人教版（2024）2a-2d图片课件ppt

这是一份人教版（2024）2a-2d图片课件ppt，共30页。PPT课件主要包含了Summary等内容，欢迎下载使用。
In this unit, yu will1. talk abut hw things are different frm the past.2. discuss hw changes have influenced ur lives.3. find ut hw changes happened.4. explre what yu can d fr yur hmetwn.
Opening Page
Hw are these tw phts different?
The ld black and white pht shws empty wild land with nly a lnely tree and tw men, while the new clrful ne has wide winding rivers, thick plants and n peple, shwing great envirnmental changes.
Hw has this place changed ver time?
It used t be an empty land with nly ne tree. But nw it is cvered with rivers and green plants.
Why d yu think this place has changed s much?
I think peple must have taken sme measures t imprve the envirnment here. They planted many trees and prtected the river. Therefre , with their hard wrk, the land turns green and lively, and the envirnment became better and better.
What changes have taken place arund yu?
The rads used t be rugh and narrw . Nw they are smth and wide.
What can yu see in the left picture?What abut the right picture?Hw d yu feel abut these changes?
Hell everyne! My name is Li Rui, and I cme frm Yulin. Great changes have taken place in my hmetwn ver the years. Let me shw yu arund and take a lk at its amazing new lk!
The phts shw changes in Li Rui’s hmetwn ver the years. What are they? Hw d they make yu feel?
In the first pht, Li Rui’s hmetwn was very simple and dry with with few trees and buildings. But in the secnd ne, the twn has changed a lt. There are many tall green trees and new huses and clean rads. Nw, the whle place lks mre beautiful and mdern. I feel s happy and prud. These changes shw that the twn is develping well. Peple live a better life than befre.
Listen t a telephne cnversatin. Then answer the questins.
1. Why des Gerge call Li Rui?2. What is the relatinship between Gerge’s father and Li Rui’s grandfather?3. When did Gerge’s father last visit the place?
Because Gerge and his father are ging t visit Li Rui's hmetwn, and he wants Li Rui t be their guide.
1. Why des Gerge call Li Rui?
They are gd friends.
2. What is the relatinship between Gerge's father and Li Rui's grandfather?
Abut 20 years ag.
3. When did Gerge's father last visit the place?
Li Rui: Hell, Gerge.Gerge: Hi, Li Rui. Guess what? My father, Bb, and I are ging t visit yur hmetwn. Culd yu be ur guide?Li Rui: Sure! I’d lve t! Gerge: Wnderful! Yu knw, my father's last visit was abut 20 years ag.He became a gd friend f yur grandpa. Li Rui: Grandpa will be s happy. They haven’t seen each ther fr ages.Gerge: Yes, and my father really wants t see hw the place has changed since he last visited.
口语固定表达，意为 “你猜怎么着？”，用于引出令人惊喜的消息。
be ne’s guide 做某人的向导
fr ages = fr a lng time 很久、许久（口语常用）
since + 过去时间点 + 一段时间ag + 从句
Li Rui is nw shwing Gerge and his father arund her hmetwn. Listen t their cnversatin and cmplete the table.
half a day
40 minutes
any gd places
supermarket
beautiful trees
Li Rui: What d yu _________ yur trip s far?Bb: Amazing! When I first visited here, it _______ half a day t reach the twn. Nw, with the new rads, it takes nly an hur.Li Rui: Yes. When I was a child, the bus tk nearly 40 minutes ver ___________ t get t schl. Nw, it takes nly 15 minutes.Gerge: Life is much _________ !Li Rui: Nt nly that. We _________ have t travel far t see a dctr, but nw ur twn _________ a new hspital.
Listen again and fill in the blanks.
Bb: Great! And didn't I see a supermarket dwn the street?Li Rui: Yes. We didn't have any gd places fr shpping _____ 10 years ag.Bb: But the biggest change is n the hills. They used t ____ __________ sand.Li Rui: And nw they have been cvered with beautiful trees!
cvered with
Li Rui: What d yu think f yur trip s far?Bb: Amazing! When I first visited here, it tk half a day t reach the twn. Nw, with the new rads, it takes nly an hur.Li Rui: Yes. When I was a child, the bus tk nearly 40 minutes ver rugh rads t get t schl. Nw, it takes nly 15 minutes.Gerge: Life is much easier.Li Rui: Nt nly that. We used t have t travel far t see a dctr, but nw ur twn has built a new hspital.Bb: Great !And didn't I see a supermarket dwn the street?Li Rui: Yes, we didn't have any gd places fr shpping until 10 years ag.Bb: But the biggest change is n the hills.They used t be cvered with sand.Li Rui: And nw they have been cvered with beautiful trees.
=Hw d yu like…?
It takes(tk) sb. + 时间 + t d sth.表 “做某事花费某人多长时间”
with 表伴随，“有了……”
much + 形容词比较级：much easier 方便得多，much 用来加强比较级程度
used t d sth. 过去常常做某事（现在不再这样）
否定疑问句，口语中表确认：我刚才是不是看到街边有超市？
nt…until… 直到…… 才……
the biggest 最大的（形容词最高级）
be cvered with… 被…… 覆盖（一般过去时被动语态）
have been cvered 现在完成时被动（从种树到现在一直绿树覆盖）
Discuss the changes in 1c. Hw d yu think they happened?
Gd plicy and hard wrk bring changes.
planting trees
building hspitals
Rank the fllwing prblems frm 1 t 4, with 1 being the wrst. Give yur reasns.
difficult envirnment
farmland shrtage
lack f technlgy
I think … is the wrst because …
I rank the fur issues(问题) as: 1. difficult envirnment, 2. farmland shrtage, 3. sandstrms, 4. lack f technlgy.First, a difficult envirnment is the wrst because it ruins(毁坏) peple’s living cnditins(条件) and harms health fundamentally(从根本上). Next, farmland shrtage is very serius as it causes fd shrtages. Sandstrms cme third; they damage(损坏) land but nly happen ccasinally(偶尔). Lack f technlgy ranks last. Thugh it slws farming wrk, manual labur(体力劳动) can still supprt basic fd grwing, s it is the least urgent(紧急的) prblem.
Listen t the cnversatin between Gerge’s father and Li Rui’s grandfather.What prblems in 2a did they mentin?
They mentined sandstrms ...
Listen again and fill in the table. Hw has the envirnment affected lcal lives?
Bb: I’m amazed by hw green yur hmetwn has becme!Grandpa: Have yu seen the crn fields utside f the twn yet?Bb: Yeah! They’re huge!Grandpa: There used t be sandstrms all the time, and the fields were getting smaller and smaller. Then, after ne big sandstrm, we decided t d smething.Bb: What did yu d?Grandpa: We fund a small bush. It had lng rts that culd hld the sil tgether. We began planting it in sandy areas. The gvernment prvided supprt t.Bb: Was it difficult t plant s many bushes?Grandpa: Yes, it was. At the beginning, we wrked by hand. Later, we had machines t help. We have planted many bushes and trees since then. There are fewer sandstrms nw and the envirnment is getting better. It has als imprved ur lives. Everyne has becme richer and happier.
be amazed by… 对…… 感到惊叹、惊讶
hw 引导感叹式宾语从句，语序用陈述语序（主语 + 谓语）
后置定语：utside f the twn 修饰 crn fields
There used t be… 过去常常有……（现在没有了）
过去进行时 were getting，强调过去持续不断的变化
比较级叠加 smaller and smaller 越来越小
时间状语 after +n./V-ing
decide t d sth. 决定做某事make a decisin t d sth.
定语从句：that culd hld the sil tgether（that 指代 rts，从句修饰 rts）
begin ding sth. = begin t d sth. 开始做某事
It was + 形容词 + t d sth. 做某事是…… 的（一般过去时）
t help 不定式作目的状语，表 “用来帮忙”
fewer + 可数名词复数，更少的（few 比较级）
现在进行时 getting better，表环境持续变好；better 更好（gd 比较级）
Discuss hw the prblems in 2b were slved.
A: The area used t be cvered with sand.B: What did they d t slve this prblem?A: They planted bushes and trees. The land has becme ...
A: The area used t be cvered with sand, there were endless sandstrms and farmland was becming less and less.
B: What did they d t slve this prblem?
A: They planted bushes with lng rts t hld sil in sandy areas, and later used machines t plant lts f trees with gvernment supprt. The land has becme greener, crn fields are huge nw, sandstrms are far fewer and the envirnment gets much better.