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仁爱科普版九年级上册Topic 2 All these problems are very serious.教学课件ppt
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这是一份仁爱科普版九年级上册Topic 2 All these problems are very serious.教学课件ppt，文件包含51Unit2Topic2SectionA课件ppt、p35-1amp3、p36-4-Amp3、p36-4-Bmp3、p35-1awmv、pollution1mp4等6份课件配套教学资源，其中PPT共37页， 欢迎下载使用。
Watch the vide and see what happened t ur earth.
New wrds
1.sand [sænd] n. 沙2.sandstrm [ˈsændstɔ:m] n. 沙暴3.change int 转换成，变成（turn int)4.desert [ˈdezət] n. 沙漠 v. 舍弃，遗弃5.human being 人6.althugh [ɔ:lˈðəu] cnj. 虽然，尽管，即使7.reduce [rɪˈdju:s] v. 减少，减轻
many trees
Use the new wrds
快速抢答，你准备好了吗？
1. H_____________have cut dwn many trees.
uman beings
wash the earth away
2. The frests have gne and the rain washes the earth away.
Use the new wrds
3. A lt f rich land has ____________ desert because peple have cut dwn t many trees.
Use the new wrds
changed int
Use the new wrds
4. As a result, s_________ cme int being.
Task 1. D yu knw hw sandstrms cme int being? Number the pictures and talk abut the sandstrm in grups.
change int desert
sandstrms cme int being
cut dwn trees
The by and girls are talking abut —————.different types f sandstrms the reasns fr sandstrms sandstrms in different cities
Task 2. Listen t 1a and chse the best answer.
Task 3. Listen t 1a again and fill in the blanks.
Task 4. Read 1a and cmplete trees’ functins.
Trees can stp the wind frm blwing the earth away. A lt f water can be saved by frests. They can als stp the water frm washing the earth away.
Tree’s functins
1.What bad weather! 译：总结：What引导的感叹句--- a. What+形容词+不可数名词/可数名词复数！ b. What+ a/an+形容词+可数名词单数！
Task 5. Language pints
练习：1）多么繁忙的一天呀！ 2）多么大的雪呀！ 3）多么艰苦的工作呀！ 4）多么美丽的花呀！
What a busy day!
What heavy snw!
What hard wrk !
What beautiful flwers!
2.As a result, a lt f rich land has changed int desert.译:change …int把…变成…= turn… int练习：1)加热能使水变成蒸汽。Heat _____ _____ water ________ steam. 2)他们正在使沙漠变成农田。They ______ ________ desert ______field.3)Culd yu change this article int English? 译：
结果，很多肥沃的土地变成了沙漠。
你能把这片文章翻译成英语吗？
3.Trees can als stp the wind frm blwing the earth away. 译： They can als prevent the water frm washing the earth away. 译： 点拨：stp sb./sth. (frm) ding sth. = prevent sb./sth. (frm) ding sth. 阻止…做某事 (frm可以省略) 链接：同义词组 keep sb./sth. frm ding sth. --- 阻止…做某事（frm不能省略）
它们还能够防止土壤被水流冲走。
练习：1)大雨使我们无法外出。a. b. c.
The heavy rain prevented us frm ging ut.
The heavy rain stpped us frm ging ut.
The heavy rain kept us frm ging ut.
4.Cutting dwn trees is harmful t human beings, animals and plants. 译：思考：cutting dwn trees是________词短语在句子中作______语，谓语用______数。练习：1)散步是我的爱好。 ______ ______my hbby. 2)打乒乓球很有意思。 _____ ______ ____ great fun. 3)阅读使人完美。 ______ _____a man _______.
滥伐树木对人类动植物都有害处。
5.Althugh we have built “The Great Green Wall”, we still need t wrk hard t prtect the envirnment. 译： 点拨：althugh 是 _____ 词，有“虽然，尽管”和“不过，然而”两层意思，引导____ 状语从句，可以和 ______ 互换，althugh 较正式，__________ 更为口语化，使用更普遍些。 注意：althugh 引导的从句不能与but, hwever同时连用， 但常与yet, still 连用。
尽管我们已经建了“绿色长城”,但是还需要做些事情来保护环境。
a.虽然他老了，但是他仍然继续努力工作。_________ he_____ ld, he still _________ wrking hard. b.当时我觉得她错了,不过我什么也没说。_________ I _______ she was wrng at that time, I ______ _______.
Althugh/Thugh
smebdy, smene, smething, smewhere anybdy, anyne, anything, anywhere nne, nbdy, nthing, nwhere everybdy, everyne, everything, everywhere
一般情况下用于否定句和疑问句
the indefinite prnun and adverb
Everything begins t grw in spring.Smething is wrng with the bus.Everybdy likes her.
不定代词作主语时, 谓语动词一般要用单数形式
There is smething wrng with the clck.There’s nthing new in tday’s newspaper.D yu have anything t drink?
形容词、动词不定式修饰不定代词、副词时，应置于不定代词、副词之后
Everyne is in the hall, ___________?Everything ges well, ___________?
aren’t they
在反义疑问句中，表示人的不定代词作主语时，其反义疑问句的主语通常用they；当句子中的主语是指物的不定代词时，其反义疑问句的主语通常是代词it。
1.I have ____ t tell yu.A. imprtant smethingB. smething imprtant
形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后
2.Everybdy ___ ready fr the match.A. is B. are
不定代词作主语时，谓语动词要用单数。
K: wind; sand; anything M: sandstrms J: cut dwn; as a result; change int M: affect J: stp…frm…; blw… away K: can be saved J: wash … away K: is harmful t; althugh; d smething
Task 6. Act ut the dialg in pairs
Task 7.Cmplete the sentences with the crrect frms f the given phrases in the bx.
as a result, change int, d smething, stp…frm, blw…away
1.Peple have cut dwn such a large number f trees that the land ___________________ __ desert. 2.There are fewer trees left, s the wind always _______ the earth ________. 3.Air pllutin has becme a serius prblem, s we must ______________ t reduce it. 4.we shuld try ur best t _________ peple ________ cutting dwn the trees. 5.In the future, human beings can prtect the trees well. _____________, animals will live a happy life in the frest.
has changed int
As a result
Task 8. A. Listen t the passage and circle the phrases yu hear.
becme weakerdestry the envirnmentdisappear rapidlyn the earthenugh bamb t eat
B. Listen again and fill in the blanks.
1. Nw sme kinds f animals are becming ______ ______ _______.2. Sme animals are_____ ______ ____dying ut cmpletely.3. In the past, pandas lived a quiet life and had ________ ______fd.4. Humans have _____ _____ __________ the imprtance f prtecting animals.5. We shuld ______ ______ ____t prtect them.
d ur best
in danger f
cme t understand
fewer and fewer
1. Sme wrds: sand, althugh 2.Sme phrases: change int, human being 3.Sme sentences: (1)As a result, a lt f rich land has changed int desert. (2)Trees can stp the wind frm blwing the earth away.
1. Use the indefinite prnun and adverb. 2.Talk abut the sandstrm and its harm.
Lily, wuld yu like ___________ t drink? Cindy is very busy nw. She needs _______ t help her. Is there _________ wrng with yur cmputer?Jim lked fr his pencil-bx ____________ , but he didn’t find it. I stayed at hme last week. I didn’t g __________.
Use smene, smething, anything, smewhere, anywhere t fill in the blanks.
1. Our teacher have tld us ___ the trees. A. cut ff B. cut dwn C. nt t cut ff D. nt t cut dwn2. ____ they can swim, ____ they never g swimming alne. A. Althugh, but B. Thugh, but C. Althugh, / D. Because, s
3. The plicemen tried t prevent traffic accidents _____ happening. A. frm B. in C. t D. with 4. He didn’t crss the rad until the red traffic lights changed ____ green nes. A. t B. int C. fr D. in 5. _____ bad weather! We have t stay at hme. A. What a B. Hw C. Hw a D. What
Read 1a.Memrize the useful expressins and key sentences which we learn tday.Finish Sectin A in yur wrkbk.Preview Sectin B.
Watch the vide and see what happened t ur earth.
New wrds
1.sand [sænd] n. 沙2.sandstrm [ˈsændstɔ:m] n. 沙暴3.change int 转换成，变成（turn int)4.desert [ˈdezət] n. 沙漠 v. 舍弃，遗弃5.human being 人6.althugh [ɔ:lˈðəu] cnj. 虽然，尽管，即使7.reduce [rɪˈdju:s] v. 减少，减轻
many trees
Use the new wrds
快速抢答，你准备好了吗？
1. H_____________have cut dwn many trees.
uman beings
wash the earth away
2. The frests have gne and the rain washes the earth away.
Use the new wrds
3. A lt f rich land has ____________ desert because peple have cut dwn t many trees.
Use the new wrds
changed int
Use the new wrds
4. As a result, s_________ cme int being.
Task 1. D yu knw hw sandstrms cme int being? Number the pictures and talk abut the sandstrm in grups.
change int desert
sandstrms cme int being
cut dwn trees
The by and girls are talking abut —————.different types f sandstrms the reasns fr sandstrms sandstrms in different cities
Task 2. Listen t 1a and chse the best answer.
Task 3. Listen t 1a again and fill in the blanks.
Task 4. Read 1a and cmplete trees’ functins.
Trees can stp the wind frm blwing the earth away. A lt f water can be saved by frests. They can als stp the water frm washing the earth away.
Tree’s functins
1.What bad weather! 译：总结：What引导的感叹句--- a. What+形容词+不可数名词/可数名词复数！ b. What+ a/an+形容词+可数名词单数！
Task 5. Language pints
练习：1）多么繁忙的一天呀！ 2）多么大的雪呀！ 3）多么艰苦的工作呀！ 4）多么美丽的花呀！
What a busy day!
What heavy snw!
What hard wrk !
What beautiful flwers!
2.As a result, a lt f rich land has changed int desert.译:change …int把…变成…= turn… int练习：1)加热能使水变成蒸汽。Heat _____ _____ water ________ steam. 2)他们正在使沙漠变成农田。They ______ ________ desert ______field.3)Culd yu change this article int English? 译：
结果，很多肥沃的土地变成了沙漠。
你能把这片文章翻译成英语吗？
3.Trees can als stp the wind frm blwing the earth away. 译： They can als prevent the water frm washing the earth away. 译： 点拨：stp sb./sth. (frm) ding sth. = prevent sb./sth. (frm) ding sth. 阻止…做某事 (frm可以省略) 链接：同义词组 keep sb./sth. frm ding sth. --- 阻止…做某事（frm不能省略）
它们还能够防止土壤被水流冲走。
练习：1)大雨使我们无法外出。a. b. c.
The heavy rain prevented us frm ging ut.
The heavy rain stpped us frm ging ut.
The heavy rain kept us frm ging ut.
4.Cutting dwn trees is harmful t human beings, animals and plants. 译：思考：cutting dwn trees是________词短语在句子中作______语，谓语用______数。练习：1)散步是我的爱好。 ______ ______my hbby. 2)打乒乓球很有意思。 _____ ______ ____ great fun. 3)阅读使人完美。 ______ _____a man _______.
滥伐树木对人类动植物都有害处。
5.Althugh we have built “The Great Green Wall”, we still need t wrk hard t prtect the envirnment. 译： 点拨：althugh 是 _____ 词，有“虽然，尽管”和“不过，然而”两层意思，引导____ 状语从句，可以和 ______ 互换，althugh 较正式，__________ 更为口语化，使用更普遍些。 注意：althugh 引导的从句不能与but, hwever同时连用， 但常与yet, still 连用。
尽管我们已经建了“绿色长城”,但是还需要做些事情来保护环境。
a.虽然他老了，但是他仍然继续努力工作。_________ he_____ ld, he still _________ wrking hard. b.当时我觉得她错了,不过我什么也没说。_________ I _______ she was wrng at that time, I ______ _______.
Althugh/Thugh
smebdy, smene, smething, smewhere anybdy, anyne, anything, anywhere nne, nbdy, nthing, nwhere everybdy, everyne, everything, everywhere
一般情况下用于否定句和疑问句
the indefinite prnun and adverb
Everything begins t grw in spring.Smething is wrng with the bus.Everybdy likes her.
不定代词作主语时, 谓语动词一般要用单数形式
There is smething wrng with the clck.There’s nthing new in tday’s newspaper.D yu have anything t drink?
形容词、动词不定式修饰不定代词、副词时，应置于不定代词、副词之后
Everyne is in the hall, ___________?Everything ges well, ___________?
aren’t they
在反义疑问句中，表示人的不定代词作主语时，其反义疑问句的主语通常用they；当句子中的主语是指物的不定代词时，其反义疑问句的主语通常是代词it。
1.I have ____ t tell yu.A. imprtant smethingB. smething imprtant
形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后
2.Everybdy ___ ready fr the match.A. is B. are
不定代词作主语时，谓语动词要用单数。
K: wind; sand; anything M: sandstrms J: cut dwn; as a result; change int M: affect J: stp…frm…; blw… away K: can be saved J: wash … away K: is harmful t; althugh; d smething
Task 6. Act ut the dialg in pairs
Task 7.Cmplete the sentences with the crrect frms f the given phrases in the bx.
as a result, change int, d smething, stp…frm, blw…away
1.Peple have cut dwn such a large number f trees that the land ___________________ __ desert. 2.There are fewer trees left, s the wind always _______ the earth ________. 3.Air pllutin has becme a serius prblem, s we must ______________ t reduce it. 4.we shuld try ur best t _________ peple ________ cutting dwn the trees. 5.In the future, human beings can prtect the trees well. _____________, animals will live a happy life in the frest.
has changed int
As a result
Task 8. A. Listen t the passage and circle the phrases yu hear.
becme weakerdestry the envirnmentdisappear rapidlyn the earthenugh bamb t eat
B. Listen again and fill in the blanks.
1. Nw sme kinds f animals are becming ______ ______ _______.2. Sme animals are_____ ______ ____dying ut cmpletely.3. In the past, pandas lived a quiet life and had ________ ______fd.4. Humans have _____ _____ __________ the imprtance f prtecting animals.5. We shuld ______ ______ ____t prtect them.
d ur best
in danger f
cme t understand
fewer and fewer
1. Sme wrds: sand, althugh 2.Sme phrases: change int, human being 3.Sme sentences: (1)As a result, a lt f rich land has changed int desert. (2)Trees can stp the wind frm blwing the earth away.
1. Use the indefinite prnun and adverb. 2.Talk abut the sandstrm and its harm.
Lily, wuld yu like ___________ t drink? Cindy is very busy nw. She needs _______ t help her. Is there _________ wrng with yur cmputer?Jim lked fr his pencil-bx ____________ , but he didn’t find it. I stayed at hme last week. I didn’t g __________.
Use smene, smething, anything, smewhere, anywhere t fill in the blanks.
1. Our teacher have tld us ___ the trees. A. cut ff B. cut dwn C. nt t cut ff D. nt t cut dwn2. ____ they can swim, ____ they never g swimming alne. A. Althugh, but B. Thugh, but C. Althugh, / D. Because, s
3. The plicemen tried t prevent traffic accidents _____ happening. A. frm B. in C. t D. with 4. He didn’t crss the rad until the red traffic lights changed ____ green nes. A. t B. int C. fr D. in 5. _____ bad weather! We have t stay at hme. A. What a B. Hw C. Hw a D. What
Read 1a.Memrize the useful expressins and key sentences which we learn tday.Finish Sectin A in yur wrkbk.Preview Sectin B.
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