沪教牛津版(五四制)七年级下册（新版）Unit 10 Water Festival精品ppt课件

这是一份沪教牛津版(五四制)七年级下册（新版）Unit 10 Water Festival精品ppt课件，共22页。PPT课件主要包含了连词when等内容，欢迎下载使用。
Review.Hw can we make iced fruit punch?
Learn the new wrds!
frm n. 形态；形式
three frms f water: water, steam, ice
freeze v. （使）冻结；结冰 turn int转变成；将……变成
When water freezes, it turns int ice.
cl dwn变凉；冷却下来
When steam cls dwn, it turns int water.
lid n. （容器的）盖；盖子
1 minute=60 secnds
Read the wrds and phrases fr a few minutes.
Read ‘Lk and read’ silently. Answer the fllwing questins.
(1) What happens when water bils?(2) What happens when water freezes?(3) What happens when ice melts?(4) What happens when steam cls dwn?
It turns int steam.
It turns int ice.
It turns int water.
Read and answer
Discuss the fllwing questins in grups.
(1) Put a dry lid n a glass f ht water. Wait fr ten secnds. Take the lid ff. What is under the lid? Hw des it happen?(2) Put sme ice cubes in a glass f water. Wait fr tw minutes. Lk at the utside f the glass. What is n the glass? Hw des it happen?
Drps f water. The ht water in the glass turns int steam. The steam turns int drps f water n the lid.
Drps f water. The steam in the air turns int water n the cld glass.
1. 含义及用法when作连词，意为“当……的时候”，引导时间状语从句。when引导的时间状语从句，可以放在主句之前，也可以放在主句之后。I lved English when I was at schl. 我上学时喜欢英语。When she was thirteen, she began t play the guitar. 她十三岁时开始弹吉他。
2. 时态（1）当主句为一般将来时，when引导的时间状语从句用一般现在时表将来。I will call yu when I cme back. 我回来时，会给你打电话。When he cmes, we will start the meeting. 他来了，我们就开始会议。【拓展】当主句中含有情态动词或主句是祈使句时，when引导的时间状语从句也用一般现在时。When yu are ill, yu must see a dctr. 你生病时，必须看医生。Be careful when yu crss the street. 过马路时，要小心。（2）当主句为一般过去时，when引导的时间状语从句也用一般过去时。When he was 7, he culd swim. 他七岁时就会游泳了。
1. Three frms f water水的三种形态frm ①〔名词〕形态；形式；表格in the frm f...以……的形式The disease can take several different frms. 这种疾病可能有几种不同的形式。Please fill in a frm first. 请先填一张表格。②〔动词〕形成；构成Put the letters in rder t frm a wrd. 按顺序排列字母，组成一个单词。
Language pints
2. freezes 冻结freeze〔动词〕（使）冻结，结冰Water freezes at 0℃. 水在0摄氏度时结冰。【拓展】①frzen 〔形容词〕冷冻的，冷藏的frzen fish 冷冻鱼②freezing 〔形容词〕极冷的I’m freezing! 我要冻僵了！
3. cls dwn冷却cl dwn ①变冷；冷却下来Drink until the ht water cls dwn. 热水冷却下来再喝。②镇静下来，平静下来First cl dwn and then make the right decisin. 先镇静下来再做正确的决定。
4. When water bils, it turns int steam. 水烧开时就变成了水蒸气。turn int转变成；将……变成When it is ht, ice can turn int water. 天热时，冰可以变成水。【拓展】turn... int...使（从）……变成……The witch turned the prince int a frg. 女巫把王子变成了一只青蛙。
I. 选择最恰当的答案
1. I have gt sme questins fr yu________ . A) think B) t thinkC) thinking abut D) t think abut2. The weather was________and everything seemed t be _________.A) freezing; freezing B) frzen; freezingC) freezing; frzen D) frzen; frzen3. —Please remember t say gdbye t Mr. smith when yu __________ tmrrw.—Sure, I will.A) leave B) will leave C) left D) have left
II. 用所给词的适当形式填空
1. Peple can cups and bttles glass. 2. Finally the ice cubes the lemnade. Then punch is ready. 3. _______ the pan the stve (炉子). Let the fd cl. 4. the water the cup. And then take it t yur grandpa.
make ut f
Take ff
add t
Pur int
III. 根据所给要求完成句子1. There are three frms f water in the wrld. (对划线部分提问)_________ _________ _________ f water are there in the wrld?2. When water freezes, it turns int ice. (对划线部分提问)_________ _________ when water freezes?3. Yu can make the bat mve by puring water int it. (对划线部分提问)_________ _________ yu make the bat mve?
Hw many frms
What happens
Hw can
1. Cmplete the exercises in Wrkbk 7B n pages 64 and 70. 2. Review the imprtant language pints.