初中英语Unit 4 Life on MarsGrammar集体备课课件ppt

这是一份初中英语Unit 4 Life on MarsGrammar集体备课课件ppt，共41页。PPT课件主要包含了to Mars，ircle，greement，ossibility，lien，tranger，because of，ife，ate，eel等内容，欢迎下载使用。

A Using adverbial clauses r simple sentences We can rewrite sme adverbial clauses in simple sentences with prepsitinal phrases beginning with at the age f, because f and withut. Neil Armstrng received his student pilt’s licence when he was 16.→ Neil Armstrng received his student pilt’s licence at the age f 16.
Peple might flat in space because the gravity is lw.→ Peple might flat in space because f the lw gravity.Humans cannt survive if there is n fd, water r xygen. ①→ Humans cannt survive withut fd, water r xygen.
Learning abut uter space Daniel is writing abut visiting anther planet. Help him rewrite the sentences using the wrds in brackets. 1. Neil Armstrng tk his first flight when he was nly six. (at the age f ) ____________________________________________________
Neil Armstrng tk his first flight at the age f six.
2. Yuri Gagarin became the first man t g int uter space at the age f 27. (when) ________________________________________________________________________________________________________3. Peple might mve t anther planet in the future because the ppulatin n the Earth is increasing rapidly. (because f ) ________________________________________________________________________________________________________________________________
Yuri Gagarin became the first man t g int uter space when he was 27.
Peple might mve t anther planet in the future because f the rapid increase in the ppulatin n the Earth.
4. If there is n fresh fd, meals will nt be as tasty as they are tday. (withut) _______________________________________________________5. It wuld be funny t play ftball n Mars because f the lw gravity. (because) ______________________________________________________________________________________________________________
Withut fresh fd, meals will nt be as tasty as they are tday.
It wuld be funny t play ftball n Mars because the gravity is lw.
6. Withut special bts, yu cannt walk n Mars. ()____________________________________________________
If yu d nt wear special bts, yu cannt walk n Mars.
B Using bject clauses r simple sentences We can rewrite sme bject clauses in simple sentences with prepsitins like f and abut.The smell f the pills reminds them that fd n the Earth is tasty.→The smell f the pills reminds them f the tasty fd n the Earth.Are they sure that space travel will be very fast? →Are they sure abut the fast speed f space travel?
Abut the planet Mars Millie knws little abut the planet Mars. She is asking Daniel fr mre infrmatin. Rewrite Millie’s sentences using the wrds in brackets.
Millie: (1) Are yu aware hw far Mars is away frm the Sun? Daniel: Yes. Mars is abut 142, 000, 000 miles away frm the Sun. It takes Mars abut tw Earth years t circle arund the Sun nce.Millie: (2) Are scientists in agreement that living n Mars wuld be pssible fr humans in the future? Daniel: N. But they’re wrking hard t learn mre abut Mars.
Millie: (3) D they think that the lw gravity n Mars might be a prblem?Daniel: Yes, they d. Millie: (4) Are yu aware what transprt culd be like n Mars?Daniel: It culd be much better than that n the Earth. Hwever, scientists aren’t sure whether peple culd grw plants n Mars.Millie: (5) I wnder hw many peple wuld like t mve t Mars. (6) I think peple shuld knw that life n Mars wuld be different frm that n the Earth.
1. Are yu aware ___________________________________ (distance)?2. D scientists agree ________________________________________ _______________________________________________(pssibility)?3. Have they thught _________________________________________ (prblem)? 4. Are yu aware ___________________________________(transprt)?
f the distance between Mars and the Sun
abut/with the pssibility f living n Mars
fr humans in the future
abut the prblem f the lw gravity n Mars
f the transprt n Mars
5. I wnder ________________________________________________ ___________________________________(number). 6. I think peple shuld knw _________________________________ _____________________________________ (differences).
abut the number f peple wh wuld like t mve
the differences between life n Mars
and that n the Earth
C Using defining relative clauses r simple sentences We can rewrite sme defining relative clauses in simple sentences with prepsitins like with and in.Peple might live in huses which have huge cmfrtable rms.→Peple might live in huses with huge cmfrtable rms.On Mars yu might see peple wh wear special bts.→On Mars yu might see peple in special bts.
Curius abut MarsC1 Simn is writing abut Mars. Rewrite the defining relative clauses in simple sentences with the prepsitin with r in. 1. Mars is a planet that has an envirnment similar t that f the Earth.2. Astrnauts wh wear space suits and helmets might stay n Mars fr hurs.3. It is difficult t breathe n a planet that has much thinner air than that n the Earth.4. On Mars there might be peple wh carry air tanks n their backs.
C2 Simn is interested in stries abut aliens. He even writes t aliens. Replace each f the underlined parts in his letter with anther expressin.Dear aliens, Humans are thinking abut mving t anther planet (1) because the pllutin n the Earth is very serius. Many peple are in n dubt (2) that life n Mars wuld be very interesting, but I am nt sure.
We culd nt play ftball n Mars (3) because f the lw gravity. Life wuld be bring fr me (4) if I culd nt play ftball. Maybe this prblem culd be slved by building indr playgrunds (5) which have the same ftball fields as thse n the Earth.By the way, wuld strangers be welcme? I hpe t hear frm yu sn.Simn
①Humans cannt survive withut fd, water r xygen.
withut prep. 没有；不和……在一起e.g. Tny always ges ut withut a cap in winter. 托尼冬天外出总是不戴帽子。 He went ut withut saying a wrd. 他一句话没有说就出去了。
withut是个兼类词，常用作介词，主要意思有“没有，毫无，不(反义词是with)；如果没有，要没有(表示条件)；不，没有(后面接名词)”。
Thanks t the vide Visiting the Wrld Online, we can enjy the sights ______ leaving hme. A. with B. by C. withut
【解析】考查介词辨析。句意：多亏了《在线访问世界》这个视频, 我们足不出户就能欣赏到美景。with用；by由, 通过；withut没有。由句意可知选C。
用介词短语把状语从句转换成简单句（1） 由when, befre, after等引导的时间状语从句, 可以用合适的介词短语来代替。e.g. We’ll play ftball when schl is ver.→We’ll play ftball after schl. 放学后我们要踢足球。
简单句和复合句之间的转换(二)
Yu must wash yur hands befre yu have meals.→Yu must wash yur hands befre meals.饭前必须洗手。（2）由if, unless引导的条件状语从句, 可改为由withut构成 的介词短语。e.g. Peple can’t live if there is n air r water.→Peple can’t live withut air r water. 没有空气和水, 人类不能生存。
（3）由because引导的原因状语从句, 可改为由because f 构成的介词短语。e.g. We didn’t g there because it rained heavily.→ We didn’t g there because f the heavy rain. 由于下大雨, 我们没有去那里。
（4）(as... ) as引导的比较状语从句, 有时可改为“be f the same+名词”结构。e.g. Lily is as ld as Lucy.→Lily and Lucy are f the same age. 莉莉和露西一样大。
Mr. White began cllecting cins when he was fifteen. (改为简单句) Mr. White began cllecting cins ______ the ______ f fifteen.
at age
【解析】原句中的when he was fifteen相当于at the age f fifteen。
用介词把宾语从句转换成简单句某些动词后的宾语从句, 可以用介词加名词、代词或动名词(短语) 转换成简单句。e.g. He insisted that he shuld g with us.→He insisted n ging with us.他坚持要和我们一起去。
The pr by desn’t knw when and where he was brn.→ The pr by desn’t knw the time and the place f his birth.那个可怜的男孩不知道他出生在何时、何地。
用介词把定语从句转换成简单句。如果定语从句中的谓语动词have表示“有”的含义, 从句可转换成with短语作后置定语。e.g. He is a man wh has a lt f mney.→He is a man with a lt f mney. 他是个有钱人。
1. A square has fur sides but a c has n sides.2. I am a hundred percent in a with yu.3. We must accept the p that we might be wrng.4. After being away fr s lng, he feels like an a in his wn cuntry nw.5. Srry, I dn’t knw. I’m a s here myself.
一、根据句意及所给首字母提示写单词
6. 我的祖母十七岁就结婚了。 My grandmther gt married _________________________ seventeen.7. 由于下雨, 我们的野餐计划失败了。 Our picnic plan went wrng ______________ the rain.
二、根据所给汉语完成下列句子
at the age f/ when she was
8. 我或许可以早一点到。It ________________________ t get there earlier.9. 它使我想起了以前我犯的一些错误。It ________________ the mistakes I had made befre.10. 你确定要他做你的终生伴侣吗？______________ that yu want him fr yur partner fr life?
might be pssible fr me
reminded me f
Are yu sure
11. The by can’t cme t schl because he is ill. The by can’t cme t schl _______________________.12. The phts remind me that I travelled t the UK five years ag. The phts remind me ______ my trip t the UK five years ag.
because f his illness
13. Here cmes a tall man wh has a bk under his arm. Here cmes a tall man ___________________________.14. On Mars yu might see peple wh wear special bts. On Mars yu might see peple __________________.
with a bk under his arm
in special bts
15. I can’t wrk ut the maths prblem if yu dn’t help me. I can’t wrk ut the maths prblem __________________.16. If I dn’t have a rest, I can’t walk further. I can’t walk further __________________.
withut yur help
withut a rest
17. He culd nt g t the party because he had much hmewrk. He culd nt g t the party ____________________________.18. Are yu certain that Tm is wrrying abut the easy exam? Are yu certain ________________________________________?
because f much hmewrk
abut Tm’s wrry abut the easy exam
19. We prefer t stay in a htel rm which has a sea view. We prefer t stay in a htel rm __________________.20. The man wh wears a black jacket is my uncle. The man ___________________ is my uncle.
with a sea view
in a black jacket
根据课文内容补全下列对话。A: Hw d yu like l n Mars, Eddie?B: At the beginning I l it very much because it made me feel excited. But nw I really h it.
A: Why?B: I can’t g t my fd because I must wear this helmet. That makes me f really bad.A: D yu like the fd here?B: N. All the fd is in the f f p and it’s nt as delicius as it is n the Earth.
A: Is there anything b n Mars than n the Earth?B: Let me see. Oh, yes. There is n p here and r can help us with ur hmewrk.A: That’s really wnderful!
本节课主要学习了以下知识点, 请同学们及时巩固练习：circle , agreement , pssibility , stranger , uter space……
熟记本课时的词汇熟读教材的内容完成本课时的课后作业。