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Unit 1 AsiaGrammar注意：①指代人时与he 和she 辨析Lucy is knocking at the door and she wants to see you.it 主要指代身份不明或者未确定的人，she/he 则指代已知或身份明确的人。
注意：②指代物时与one 辨析It 指代前文提到的同名称的，同一个事物，it 可指代可数名词单数，也可指代不可数名词。
One 指代同名称中的同一类食物，既可指代人也可指代物，但只能代替可数名词单数，复数形式为ones You promised to write a novel.You must finish it .Your skirt is nice and I want to buy one like yours.二.It 做形式主语基本用法：当不定式，动名词，从句等用作主语时，避免头重脚轻，通常在句首使用形式主语it ，而把真正的主语治愈句末。
Getting on well with neighbors in your neighborhood is very important.It's important to get on well with neighbors in your neighborhood.1.It's +adj+( for/of) sb. to do sth.①It be adj. for sb. to do sth.adj.通常为描述事件的形容词：easy,difficult,hard,necessary,possible,important,polite,dangerous,legal等①It be adj. of sb. to do sth.adj.通常为描述人的形容词：kind,nice,rude,cruel,thoughtful,careful,clever,foolish,stupid,wise,crazy等2.It is adj./n. to do sth.&It is adj./n. that从句It's a waste of time to play puter games all day.It's amazing that there are so many rocks in unusual shapes in the cave.It is a pity that she failed in the exam again.3.It is of +n.(抽象名词)to do sthIt is useful to master more words to improve your English.=It is of use to master more words to improve your English.It’s important to get on well with neighbors in your neighborhood.=It’s of importance to get on well with neighbors in your neighborhood.4.It is time for sth=It is time to do sth 该做某事了。
GrammarTeaching aims:1. To grasp different uses of it.2. To distinguish different uses of it.Teaching steps:Step 1 Revision翻译下列句子，说出it 在句中表示的意思。
1). 明朝和清朝的皇帝曾住在故宫，但它在1925年的时候被变成了博物馆。
The emperors of the Ming and Qing dynasties used to live in the Palace Museum.But it was turned into a museum in 1925.(it表示：the Palace Museum)2). 有这么多形状不寻常的岩石真是神奇。
It is amazing that there are so many rocks in unusual shapes.(it表示：that 从句的内容)3). 租一辆自行车，骑着它环游乡村也很受欢迎。
It’s also popular to hire a bike and ride around the countryside.(it表示：hire a bike and ride around the countryside)4). 从我家到学校大约3公里。
It is about 3 kilometresfrom my home to my school,(it表示：距离)Step 2 PresentationUses of itpronoun1. We use it for animals and lifeless things.e.g. Look at the panda. It is so small.Another famous attraction is the Great Wall. It runs for over 6,000 kilometersacross the northern China.We use it for a young child when we do not know whether it is a girl or a boy.e.g. My aunt will have a baby soon. She hopes it will be a girl.Loo k at that cute baby over there! It is a boy, isn’t it?We use it for an unknown person.e.g. — Who was calling you on the phone just now?— It was my cousin.We use it for an action, a situation or an idea mentioned in a previous statement. e.g. Reading around the countryside is popular in Guilin, isn’t it?Tourists like to take a boat trip along the Lijiang River. It is great fun.2. it作人称代词1) 指代刚提到的事物。
e.g. Look at that car. It is going much too fast.2) 指无生命的东西。
e.g. It is my pencil.3) 指动物。
e.g. —Is it your dog?—No, it isn’t.4) 指未知性别的婴儿。
e.g. What a beautiful baby! Is it a boy?5) 指所未见的或所未知的那个人。
e.g. Someone is ringing the doorbell. Go and see who it is.3. The exchange students visited the Summer Palace yesterday. Kevin is writing about it. Read the passage below and find out what each it refers to. Write your answers in the blanks.Yesterday we visited the Summer Palace and spent about three hours in it. Thepalace is a Chinese garden and mainly includes a hill and a lake. The lake is very big — it takes up three quarters of the area. It was frozen, so we could not row a boat there. It was really a pity. Across the lake is a 17-hole bridge. There are many stone lions on either side of it. The lions are all different from eac h other. Isn’t it amazing? While I was walking along the bridge, my mobile phone rang. It was my mum. I told her that the Summer Palace was well worth visiting.Keys: 1. the Summer Palace 2. the lake 3. the lake4.we could not row a boat5. the bridge6. different lions7. an unknown personStep 4 Using it as an impersonal pronoun1. We also use it for the time, the date, the weather, the distance, etc.e.g. It is 6:30 p.m. It is raining heavily outside.It is 1 January today. It is New Year's Day.In Beijing, it is cold and windy in winter.It is two kilometers from my school to my home.2. it作非人称代词1) 指天气。
e.g. It’s raining.2) 指时间。
e.g. It’s half past eight.3) 指环境。
e.g. It’s quiet here.4) 指距离。
e.g. How far is it from your home to your office?3. The exchange students left for Shanghai. Kevin has made some notes in his diary. Rewrite his sentences with it.1. Today is 22 February. We left Beijing for Shanghai early in the morning._______________________. We left Beijing for Shanghai early in the morning.2. Shanghai is about 1,300 kilometers from Beijing._____________________________ from Beijing to Shang hai.3. I woke up at 5 a.m. this morning.__________ when I woke up this morning.4. I felt a little cold when we went out. The temperature was only 2℃.I felt a little cold when we went out. ______________.5. Winter is very cold and dry in Beijing.In winter, _____________________________.6. We arrived in Shanghai on a sunny day.________________ when we arrived in Shanghai.7. We got to our hotel at noon.____________ when we got to our hotel.8. Our hotel is not far from the Bund.____________ from the Bund to our hotel.Keys: 1. It is 22 February today 2. It is about 1,300 kilometers3. It was 54. It was only 2℃5. it is very cold and dry in Beijing6. It was a sunny day7. It was noon8. It is not farStep 5 Using it to replace the real subject or object1. Sometimes we use it to replace the real subject or object in a sentence. In this situation, we put the real subject or object later in the sentence in the form of a to-infinitive or a clause.e.g. It is very tiring to climb the steps.It is popular to hire a bicycle and ride around the countryside.It is amazing that there are so many rocks in unusual shapes in the cave.Many people find it pleasant to travel around.2. Useful structures with itIt is + adjective + (of/ for…) + to…It takes… some time to…It is said/ reported/… that……think(s)/ find(s) it easy/ difficult/… to…3. it作形式主语或形式宾语有时为了保持句子的平衡，常用it作形式主语或形式宾语，而把真正的主语或宾语放到句子的后面。
