初中仁爱科普版Topic 3 The world has changed for the better.教学ppt课件
展开《Earth Sng 》
Casual Talk: T: What can yu see in the MV? Hw d yu feel? What shuld we d? ……
What des he want t tell us?
He tells us the imprtance f prtecting the earth and calls n us t stp distrying the earth .
Hw imprtant is the frest?
Frests are the lungs f the earth.
Remve carbn dixide frm the air
Task 1. Listen t the passage.
Paragraph 1:___________________________________Paragraph 2:______________________________________________________________________Paragraph 3:___________________________________
Frests are the lungs f the earth
These yung men and wmen face many difficulties when they plant new trees.
Tree planters are changing the wrld.
Task 2. Read 1a quickly and find ut the tpic sentence f each paragraph.
Task 3. Clse yur textbks and decide which f the fllwing sentences is true“T”r false“F”.1. Frests are the hearts f the earth. ( )2. In many cuntries, frests were cut dwn t make mney.( )3. These yung men and wmen face many difficulties when they plant new trees. ( )4. Even thugh tree planting is very difficult, they lve their wrk.( )
1.Hw d yu understand “Frests are the lungs f the earth”?2.What difficulties d tree planters face when they plant trees ?3.Why d they plant different kinds f trees ?
Task 4. Detail reading
Hw d yu understand “Frests are the lungs f the earth”?
Frests can remve carbn dixide frm the air and make xygen.
Paragraph 1
What difficulties d tree planters facewhen they plant trees ? (1)The weather may be very ht and dry r it may be very cld and wet. (2)There are ften many insects that bite these planters n their legs, arms, and faces while they wrk. (3)They carry heavy bags f small trees, and wrking in the muntains can be dangerus.
Paragraph 2
adj.干燥的,雨少的,干性的v. 使……干,弄干,擦干
Why d they plant different kinds f trees ?They plant different types f trees s thatbirds and animals can live in the frests.
Paragraph 3
What will happen if we d nt plant new frests ? The frests will becme less and less. We cannt breathe withut them.
Have a try
Task 5.Retell the passage.Frests are the_______f the earth. Withut them, it cannt _______. It needs its frests t remve _______ frm the air and t make _______. In many cuntries, such as New Zealand, Canada, and Brazil, frests were _______ t prvide wd t _______. Many yung vlunteers arund the wrld are wrking in their hlidays t _______ t replace them.
(1)Even thugh tree planting is very difficult, they lve their wrk.(2)The weather may be very ht and dry r it may be very cld and wet. (3)There are ften many insects that bite these planters n their legs, arms, and faces while they wrk.
Task 6. Language pints
even thugh/even if意为:能与but 连用吗?即使我得步行,我还是要到那儿。
不能(在英语中,虽然不与但是连用;因为不与所以连用)
I'll get there,even if I have t walk.
一、并列句的概念: 并列句是由并列连词and, but, r, fr, s等把两个或两个以上互不依从,但意思紧密联系的简单句连在一起而构成的句子。其结构为:简单句+并列连词+简单句。
Cmpund Sentence (并列句)
and(和,而且), bth…and, nt nly…but als(不但...而且), as well as(也,和...一样)neither…nr(即不..也不..)等
r(或者;否则), either…r(要么...要么)等
but(但是), hwever(然而,可是), while (而,着重表对照关系)(不是...而是)等
fr(由于), s(因此)等
Task 7. Grammar & Functin
( ) 1. Help thers whenever yu can _____ yu’ll make the wrld a nicer place t live in. A. r B. and C. but D. while( )2. Crss the rad carefully, ________ yu’ll keep yurself safe . A. s B. r C. but D. and ( ) 3. Hurry up, ________ yu’ll be late fr the cncert . A. r B. s C. but D. and ( ) 4. ---Tell us smething abut Canada, OK? --- I’m srry. ________ Jack _______ I have ever been there. A. Either, r B. Nt nly, but als C. Bth, and D. Neither, nr ( ) 5. I always enjy visiting Lndn, ______ I wuldn’t like t live there. A. because B. s C. but D. and
1. Sme wrds: dry 2. Sme phrases: prvide sth. t d sth.; face difficulties; even thugh 3. Sme sentences: (1)Withut them, it cannt breathe. (2)They plant different types f trees s that birds and animals can live in the frests.
1. Use the cmpund sentence crrectly. 2. Realize the imprtance f the frest.
( ) 1. Help thers whenever yu can _____ yu’ll make the wrld a nicer place t live in. A. r B. and C. but D. while( )2. Crss the rad carefully, ________ yu’ll keep yurself safe . A. s B. r C. but D. and ( ) 3. Hurry up, ________ yu’ll be late fr the cncert . A. r B. s C. but D. and
( ) 4. ---Tell us smething abut Canada, OK? --- I’m srry. ________ Jack _______ I have ever been there. A. Either, r B. Nt nly, but als C. Bth, and D. Neither, nr ( ) 5. I always enjy visiting Lndn, ______ I wuldn’t like t live there. A. because B. s C. but D. and
( )6. There are many sprts lvers in his ffice. Sme lve climbing, ____ thers enjy swimming. A. Or B. frC. whileD. s( ) 7. ___ she ___ I knw his telephne number, because it has been changed. A. Bth; and B. Either; r C. Nt nly; but als D. Neither; nr
Read 1a.Memrize the useful expressins and key sentences which we learn in this tpic.Finish Sectin D in yur wrkbk.Review what we learn in this unit.
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