants are the (big / biggest) land animals.
3.My cat is (friendly / friendlier) than my dog.
4.This is the (most amazing / more amazing) plant I've ever seen.
5.Snakes are not as (friendly / friendlier) as rabbits.
6.The weather today is (bad / worse) than yesterday.
7.This is the (good / best) book about animals.
8.Goldfish are (easier / easiest) to keep than dogs.
维度4：逻辑分析
根据信息比较动物，判断句子正(T)误(F)
Animal Speed (km/h) Weight (kg) Lifespan (years)
Cheetah 120 60 12
Horse 70 500 25
Elephant 40 6000 70
Turtle 1 200 150
( ) 1. Cheetahs run faster than horses.
( ) 2. Elephants are heavier than horses.
( ) 3. Turtles live longer than elephants.
( ) 4. Horses are slower than elephants.
( ) 5. Cheetahs are the fastest animals among the four.
( ) 6. Elephants are the heaviest animals among the four.
（二）阅读短文，回答问题
Plants and animals are amazing! The blue whale is the largest animal in the world. It is much bigger than the elephant. It can grow up to 30 meters long. The cheetah is the fastest animal on land. It runs faster than any other animal. Some plants are also very special. The rafflesia is the largest flower in the world. It is much larger than a human head. But it smells very bad! The baobab tree is very interesting. It is not as tall as the redwood tree, but it can live for thousands of years. Redwood trees are the tallest trees in the world. They are much taller than baobab trees.
回答问题：
1.What is the largest animal in the world
→ ________________________________.
2.How long can a blue whale grow
→ ________________________________.
3.What is the fastest animal on land
→ ________________________________.
4.Which is larger, the rafflesia or a human head
→ ________________________________.
5.Are redwood trees taller than baobab trees
→ ________________________________.
（三）将下列句子按逻辑顺序排列，组成一段通顺的短文
( ) Tigers are much more dangerous than dogs.
( ) I think the most amazing animals are tigers.
( ) They are also very powerful and fast.
( ) They run faster than almost all other animals.
( ) Their beautiful orange and black stripes make them look very cool.
正确的顺序：______ → ______ → ______ → ______ → ______
三阶：综合运用
维度5：语篇整合
（一）短文改错（每句一处错误，共6处）
(1) The blue whale is the big animal in the world.
(2) It is heavy than the elephant.
(3) The cheetah is fast animal on land.
(4) It runs faster than any others animals.
(5) Some plants are also amazing as animals.
(6) The rafflesia is more large than a human head.
请写出序号、错误和改正：
(1) 错误：______ 改正：______
(2) 错误：______ 改正：______
(3) 错误：______ 改正：______
(4) 错误：______ 改正：______
(5) 错误：______ 改正：______
(6) 错误：______ 改正：______
（二）语法填空（10空）
用括号内词的适当形式填空：
Hello! I'm a nature lover. In my opinion, plants and animals are (1) __________ (amazing) things in the world. Elephants are much (2) __________ (big) than horses. They are also very (3) __________ (smart) animals. The cheetah is (4) __________ (fast) animal on land. It runs (5) __________ (fast) than any other animal. Some flowers are very beautiful. The rose is (6) __________ (popular) flower in many countries. But the rafflesia is the (7) __________ (large) flower. It is not as (8) __________ (beautiful) as roses. In fact, it is the (9) __________ (bad) smelling flower in the world! Plants and animals are really (10) __________ (amaze). Let's protect them!
（三）完成下列对话
A：Hi, Mary! (1) ____________________（你最喜欢什么动物）
B：I like dolphins best. They are very clever and friendly.
A：(2) ____________________（海豚比鲨鱼更聪明吗）
B：Yes, they are much smarter than sharks.
A：(3) ____________________（哪种动物跑得最快）
B：The cheetah runs the fastest of all animals.
A：(4) ____________________（大象比老虎大吗）
B：Yes, elephants are much bigger than tigers.
A：(5) ____________________（你认为最漂亮的植物是什么）
B：I think roses are the most beautiful flowers.
维度6：创意表达
（一）我最喜欢的动物（至少60词）
要求：
介绍你最喜欢的动物，并描述它的特征。
将其与其他至少两种动物进行比较。
说明你为什么喜欢它。
至少用3个比较级。
至少用2个最高级。
至少用1个 as...as 或 not as...as 句型。
参考开头：My favorite animal is...
（二）神奇的植物（至少50词）
要求：
介绍一种你认为神奇的植物。
将它与其他植物进行比较。
描述它的特别之处。
至少用2个比较级。
至少用2个最高级。
至少用1个感叹句。
参考开头：I think the most amazing plant is...
参考答案
一阶
维度1（一）：
原级 比较级 最高级
tall taller tallest
big bigger biggest
nice nicer nicest
heavy heavier heaviest
beautiful more beautiful most beautiful
dangerous more dangerous most dangerous
good better best
bad worse worst
many more most
little less least
维度1（二）：
令人惊奇的 2. 危险的 3. 巨大的 4. 微小的 5. 色彩缤纷的
6. 稀有的 7. 聪明的 8. 强大的 9. 温和的 10. 锋利的
维度1（三）：
1.taller 2. heavier 3. smaller 4. more beautiful 5. more amazing 6. more dangerous
维度2（一）：
1.largest 2. faster 3. bigger 4. most beautiful 5. cleverer / more clever 6. highest 7. longest 8. better
维度2（二）：
1.not as, as 2. as, as 3. not as, as 4. as, as 5. not as, as 6. as, as
维度2（三）：
1.much 2. a little 3. much 4. a little 5. much
二阶
维度3（一）：
(1) the most amazing (2) smart (3) bigger (4) more dangerous (5) powerful (6) gentle (7) the cleverest / most clever (8) friendlier / more friendly (9) dangerous
维度3（二）：
1.more beautiful 2. biggest 3. friendlier 4. most amazing 5. friendly 6. worse 7. best 8. easier
维度4（一）：
1.T 2. T 3. T 4. F（马比大象快） 5. T 6. T
维度4（二）：
1.The blue whale.
2.It can grow up to 30 meters long.
3.The cheetah is the fastest animal on land.
4.The rafflesia is larger than a human head.
5.Yes, they are much taller than baobab trees.
维度4（三）：
正确的顺序：2 → 1 → 3 → 4 → 5
（I think the most amazing animals are tigers. → Tigers are much more dangerous than dogs. → They are also very powerful and fast. → They run faster than almost all other animals. → Their beautiful orange and black stripes make them look very cool.）
三阶
维度5（一）：
(1) 错误：big；改正：biggest
(2) 错误：heavy；改正：heavier
(3) 错误：fast animal；改正：the fastest animal
(4) 错误：others；改正：other
(5) 错误：as；改正：as（本句无错误，保持原样）或可改为 Plants are as amazing as animals.
(6) 错误：more large；改正：larger
维度5（二）：
(1) the most amazing (2) bigger (3) smart (4) the fastest (5) faster (6) the most popular (7) largest (8) beautiful (9) worst (10) amazing
维度5（三）：
(1) What's your favorite animal
(2) Are dolphins cleverer than sharks
(3) Which animal runs the fastest
(4) Are elephants bigger than tigers
(5) What plant do you think is the most beautiful
维度6（参考范文）：
我最喜欢的动物：
My favorite animal is the dolphin. Dolphins are very clever and friendly. They are the cleverest animals in the ocean. They are much smarter than sharks. Dolphins are also more playful than whales. They can jump high and do many tricks. I think dolphins are the most amazing animals because they are not as dangerous as sharks. They often help people in the water. Dolphins are also more beautiful than many other sea animals. Their bodies are smooth and their smiles are very cute. I hope I can see a real dolphin one day. They are truly the friendliest animals in the sea!
神奇的植物：
I think the most amazing plant is the rafflesia. It is the largest flower in the world. It is much bigger than a human head. It is larger than sunflowers and roses. The rafflesia is also the heaviest flower. However, it is not as beautiful as roses. In fact, it smells very bad! It is the worst smelling flower in the world. But I think it's very special because it is so rare. People travel from far away to see it. What a strange and amazing plant it is!
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