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Unit 4 Plant life
单元重难点梳理
外研（三起）四年级
下
1
2
3
4
5
单词，词组过关
重点句型过关
语音过关
语法过关
专项练习
Listen and chant
1
单词，词组过关
stem
/ stem /
（植物的）茎，梗，柄
seed
/ si d /
根
leaf
/ li f /
叶，叶子（复数leaves）
/ ru t /
种子
root
1
单词，词组过关
sunflower
/ s nfla (r) /
向日葵
The sunflower grows in the earth. 向日葵生长在泥土里。
/ θ /
泥土，土壤
earth
1
单词，词组过关
wheat
/ wi t /
小麦
He is watering the wheat.
他正在给小麦浇水。
1
单词，词组过关
cotton
/ k tn /
棉花，棉株
She wants to pick cotton.
她想要摘棉花。
1
单词，词组过关
cabbage
/ k b d /
卷心菜，洋白菜
Do you like cabbage
你喜欢卷心菜吗？
1
单词，词组过关
mouse
/ma s /
老鼠
I am afraid of mouse.
我害怕老鼠。
1
单词，词组过关
grain
/grain /
谷粒
We get grain from plants.
我们从植物身上收获谷物。
1
单词，词组过关
paper
/ pe p (r) /
纸
My book is made of paper.
我的书是纸做的。
1
单词，词组过关
dig
/ d ɡ /
挖，掘
Why are you digging there
你为什么在那边挖（土）？
1
单词，词组过关
sleep
/sli p /
睡，睡觉
Is your cat sleeping now
你的小猫正在睡觉吗？
1
单词，词组过关
miss
/m s /
想念，思念，怀念（某人）
I miss my grandma very much.
我非常想念我的奶奶。
1
单词，词组过关
will
/w l /
将，会，要（用于构成将来时）
He will be 18 years old tomorrow.
他明天18岁了。
1
单词，词组过关
life
/ la f /
生活
My school life is happy.
我的学校生活很开心。
1
单词，词组过关
everything
/ evriθ /
每件事物；所有事物
Is everything OK
一切都还好吗？
1
单词，词组过关
thin
/ θ n /
细的，瘦的
He is very thin.
他很瘦
Phrases
in the earth 在泥土里 grow up 长大
sunflower seeds 向日葵种子 water thewheat 给小麦浇水
pick cotton摘棉花 stay with 和……待在一起
rice plant 水稻 come true 实现
Look and say
seed
sunflower
cabbage
life
root
leaf
earth
stem
wheat
grain
mouse
cotton
paper
dig
sleep
miss
will
thin
everything
2
重点句型过关
What are they doing
They are digging.
1. 询问某人正在做什么
-What are+主语（复数）+动词-ing 形式
-We're/They’re+动词-ing 形式（+其他）.
2
重点句型过关
Are the bananas getting yellow
No, they aren’t.
2.确认某些事物的动态
Are+某些事物+动词-ing 形式(+其他)
Yes, they are./ No, they aren’t.
2
重点句型过关
Why don't Sam's seeds grow
Because...
3. 询问某种情况没有发生的原因
Why do/does not +主语+动词原形(+其他)
答句通常为由 because引导的从句
点击图片进入练习环节
3
语音过关
e
/i:/
/i:/是长元音，发音时声带振动。舌尖抵下齿，舌前部尽力向口腔上壁抬起。双唇微微张开，呈扁平口形。
he
she
we
me
be
4
语法过关
语法一：动词-ing形式的变化规则
变化规则 例词
一般情况下，直接在动词词尾加-ing
以不发音的字母e结尾的动词，先去掉e，再加-ing
以重读闭音节结尾且末尾只有一个辅音字母的动词，双写末尾辅音字母，再加-ing
plant-planting
act-acting
make-making
ride-riding
swim-swimming
run-running
dig-digging
4
语法过关
语法二：How many, How much, How often的用法区别
1.how many 意为“多少”，后接可数名词复数，用来询问可数事物的数量。
2.how much ① 意为“多少”，后接不可数名词，用来询问不可数事物的量；
② 意为“多少钱”，用来询问价格。
3. how often 意为“多久”，用来询问频率。一般用once, twice, three time a day/week/month/year...等表示频率的词来回答。
4
语法过关
语法三： 情态动词will的用法
用于构成将来时，没有人称和数的变化，后接动词原形。
结构：主语 + will + 动词原形 (+ 其他)；否定形式：will not = won't
e.g: I think his dream will come true!
Trust him! He won’t be late for school tomorrow.
5
专项练习
一、判断句中单词画线部分发音是（T）否（F）相同。
（ ）1. He wants corn, but she wants carrots.
（ ）2. Yummy food comes from plants. Everything is so good.
（ ）3. Wow! The stem is red.
（ ）4. Plants can help us grow. We need them.
（ ）5. These beans are green. I want to eat them for breakfast.
T
F
T
F
F
二、选择合适的内容补全句子。
1. These__________ (seeds/seed) can’ t grow!
2. Everything__________ (is/are) so good.
3. Your dad is__________(makes/making) a garden for your family.
4. Thank you for__________(helping/help) us grow!
5. We use tomatoes__________(cook/to cook) noodles.
seeds
is
making
helping
to cook
三、Ms Smart带着同学们一起来到了菜园。根据情境，选择合适的选项补全对话。
A.Sam, are you digging the potatoes
B.Our food comes from plants.
C.Can we eat the leaves
D.What is the man doing
E.l want some tomatoes.
Ms Smart: Children, look! The vegetables in the garden grow well.
Li Ming: 1. ________
Ms Smart: He is watering the vegetables. Look at the potatoes. What part can we eat
Li Ming: 2. ________
Ms Smart: No, we can't. We can eat their stems.
Fangfang: 3.________
Sam: Yes, I am.
Ms Smart: Plants are useful. 4. _______ What do you want
Fangfang: 5. ________
D
C
A
B
E
四、看西红柿的生长过程，判断正（√）误（×）。
How does the tomato grow
Day 1
Day 7-10
Day 30-50
Day 50-70
Day 90-120
“I am a seed”
“I am small and green”
“I am tall and green”
“Now, I am a yellow flower”
“I grow up, people pick me up.”
Things I need:
air, water, soil, sunlight
(1) On Day 7, the tomato is a seed and says "I am a seed." （ ）
(2) When the tomato is 45 days old, it is tall and green. （ ）
(3) Tomatoes need air, water and the sun to grow. （ ）
(4) When the tomato is 70 days old, people will pick it up. （ ）
(5) This passage is about plants around us. （ ）
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