When was it built?
1.詞匯
invention, display, natural, guide, underground, cheer, desert, human, being, disappear, discover, found, entrance, exit, park, object
2.詞組
hundreds of years, be made of, be founded, look up …in a dictionary, keep …warm, be filled with, think of
3.語法 被動語態過去時的用法
4.句型
肯定句：The museum was built in 1971.
否定句：The museum wasn’t built in 1970.
一般疑問句：－Was the museum built in 1971？
一Yes，it was.
－No，it wasn’t
特殊問句：When was the museum built？
核心知識
invention, display natural, guide, under ground, cheer, desert, human being, disappear, disappearance, discover, found, entrance, exit, park, parking, danger, pause, teapot, bowl, serve, object
hundreds of years成百上千年，the way to the museum去博物館的路， be made of由……制造，be used for doing sth.用于…做什么， be founded建立，成立， look up …in a dictionary查字典， a cup with three legs有三條腿的杯子，serve win倒酒，keep…warm保溫，be filled with裝滿，be mentioned提到，think of認為，想起.
1.I called you yesterday afternoon， but you were not at home.
我昨天下午給你打個電話，可是你不在家.
call sb.給某人打電話，相當于give sb. a call 或fling up sb.
I will ask her to give you a call tomorrow.我明天要他給你打電話.
Mary rang up her father last night.昨晚瑪麗給父親打過電話.
2. …I went to the biggest museum in town yesterday.
昨天我到城里最大的博物館去了.
in town在鎮里(城里)介詞短語在這里作定語，修飾前面名詞“the biggest museum.”
3. The biggest museum？最大的博物館？這句話是一個省略問句，其完全形式是“Did you go to the biggest science museum？”
4.I saw many old inventions on show.我看到許多古老的發明在展覽.
invention 名詞，其動詞為invent“發明”.同詞根為“inventor”，“發明家”.
如：Edison was a great inventor. He invented many useful things all his life。
Many of his inventions have changed the world.愛迪生是一個偉大的發明家.他一生發明了很多有用的東西.他的許多發明都使世界發生了變化
5. They were all invented hundreds of years ago.他們都是數百年前發明.
1)“were invented”為一般過去時的被動語態.
2)hundreds of years…成百上千年.又如：thousands of years成千上萬年；millions of years數百萬年.英語中，hundred，thousand，million前如沒有具體數詞就可使用這種結構，但如果說三百學生，五千只綿羊，一百萬只鳥，則只能說：“three hundred students, five thousand sheep, a million birds.
6.Why not go there and have a look？為什么不去那看一看？
這句話用等于 Why don’t you go there and have a look?
7.They were very interested in dinosaurs.他們對恐龍很感興趣.
be interested in sth.＝ show(great)interest in sth.
如： My sister is very interested in story-books.我妹妹對故事書很感興趣.
也可說 My sister shows great interest in story－books.
8.All the students cheered.所有的學生都歡呼著，
cheer及物動詞，“使振奮，使高興，為…歡呼，高呼”
如： The teacher was cheered by his students.那位老師受到學生們的喝彩.
cheer也可為不及物動詞. 如：I cheered up at the news.聽到這個消息，我感到振奮. cheer作名詞歡呼，喝彩.Cheers.“干杯”.
9. …So these eggs were laid long, long ago by dinosaurs. 這些蛋是恐龍很久很久以前下的.
lay－ laid－ laid及物動詞 1)放、擺，如： Lay the coat on the bed.把衣服放在床上. 2)鋪，架設如： Lay a bridge across the river.在河上架橋. 3)產卵，如： A turtle lays many eggs at once.海龜一次能下很多蛋.本文中用了“were laid by…”過去時態的被動語態結構.如這個白色的蛋是那只白母雞下的，可譯成：The white egg was laid by the white hen.
10.That means dinosaurs lived long before human beings appeared.
那意味著恐龍早在人類出現之前就生活在那里了.
human beings人類，“appear”出現不及物動詞，其反義詞加否定前綴 dis - disappear消失，類似有 agree一 disagree贊同不一致.
believe一disbelieve相信一不信任 like-dislike喜歡--不喜歡
11.Scientists try to explain their disappearance, but they’ve got more questions than answers.
科學家們試圖解釋恐龍消失的現象，可他們的疑問多于答案.
disappear消失(動詞)一 disappearance消失，失蹤(名詞)不可數.
12.And now there is a special dinosaur on display.
現在有一種特別的恐龍在展覽.
on display等同 on show在展覽.
13.It was discovered in Liaoning Province.它(恐龍)是在遼寧省發現的.
discover與invent：discover發現；指發現的對象是本來存在的，只是以前不知道而且，也可指發現新奇或意外之物或發現某種情況； invent發明；發明的對象是以前沒有的新東西，如工具，手段或方法.
14.I say it is special because the dinosaur was covered with feathers.我之所以說它特別，是因為它是由羽毛覆蓋的恐龍.
be covered with由…覆蓋
The field is covered with snow.田野上一遍積雪.
15.Then we can see many dinosaurs discovered by you in this museum.那么我們就能在這個博物館里看到由你發現的恐龍了.
…discovered by you是一個過去分詞短語，在句子作定語修飾dinosaurs.
典型例題
1.過去時態的被動語態
其基本結構為was／were + 及物動詞的過去分詞.
肯定式：The museum was built in 1971.
否定式：The museum wasn’t built in 1970，
一般問句：Was the museum built in 1971？ Yes， It was.／No， it wasn’t.
特殊問句：When was the museum built？
2.“be made of” 與“be made from”由…制成 be made of“由…制成”，看得出制成品，而“be made from…”由…制成”，看不出制成品。
解析 如：The bridge was made of stone.那座橋是由石頭做成的. The paper is made of wood.紙是由木頭制成的.
3.閱讀分析點撥
My uncle gave me a small calculator(計算器) on my 1 birthday. I like it very much and I can use it freely. But my teacher of maths asked me 2 use it in her class. However， I always put it into 3 pocket wherever I go with my parents or without them.
One Sunday morning， My mother and 4 went to the street. We first bought some vegetables. Then I said I’d like to have some fish for lunch. My mother chose a large fish and the man weighed it. My mother asked him 5 it weighed and what the price was. The man said the fish was eight and a half yuan. We both said it was 6 . The man was asked 7 the fish again. I 8 my small calculator and it worked very fast. I told it to 9 . His face turned red. It was only six and a half yuan. I thought that a big man’s head was not as 10 as my calculator sometimes.
1. A. fourteen B. forty C. fourteenth D. fourteens
2. A. always to B. often to C. never to D. sometimes to
3. A. mine B. my C. I D. me
4. A. me B. I C. my D. mine
5. A. how many B. how much C. how did D. what did
6. A. very cheap B. very beautiful C. too expensive D. right
7. A. weighed B. to weigh C. weigh D. weighs
8. A. cast B. took away C. broke D. brought out
9. A. the man B. the woman C. my mother D. myself
10.A. cheap B. large C. of D. good
分析 1.C.十四歲生日用序數詞.2.C.動詞不定式的否定形式.3.C.形容詞性物主代詞后接名詞.4.B.主格作主語.5.B.詢問多重.6.C.認為太貴才提出質疑.7. B.用“ask sb. to do sth.”此結構被動形式.8. D.“拿出”之意， 9. A.根據上下文賣魚者為男士.10.D.同文中句意相符.
4.There are students on the playground.
A. four hundred of B. four hundreds of
C. hundreds of D. four hundreds
解析 hundred前面若有具體的數字，后面不加s，也不加of，若無具體的數字則加s，后接of表示“上百的”.故選“C”
5.The PRC on October 1,1949.
A. was found B. was founded
解析 found有兩概念，一是“find”發現，找到的過去式，二是動詞原形意為“成立，建立”根據題意應用found一詞的被動語態結構，故選“B”
6. The bowl hot water.
A. is full with B. is filled of C. is filled with
解析 “be full of”“充滿”，“be filled with”裝滿，搭配得當的詞應為“C”，故選“C”
7.The strange cup three legs were used for .
A. with, drinking B. has，drink C.of，drinking
解析 the strange cup with three legs. 劃線部分的介詞短語作賓語后置，類似有： a boy with a ball in his hand. be used for doing…，故選A.
【關于“Unit 10 When was it built?”的常見問題】
常見問題1: When was it built?1
問題：
這種動物很久以前就滅跡了.
誤：This kind of animals was disappeared long, long ago.
正：This kind of animals disappeared long, long ago
解答:
分析 disappear為不及物動詞，不能用被動語態.
常見問題2: When was it built?2
問題：
長羽毛的恐龍是在遼寧省發現的.
誤：The feathered dinosaur was invented in Liaoning Province.
正：The feathered dinosaur was discovered in Liaoning Province.
解答:
分析 invent發明，發明的對象是以前沒有的新東西；discover發現；指發明的對象是本來存在的，只是以前不知道而已，也可指發現新奇或意外之意.
常見問題3: When was it built?3
問題：
完成句子
1.Excuse me. How can I get to the station？
Excuse me. you me to the station？
2.The pot is full of hot water. It is several hundred years old.
The pot is hot water. It was made years ago.
3.People use knives for cutting things.
for cutting things.
4.The boss made the workers work twelve hours a day.
The wokers work twelve hours a day.
5.The farmers built their houses in winter.
The farmers’ houses in winter.
解答:
1. Can，tell，the way 2. Filled with，hundreds of 3. knives are used 4.were made to 5. were built
常見問題4: When was it built? 4
問題：
Our school has eight __ student．
A．hundreds B．hundred C．hundreds of D．hundred of
解答:
分析hundred，thousand之類的數詞，前面如有具體的基數詞，后面不加s，也不帶of，直接接名詞。注意審題，別誤選C。
答案B
常見問題5: When was it built? 5
問題：
When the lights are red, you can go_________the road.
A．through B．cross C．across D．crossing
解答:
分析本題中只有A和C為介詞，符合題意，而through表示從某一事物里面穿過，across指在表面橫過、穿過。本題意思是：當交通燈是紅燈時，你不可以橫過馬路。
答案C