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八年级英语Pollution Fighters教案2,
产生足够的氧气供你们全班学生一年时间的存活和健康成长
22. Trees cool the air as well as clean it.
as well as... = besides / in addition to
e.g. On Sundays， his farm provided lunch as well as breakfast.
It is important for you as well as for me.
Father as well as his children hasn‘t been to Euro Disney. (远离原则)
William Shakespeare was an actor as well as a play writer. (强调前者)
= William Shakespeare was not only a play writer but (also) an actor. (强调后者)
23. Three trees can do the jobs of 15 air conditioners running (=as they are running ) almost all day.
24. know a lot about trees
25. attack a tree 攻击树 attract one‘s attention引起某人注意
26. warn its neighbors
27. warn sb of sth./sb warn sb against doing sth
?e.g. The policeman warned us against running across the road.警察警告我们不要跑着过马路。
? They warn people against destroying trees. 他们警告人们不要破坏树木。
28. protect themselves by producing a chemical 通过产生一种化学物质保护他们自己
29. chemistry (n.) / chemical (adj./n.) / chemist (n.)
Exercises： 1) 一个化学实验 a ＿＿＿＿＿＿＿＿＿＿＿ experiment
2) 一个化学工厂 a ＿＿＿＿＿＿＿＿＿＿＿ factory
3) 化学是她在学校时最好的科目 ＿＿＿＿＿＿＿＿＿＿＿ is her favorite subject at school.
4) 奇怪的化学反应使两个人相爱了. A strange ＿＿＿＿＿＿ makes two people fall in love.
5) 他去药房买药。 He went to the ＿＿＿＿＿＿＿＿＿＿＿＿ to buy some medicine.
30. make their leaves taste nasty 使得树叶尝起来味道很糟
31. make + 宾语 + do sth
32. join their roots together underground 在地下的树根盘环桓交错在一起
33. pass food and water around
34. pass (v.) / past (prep.)
Exercises： 1) I can ＿＿＿＿＿＿＿＿＿＿＿ a church on my way to school.
2) I walk ＿＿＿＿＿＿＿＿＿＿＿ the church.
3) 街道太拥挤了车无法通行。The street was so crowded that cars were unable to ＿＿＿＿＿＿＿＿.
4) 他走过那家商店。 He walked ＿＿＿＿＿＿＿＿＿＿＿ that shop.
35. communicate with each other 互相交流
36. be in danger
37. danger (n.) / dangerous (adj.) / dangerously (adv.)
38. destroy our best fighters against pollution
Step 3 Post-reading
Read the text again and every student must prepare at least two questions about trees in the text for other students.
用这种方式训练学生发现问题和解决问题的能力。让每个学生都参与进来。不会问问题的学生可以回答别的学生提出的问题。提出问题的学生可以从其他学生那里得到问题的答案，也可以和大家一起回答自己没有想到的问题。这种活动更能体现学生的自主学习。老师只在适当的时候提供帮助。
当然也可以利用课本Speaking中的对话材料让学生进行讨论What can we do to fight pollution?
来进一步巩固课文，提高学生的语言运用能力。最后将讨论的主题笔头记录下来，作为学生回家的笔头作业 (How to fight pollution?)。
2. Listening
Step 1 Pre-listening 在听之前，创设情境，要求学生明确听力任务，如有生词，可以先帮助学生（recognize key words），扫清在听力材料中出现的词汇，提高听的效果。 本单元的听力材料是一段对话，话题还是跟树有关，要求学生在听了对话之后完成一个poster填写。
八年级英语Pollution Fighters教案2由www.deyou8.com收集及整理,转载请说明出处www.deyou8.com
Step 2 While-listening诱发兴趣，增强听的动力。可以让学生先将poster 看一看，然后再听。再根据所听内容完成poster的填写。
Step 3 Post-listening 要求学生根据poster的内容进行pair work的活动。培养学生的听说能力。
3. Language (the present continuous tense)
Step 1 Lead -in
1) Warming up： Talk about the pictures by asking and answering.
e.g. A： What are they doing? B： They are planting trees.
A： Are they picking apples? B： Yes， they are picking apples from the apple trees.
2) Present “the present continuous tense“
Tell the students what we use the present continuous tense for. (Talking about what is happening now)
What is the structure? am/is/are + doing
First， do spelling exercises to add -ing to the infinitive of the verb. (e.g. eat---eating， sing---singing， study---studying. )
Show the table on the computer.
For most verbs ending in...
Change
Examples
One e (except be)
Drop e， and add ing
advising driving
using being
ie
Change ie to y， and add ing
dying tying lying
Consonant letter + vowel letter + consonant letter
Double the last letter (except where the last letter is a y)， and add ing
cutting stopping
winning putting
saying
Step 2 Exercises
Write the correct -ing form of these verbs.
1. be ＿＿＿＿＿＿＿＿＿＿＿ 9. lie＿＿＿＿＿＿＿＿＿＿
2. become＿＿＿＿＿＿＿ 10. load＿＿＿＿＿＿＿＿
3. begin＿＿＿＿＿＿＿＿＿ 11. pull＿＿＿＿＿＿＿＿
4. carry＿＿＿＿＿＿＿＿＿ 12. put＿＿＿＿＿＿＿＿
5. drop＿＿＿＿＿＿＿＿＿＿ 13. rain＿＿＿＿＿＿＿
6. escape＿＿＿＿＿＿＿＿ 14. sunbathe＿＿＿＿
7. eat＿＿＿＿＿＿＿＿＿＿＿ 15.travel＿＿＿＿＿＿＿＿
8. iron＿＿＿＿＿＿＿＿＿＿ 16. yawn＿＿＿＿＿＿＿
Common errors.
1. What you are doing? ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
2. I watching television. ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
3. I‘m listen to a cassette. ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
Put the verbs in brackets in the present continuous tense to make sentences. Make the verbs with question marks into questions. Add any necessary punctuation marks. The first one is done for you.
1. the Grade Eight students (play) volleyball
The Grade Eight students are playing volleyball.
2. Richard and Ping Kang (camp?)
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
3. Ye Qing (shop)
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
4. Joyce (sweep?) the floor
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
Do the exercises to learn the differences between the simple present tense and the present continuous tense.他们很熟悉一般现在时，也刚刚学过现在进行时，这道练习可以对这两种时态进行区分，巩固所学，加深理解。
1. I (have) my fourth cup of tea this morning. I often (not drink) so much tea.
I‘m having my fourth cup of tea this morning. I don‘t often drink so much tea.
2. It doesn‘t usually (rain) at this time of year， but today it (rain) heavily.
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
3. The timetable says the last train (leave) at midnight. Quick. It‘s exactly midnight， and the guard (blow) his whistle.
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
4. Paul (hide) behind that tree. He (not want) to talk to us.
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