内容正文:
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Unit 4 Plant life
小学英语
外研版 (三起) 四年级下册
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04 Tips & Practice
03 Sentences
02 Words & Phrases
01 Sounds & Letters
Contents
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01 Sounds & Letters
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字母e的发音
发音小秘密:
字母 e 在单词中发 /i:/ 的音
he (他)
she (她)
we (我们)
me (我)
be (是)
/i:/
/i:/
/i:/
/i:/
/i:/
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句子的语调
特殊疑问句
(问种植动作/植物部位)
语调规则:
降调 (声音从高到低)
例句示范:
What are you doing?
(你在做什么?)
一般疑问句
(确认植物生长)
语调规则:
升调 (声音从低到高)
例句示范:
Are the seeds growing?
(种子在生长吗?)
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02 Words & Phrases
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Words:(植物部位类)
seed
种子
root
根
stem
茎
leaf
叶子
flower
花
grain
谷粒
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Words:(植物部位类)
wheat
小麦
cotton
棉花
sunflower 向日葵
lettuce
生菜
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Words:(动作类)
dig
挖掘
plant
种植
water
浇水
grow
生长
pick
采摘
make
制作
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Words:(动作类)
watch
观察
sleep
睡觉
miss
想念
feed
喂养
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Words:(其他类)
earth
泥土
life
生活;生命
everything
所有事物
cabbage
卷心菜
paper
纸
mouse
老鼠
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Words:(其他类)
dream
梦想
come true
实现
slowly
缓慢地
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Phrases(一)
put……in……
把……放在……里
watch me grow
看我成长
get big
变大
parts of a plant
植物的部位
grow up
长大
in the sun
在太阳下
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Phrases(二)
make a garden
做花园
plant seeds
播种
dig the earth
挖泥土
water the plants
给植物浇水
grow tall
长得高
pick cotton
摘棉花
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Phrases(三)
work in the field
在田地里工作
stay with...
和……待在一起
work hard
努力工作
come from plants
来自植物
feed the world
养活世界
want to do
想要做
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Phrases(四)
thank you for...
因……而感谢你
use of plants
植物的用处
make paper
造纸
a plant journal
植物观察日记
how often
多久一次
make chairs
制作椅子
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Phrases(五)
how many
多少
once a day
一天一次
grow into
长成
look after plants
照顾植物
six hours a day
一天六小时
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03 Sentences
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1.询问正在进行的种植动作:
—What are you doing? 你们正在做什么?
—We're + 动词 - ing(种植相关). 我们正在……
例:—What are you doing? 你们正在做什么?
—We're digging the earth. 我们正在挖泥土。
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2.询问植物部位 / 生长情况:
—What part of the plant is it? 这是植物的哪个部位?
—It's a/an + 植物部位。它是……
例:—What part of the plant is it? 这是植物的哪个部位?
—It's a root. 它是根。
—Are the seeds growing? 种子在生长吗?
—Yes, they are. / No, they aren't.
是的,它们在生长。/ 不,它们没有。
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3.描述植物生长过程:
—The + 植物部位 + grows into + 植物 / 部位. …… 长成……
例:The seed grows into a small plant.
种子长成了一株小植物。
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4.描述植物用途:
—We use plants to + 动词原形。我们用植物来……
例:We use plants to make paper. 我们用植物来造纸。
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5.祈使句(种植相关指令):以动词原形开头的句子!
—What are you doing? 你们正在做什么?
—We're + 动词 - ing(种植相关). 我们正在……
—Put the seed in the earth. 把种子放进泥土里。
—Water the plant every day. 每天给植物浇水。
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核心语法
现在进行时
表示当前正在进行的种植动作
结构:主语 + am/is/are + 动词 - ing
名词单复数
植物部位的复数变化
leaf→leaves, seed→seeds, root→roots
use 句型
表示用某物做某事。
结构:use sth. to do sth.
一般现在时
描述植物生长规律 / 用途
主语为单数时动词用第三人称单数
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04 Tips & Practice
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考点一: 现在进行时(种植相关动作)
结构:主语 + be (am/is/are) + 动词-ing
用于描述正在进行的种植动作
(dig→digging, plant→planting, water→watering, pick→picking)。
第一人称(I/we)用 am/are,第三人称单数(he/she/it)用 is,复数主语用 are。
否定式:主语 + am/is/are + not + 动词 - ing;一般疑问句:Am/Is/Are + 主语 + 动词 - ing?
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例如:
—What are they doing? 他们正在做什么?
—They're planting sunflower seeds.
他们正在种向日葵种子。
—Is he watering the wheat?
他正在给小麦浇水吗?
—Yes, he is. 是的,他正在浇。
考点一: 现在进行时(种植相关动作)
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【拓展】
动词- ing 变化规则(本单元重点):
1.直接加 - ing:
water→watering pick→picking grow→growing
2.重读闭音节双写尾字母加 - ing:
dig→digging sit→sitting(补充)
3.不发音 e 结尾去 e 加 - ing:
make→making take→taking(补充)
考点一: 现在进行时(种植相关动作)
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提分练
一、单项选择。
( ) 1. —What ____ you doing? —We ____ digging the earth.
A.are; are B. do; are C. are; is
( )2. —What ____ Amy doing?—She ____ planting lettuce seeds.
A.is; is B. does; is C. are; is
( )3. —Is Tom ____ the cotton?—No, he isn't. He's watering the plants.
A.pick B. picking C. picks
( )4. They ____ not growing flowers. They're growing vegetables.
A.are B. do C. is
( )5. —____ your father planting trees?—Yes, he ____.
A. Do; do B. Is; is C. Are; are
A
A
B
A
B
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提分练
二、按要求完成句子。
1.We are planting bean seeds.(对画线部分提问)
______ ______ you ______?
2.She is watering the sunflowers.(改为否定句)
She ______ ______ the sunflowers.
3.Are they picking cotton?(作肯定回答)
______, ______ ______.
4.He is digging the earth.(改为一般疑问句)
______ ______ digging the earth?
5.The students are making a small garden.(对画线部分提问)
______ ______ the students ______?
What
are
doing
isn’t
watering
Yes
they
are
Is
he
What
are
doing
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考点二:植物部位的询问与表达
考点讲解
询问植物部位用 “What part of the plant is it?”,答句用 “It's a/an + 植物部位名词”。
植物部位名词的单复数变化:leaf→leaves(特殊变化),seed→seeds,root→roots,stem→stems,flower→flowers。
描述植物部位特征:用形容词修饰(thin stem 细茎,green leaves 绿叶,big grains 大谷粒)。
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考点二:植物部位的询问与表达
—These are roots. They're under the earth.
这些是根,它们在泥土下面。
—The stem is thin and strong.
茎又细又结实。
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考点二:植物部位的询问与表达
【拓展】
常用植物部位搭配:
yellow flower 黄花,small seed 小种子,long root 长根,green leaf 绿叶。
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提分练
一、单项选择。
( ) 1. —What part of the plant is it?—It's a ___. It's under the earth.
A.stem B. root C. flower
( )2. The ___ are green. They make food for the plant.
A.leaf B. leaves C. leafs
( )3. —What are these?—They're ___. The plant grows from them.
A.seeds B. stem C. grain
( )4. This is a ___. It's thin and grows upwards.
A.root B. flower C. stem
( )5. The ___ is yellow. It's beautiful.
A. leaves B. flower C. roots
B
B
A
C
B
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提分练
二、用所给单词的适当形式填空。
1.There are many ______ (leaf) on the tree.
2.The ______ (seed) are small and brown.
3.This ______ (root) is long and strong.
4.The ______ (flower) are red and pink.
5.The ______ (stem) of the sunflower is tall.
leaves
seeds
root
flowers
stem
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考点三: 名词单复数(植物相关)
规则变化:大部分植物部位名词直接加- s(seed→seeds, root→roots, stem→stems, flower→flowers ,grain→grains)
不规则变化:leaf→leaves(把 f/fe 变 v 加 - es)
主谓一致:单数名词作主语时,be 动词用 is,实义动词用第三人称单数;复数名词作主语时,be 动词用 are,实义动词用原形。
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第四个考点是一般现在时。它用来表示经常发生的动作或者客观事实。要注意当主语是第三人称单数时,动词要加-s或-es。比如,He waters the plants every day. 他每天给植物浇水。大家来做一做练习题吧。
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考点三: 名词单复数(植物相关)
The seeds are small. 这些种子很小。(复数)
The leaf turns yellow in autumn.
叶子在秋天变黄。(单数)
The leaves turn yellow in autumn.
叶子们在秋天变黄。(复数)
【拓展】
类似不规则变化的名词:
knife→knives(小刀),wife→wives(妻子)
与 leaf 变化规则一致。
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第四个考点是一般现在时。它用来表示经常发生的动作或者客观事实。要注意当主语是第三人称单数时,动词要加-s或-es。比如,He waters the plants every day. 他每天给植物浇水。大家来做一做练习题吧。
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提分练
一、单项选择。
( ) 1. The ______ is big. It can grow into a tall plant.
A.seed B. seeds C. seedes
( )2. —Are these ______?—Yes, they are. They're green.
A.leaf B. leaves C. leafs
( )3. The ______ of the wheat are golden.
A.grain B. grains C. graines
( )4. This ______ is thin. Those ______ are thick.
A.stem; stem B. stems; stem C. stem; stems
( )5. The ______ are beautiful. I like pink flowers.
A. flower B. flowers C. floweres
A
B
B
C
B
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植物长出了茎和叶子,就像穿上了绿色的衣服!叶子在阳光下进行光合作用,为植物制造生长所需的营养,让它茁壮成长!
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提分练
二、判断句子正(T)误(F),错误的请改正。
1.The leafs are green. ( ) ______
2.These seed are small. ( ) ______
3.The stems is tall. ( ) ______
4.Those flowers is red. ( ) ______
5.This root is long. ( ) ______
F
The leaves are green.
F
These seeds are small.
F
The stems are tall.
F
Those flowers are red.
T
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植物长出了茎和叶子,就像穿上了绿色的衣服!叶子在阳光下进行光合作用,为植物制造生长所需的营养,让它茁壮成长!
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考点四:use sth to do sth(植物用途)
句型结构:use sth. to do sth.
含义:表示“某人用某物做某事”
否定式:
主语 + don't/doesn't use + 某物 + to + 动词原形
(主语为第三人称单数时用 doesn't)。
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考点四:use sth to do sth(植物用途)
Farmers use seeds to grow crops.
农民用种子来种庄稼。
People don't use flowers to make bread.
人们不用花来做面包。
【拓展】
同义句型:use sth. for doing sth.(后接动词- ing),
与 use sth. to do sth. 可互换。
例:We use plants for making paper. = We use plants to make paper.
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提分练
一、单项选择。
( ) 1. We use cotton ______ clothes.
A.make B. to make C. making
( )2. People use wheat ______ bread.
A.to make B. make C. making
( )3. Farmers use water ______ plants.
A.to water B. water C. watering
( )4. We ______ use flowers to feed animals.
A.don't B. doesn't C. aren't
( )5. They use leaves ______ tea.
A. make B. to make C. makes
B
A
A
A
B
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提分练
二、按要求完成句子。
1.We use plants to make chairs.(对画线部分提问)
______ do you use plants ______ ______?
2. People use wheat to make noodles.(改为否定句)
People ______ ______ wheat to make noodles.
3.Farmers use seeds to grow rice.(改为一般疑问句)
______ farmers ______ seeds to grow rice?
4.We use cotton to make T-shirts.(同义句转换)
We use cotton ______ ______ T-shirts.
5.They use flowers to make perfume.(对画线部分提问)
______ ______ they use to make perfume?
What
to
do
don’t
use
Do
use
for
making
What
do
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考点五:描述植物生长过程
常用句型:The + 前一阶段 + grows into + 后一阶段(用一般现在时表示生长规律)。
常用动词:grow(生长),become(变成),turn(变成),come out(发芽),bloom(开花)。
时间状语:every day,in spring,after two weeks 等,体现生长的时间进程。
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考点五:描述植物生长过程
例如:
The seed grows into a seedling. 种子长成幼苗。
The seedling grows into a small plant.
幼苗长成小植物。
After two months, the plant blooms.
两个月后,植物开花了。
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考点五:描述植物生长过程
【拓展】
生长过程常用顺序词:
first(首先),then(然后),next(接下来),finally(最后)。
例:First, put the seed in the earth. Then water it. Next, wait for it to grow. Finally, it blooms.
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提分练
一、单项选择。
( ) 1. The seed ______ into a small plant.
A.grow B. grows C. growing
( )2. First, we put the seed in the earth. ______, we water it.
A.Then B. Finally C. First
( )3. After three weeks, the seedling ______ into a big plant.
A.become B. becomes C. becoming
( )4. The flower ______ red in summer.
A.turn B. turns C. turning
( )5. Finally, the plant ______ many seeds.
A. make B. makes C. making
B
A
B
B
B
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提分练
二、连词成句。
1.seed The into grows a plant (.)
______________________________________________________
2.first We earth the put seed in the (.)
______________________________________________________
3.turns The green leaf (.)
______________________________________________________
4.grows Finally many plant seeds the (.)
______________________________________________________5.water Then we it (.)
______________________________________________________
The seed grows into a plant.
First we put the seed in the earth.
The leaf turns green.
Finally the plant makes many seeds.
Then we water it.
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Thank you!
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