最新新概念英语第二册-38课课件ppt
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新概念英语第二册课件(Lesson 38 Everything except the weather)
After so many years of sunshine, Harrison got
a shock.
after ['ɑ:ftə(r)] prep在…后面; conj.在…以后; adv.以后，继后; adj.后来的，以后的;
汉译英：在这么多天雨之后
after it rained for days = after so many days of rain eg. After six years of hard work, he was successful. get a shock : 吓了一跳, 吃了一惊 eg. She got a shock when she see the telephone bill. 她看到电话帐单大吃一惊
He acted as if he had never lived in England before. as if+句子 : 似乎, 好像 eg. It looks as if it‟s going to rain. 看上去要下雨了 My leg hurts as if it was broken. as if 从句用陈述语气的情况： 表示说话者
Lesson 38
Everything except the weather
except [ik'sept] prep.除了 complain [kəm'plein] v.抱怨 continually [kən'tinjuəli] ad.不断地
bitterly ['bitəli] ad.刺骨地
sunshine ['sʌnʃain] n.阳光
bitterly ['bitəli] adv.刺骨地; 痛苦地
lesson新概念第二册第38课ppt课件
She likes all the books except that blue one.
2. We come to school everyday, but not Monday.
We come to school everyday except Monday.
• ★complain v. |kəm'plein|
England and had planned to settle down
in the country.
dream of doing sth
I have always dreamed of winning the lottery.
1. 水不停从桥下流过。
The river flows under the bridge continuously.
• ★continually • |kən'tɪnjuəli|
adv. (frequently)
1. 小孩时不时地会哭。
The baby cries continually.
2. 天频繁地下雨。
• My old friend, Harrison, had lived in the
Mediterranean for many years before he returned to England.
Had+ v.p.p
past perfect tense
Sb. had done sth before sb did sth
• ★sunshine
• ★except prep. (apart from) |ik‘sept|
•Everyone is here except Lily. (Lily is not here.) 1. She likes all the books, but she does not like that blue one.
2. We come to school everyday, but not Monday.
We come to school everyday except Monday.
• ★complain v. |kəm'plein|
England and had planned to settle down
in the country.
dream of doing sth
I have always dreamed of winning the lottery.
1. 水不停从桥下流过。
The river flows under the bridge continuously.
• ★continually • |kən'tɪnjuəli|
adv. (frequently)
1. 小孩时不时地会哭。
The baby cries continually.
2. 天频繁地下雨。
• My old friend, Harrison, had lived in the
Mediterranean for many years before he returned to England.
Had+ v.p.p
past perfect tense
Sb. had done sth before sb did sth
• ★sunshine
• ★except prep. (apart from) |ik‘sept|
•Everyone is here except Lily. (Lily is not here.) 1. She likes all the books, but she does not like that blue one.
新概念第二册38优秀课件
1
将来完成时 will have done...
将来进行时除了表示最近或不久的将来正在进行的动作外， 还可以表示计划或安排好的事：
A great many people will be visiting the country. 将来完成时用于表示到将来某一时刻已经完成的动作。将来
完成时由will have+过去分词构成。它常与by和 not…till/until+表示时间的名词连用。 I hope they’ll have finished it in time for the journey. I expect you will have changed your mind by tomorrow. I will have finished it until/till tomorrow.
Page 4
根据所给的汉语意思写出单词，并用其正确形式填空。
1. He ____(抱怨)to me about the food yesterday. 2. That boy is crying ____(不断地). 3. She sat in the garden enjoying the ____(阳光). 4. We go there every day ____(除了)Sunday. 5. It is ___(刺骨地)cold today. 6. She ____(做梦)that she could fly last night. 7. My father will ____(退休)next year. 8. My legs were so weak that I could ____(几乎不)stand.
Kunming
15
How is the weather in London? Where is London?
将来完成时 will have done...
将来进行时除了表示最近或不久的将来正在进行的动作外， 还可以表示计划或安排好的事：
A great many people will be visiting the country. 将来完成时用于表示到将来某一时刻已经完成的动作。将来
完成时由will have+过去分词构成。它常与by和 not…till/until+表示时间的名词连用。 I hope they’ll have finished it in time for the journey. I expect you will have changed your mind by tomorrow. I will have finished it until/till tomorrow.
Page 4
根据所给的汉语意思写出单词，并用其正确形式填空。
1. He ____(抱怨)to me about the food yesterday. 2. That boy is crying ____(不断地). 3. She sat in the garden enjoying the ____(阳光). 4. We go there every day ____(除了)Sunday. 5. It is ___(刺骨地)cold today. 6. She ____(做梦)that she could fly last night. 7. My father will ____(退休)next year. 8. My legs were so weak that I could ____(几乎不)stand.
Kunming
15
How is the weather in London? Where is London?
新概念英语第二册Lesson38课件
We_ha_d_h_a_rd_ly_g_o_tt_en_t_h_er_ewhen_it_b_eg_a_n_to__ra_in_. Hardly_h_ad_w_e_g_o_tt_en__th_er_e_when_it _be_g_a_n _to_r_ai_n. 注：开头时才倒装。
6、Almost immediately he began to complain about the
In spring: Mild, dry and sunny. Rainy, cloudy and warm.
温和,干燥,阳光充足,多雨,多云。
In summer: Dry, cloudy and cool. Rain and showers.
干燥,多云,凉爽,雨淋。
In autumn: Dry, sunny. Fog early and late.
11、The dream he had had for so many years ended here.
定语从句-先行词-the dream
Lesson 38 Everything except the weather
英国属海洋性气候，具有冬暖夏凉的特点,冬夏没有很大差别，这 主要是因为它是一个岛屿国家。(冬天，海洋比陆地温度高，海风将热量带
到 陆地，导致陆地温度升高，夏天则相反) 西风常常吹过英国大陆，致 使常年有雨。
What is the weather like in England?
但奇怪的事情几乎立刻就发生了。
for--因为
even though--即使
rain continually 雨下个不停
bitterly cold 冷得厉害 副词修饰动词/形容词
7、After so many years of sunshine,Harrison got a shock.
6、Almost immediately he began to complain about the
In spring: Mild, dry and sunny. Rainy, cloudy and warm.
温和,干燥,阳光充足,多雨,多云。
In summer: Dry, cloudy and cool. Rain and showers.
干燥,多云,凉爽,雨淋。
In autumn: Dry, sunny. Fog early and late.
11、The dream he had had for so many years ended here.
定语从句-先行词-the dream
Lesson 38 Everything except the weather
英国属海洋性气候，具有冬暖夏凉的特点,冬夏没有很大差别，这 主要是因为它是一个岛屿国家。(冬天，海洋比陆地温度高，海风将热量带
到 陆地，导致陆地温度升高，夏天则相反) 西风常常吹过英国大陆，致 使常年有雨。
What is the weather like in England?
但奇怪的事情几乎立刻就发生了。
for--因为
even though--即使
rain continually 雨下个不停
bitterly cold 冷得厉害 副词修饰动词/形容词
7、After so many years of sunshine,Harrison got a shock.
新概念第二册英语lesson38课件
After so many years of sunshine, Harrison got a shock. 短语：
so many years 这么多年
get a shock 吓了一跳, 吃了一惊
He acted as if he had never lived in England before. as if 似乎, 好像 句式特点： as if +陈述语气，所表达的事情通常是真实的。
句中都可以。
Harrison had thought of everything except the weather. Your composition is good except for a few spelling mistakes. Except for an old lady, the bus was empty.
plain about sth. 抱怨…
3.even though=even if “即使” 引导让步状语从句 Even though I came here, my mind was absent.
4.bitterly cold 刺骨地冷
5. for (连词) ”因为“用于解释说明 The ground is wet, for it rained last night.
★except prep. 除…外 (不包括宾语） I know nothing about him except that he lives next
door. except 与besides 区别： besides 除 … 以外（还…）（包括宾语） 相当于 in addition to Besides English, they also study math, physics and
新概念第二册Lesson38课件
complain v.. complain to sb : 向某人抱怨 complain of/about : 抱怨某事 He complained to the police that the boys had stolen his apples.(控告，声诉)
continue v. The cold wave will continue. He had lunch and then continued his work. continual adj. 1.不间断的, 不停的 I am tired of this continual rain. Church Street is continual with High Street.
no sooner...than : (关联词)一...就... 同义as soon as, the moment ,on doing had no sooner done...than一般过去时, 固 定用法 (时态结构 : 完成时态 + than + 一般 过去时) He had no sooner arrived than he called me up. no sooner放在句首就要倒装 : No sooner had he arrived than he called me up(倒装)
Mediterranean Climate
As is know to all ,a typical English gentleman usually takes an umbrella with him.
Similarly,when people there meet others,they usually begin with the weather .
continue v. The cold wave will continue. He had lunch and then continued his work. continual adj. 1.不间断的, 不停的 I am tired of this continual rain. Church Street is continual with High Street.
no sooner...than : (关联词)一...就... 同义as soon as, the moment ,on doing had no sooner done...than一般过去时, 固 定用法 (时态结构 : 完成时态 + than + 一般 过去时) He had no sooner arrived than he called me up. no sooner放在句首就要倒装 : No sooner had he arrived than he called me up(倒装)
Mediterranean Climate
As is know to all ,a typical English gentleman usually takes an umbrella with him.
Similarly,when people there meet others,they usually begin with the weather .
新概念二 第38课课件
5.sunshine n. 阳光
a drop of sunshine 一缕阳光 She's always like a drop of sunshine.她经常像阳光一样。 sunlight sunlight 日光;阳光，指的是:白天来自太阳的光。 sunshine 阳光;日光，指的是:来自太阳的光和热。
1.except prep. 除了，除了...外。
Except a broken chair, the room has no furniture. 除了一把破椅子，这间房子里什么也没有。(chair与furniture性质相同) except for 除.. 之外 Except for a broken chair, the room is empty. 除了一把破椅子外，这间房子是空的。 (except for没有“所指项目类别”的限制) except that I know nothing about his career except that he is a graduate of Oxford University. 我对他的职业一无所知，只知道他毕业于牛津大学。 except表示“除.....外，(其余都)……”指同一类事物的总体中除去一部分。
课文注释
1.He had often dreamed of retirina in Enaland and had planned to settle dowr in the country.过去他常幻想退休后到英国，并计划在乡间安顿下来。
(1)dream of在这里不表示具体的做梦，而是“幻想”、“向往”的意思: Frank used to dream of having a car of his own. 弗兰克过去常幻想拥有一辆自己的车。 (2)settle down 是个固定短语，可以表示“定居”、“安身”、“安顿”等含义: They settled down in Australia in 1988. 他们1988年在澳大利亚定居了。 After two years of travelling,I want to settle down now. 旅行了两年之后，我现在想过安定的日子了。
新概念第二 册38课时
Harbin
Beijing
Latitude(纬度)
Shanghai Hangzhou
Kunming
How is the weather in London? Where is London?
Let’s talk!
How is the weather in England?
The Northern Hemisphere
Warming – up: How is the weather
How is the weather in Hangzhou today?
Moscow
Beijing
Shanghai
Toronto Boston
DIFFERENTt causes the different weather in different places?
frost（霜）. The two worst months in England are
January and February. They have many cold wet days one after another.
英国属海洋性气候，具有冬暖夏凉的特点,冬夏 没有很大差别，这主要是因为它是一个岛屿国 家。(冬天,海洋比陆地温度高，海风将热量带到 陆地，导致陆地温度升高，夏天则相反）.西风 常常吹过英国大陆，致使常年有雨.
England USA
China
Australia The Southern Hemisphere
What is the weather like in England?
In spring: Mild（温和的）, dry and sunny. Rainy,
cloudy and warm. In summer: Dry, cloudy and cool. Rain and showers. In autumn: Dry, sunny. Fog early and late. In winter: Strong winds, heavy rain. Snow, cold. The best seasons are spring and summer. The nearer
新概念英语第二册Lesson 38(共53张PPT)
Text
The dream he had had for so many years ended there.
Comprehension questions
• Why didn't he like the weather? • It rained continually and it was often bitterly
cold.
Comprehension questions
• Did he get a shock? • Yes, he did.
Text
1 The sea moves (continuously) (continually). 2 He borrows money from people (continuously) （continually）
Text
• After so many years of sunshine, Harrison got a shock.
before.
WORDS
New words and expressions
New words and expressions
New words and expressions
except prep.
• used to introduce the only person, thing, action, fact, or situation about which a statement is not true
• Had he often dreamed of retiring in England? • Yes, he had.
Comprehension questions
• Where had he planned to settle down? • In the country.
新概念英语第二册第38课 ppt课件
新概念英语第二册第38课
2.Mediterranean n. 地中海 the Mediterranean 3. Complain v. complain to sb. 向某人抱怨 Don`t complain to anyone when you make mistakes. 向某人抱怨某事 complain of/about sth to sb Complain about和complain of 区别： Complain about多用于对你不满意的事情“抱怨”，而complain of多用于“
新概念英语第二册第38课
新概念英语第二册第38课
新概念英语第二册第38课
How is the weatheБайду номын сангаас today?
新概念英语第二册第38课
Moscow
Beijing
Shanghai
Toronto Boston
新概念英语第二册第38课
新概念英语第二册第38课
新概念英语第二册第38课
frost（霜）. The two worst months in England are
January and February. They have many cold wet days one after another.
新概念英语第二册第38课
英国属海洋性气候，具有冬暖夏凉的特点,冬夏 没有很大差别，这主要是因为它是一个岛屿国 家。(冬天,海洋比陆地温度高，海风将热量带到 陆地，导致陆地温度升高，夏天则相反）.西风 常常吹过英国大陆，致使常年有雨.
the summer, the warmer the sun shines. It’s warmer. The nearer the winter, the colder the days are. In winter they have all kinds of weather. Sometimes it rains and sometimes it snows heavily, and they also have fog and
2.Mediterranean n. 地中海 the Mediterranean 3. Complain v. complain to sb. 向某人抱怨 Don`t complain to anyone when you make mistakes. 向某人抱怨某事 complain of/about sth to sb Complain about和complain of 区别： Complain about多用于对你不满意的事情“抱怨”，而complain of多用于“
新概念英语第二册第38课
新概念英语第二册第38课
新概念英语第二册第38课
How is the weatheБайду номын сангаас today?
新概念英语第二册第38课
Moscow
Beijing
Shanghai
Toronto Boston
新概念英语第二册第38课
新概念英语第二册第38课
新概念英语第二册第38课
frost（霜）. The two worst months in England are
January and February. They have many cold wet days one after another.
新概念英语第二册第38课
英国属海洋性气候，具有冬暖夏凉的特点,冬夏 没有很大差别，这主要是因为它是一个岛屿国 家。(冬天,海洋比陆地温度高，海风将热量带到 陆地，导致陆地温度升高，夏天则相反）.西风 常常吹过英国大陆，致使常年有雨.
the summer, the warmer the sun shines. It’s warmer. The nearer the winter, the colder the days are. In winter they have all kinds of weather. Sometimes it rains and sometimes it snows heavily, and they also have fog and
新概念英语第二册课件Lesson38(共30页)
govern
说出有关“大”的单词 immense\great\big\large
翻译：为…设立标准
set standard for
….的首都是
the capital of （国家）is
打算做某事
be going to do sth will do sth
be intended to do sth plan to do sth
5、He acted as if he had never lived
in England before. as if+句子 似乎, 好像（引导表示方式 的状语从句，如果从句为过去完成时 则是虚拟语气，描述与事实相反, 后
面的条件是假的） He acted as if he was poor. (as if 后 是真是假, 应根据上下文来看)连词as if/though引导方式状语从句，通常跟 在描述行为举止的动词之后，如act， appear，feel，look，smell，sound
He made us disappointed. I won’t believe
him any more.
He is my idol and the pride of our
Chinese.
Everybody ___w_il_l _b_e_w__a_tc_h_in_g___ anxiously as the new buildings go up. We are all very ____e_x_c_it_e_d________ and are_____l_o_o_k_in_g_f_o_r_w_a_rd__to___ the Olympic Games because they __h_a_v_e__n_e_v_e_r _b_e_h_e_l_d__before in this country.
新概念英语第二册Lesson38课件
3. He had no sooner returned than he bought a house and went to live there. no sooner...than.... 一...就... 引导时间状语从句
主句（no sooner）——过去完成时
从句（than）——一般过去时
11、The dream he had had for so many years ended here.
定语从句-先行词-the dream
10、He had hardly had time to settle down when he sold the house and left the country. =Hardly had he had time to settle down when he sold the house and left the country.
She got a shock when she see the telephone bill. 她看到电话帐单大吃一惊。
8、He acted as if he had never lived in England before.
as if 引导方式状语从句，似乎，好像 Like many nightmares, this one feels as if it will never end. 如同许多噩梦一样，这个看起来也像不会终结似 的。
I__h_a_d__no sooner__re_a_c_h_ed___the home than
it__b_e_g_an___to rain.
我一到家就下起雨来。
No sooner…than…放于句首--倒装 No sooner_h_a_d__I_reached home than it began to rain.{谓语提前} 与no sooner ……than…… 类似的句型有： hardly…when…还没…就…引导时间状语从句 主句：hardly——过去完成时 从句：when——一般过去时 我们还没到那天就下起雨了。
新概念英语第二册课件Lesson38(共36页)
1.They will hold the Olympic Games next year.
2.I will pay for the car in 3 months’ time.
3.They will finish the bridge next year.(by the end of next year.)
• After we _______h_a_d_h_a_d_o_u_r_t_es_t_s _____, we ______ha_d__a_lo_n_g_h_o_li_d_a_y___________
15.He showed us a picture. Then he showed us around the house. 用过去完成时连接两句)
13.Jim’s father mended the car. It was broken. （用过去 完成时连接两句） The car had been broken before Jim's father mended it.
14.We had our tests. Then we had a long holiday.( 用过去 完成时连接两句)
6. no sooner …than （更正式） as soon as 一…就…
常与过去完成时，一般过去时连用
Eg:I had no sooner taken my seat than he began to complain.
7. as if=as though ①陈述式：as if/as though 后面的句子
文中 ‘as if he had never lived in England before’ 用的就是虚拟的表达，用了 ‘have never lived’的过去式 ‘had never lived’,说明Harrison 以前是住在英国。
新概念英语第二册38课ppt课件
.
6.He acted as if he had never lived in England before.
As if表示“象…一样”。常用来引导表示方式的状 语从句。As if也可以用as though代替，意思是一 样的。在用法上，as if/as though后面句子的时态 有两种，一种是陈述式。一种是虚拟式（一般是 在陈述式基础上将助动词变成过去式形式。）
8. He had hardly had time to settle down when he sold the
house and left the country.
• 句中使用了“hardly…when”结构。这里我们 结合“no sooner…than…”一起来讲：
• 【no sooner…than… & hardly…when…】 的用法：
如：He gets up early everyday except Sunday. 除星期天外，他每天早起。
except for： 它的宾语与前述对象完全是两回 . 事。例如：The room was very cold and,
单词解析：
2.Mediterranean n. 地中海 the--3. Complain v. complain to sb.向某人抱怨 Don`t complain to anyone when you make
For在这里为连词，意思是“因为”。它与 because不同，不能用于句首
even though引导的是让. 步状语从句，表示“即 使”、“虽然”。也可以写为“though”，不过
5. After so many years of sunshine, Harrison got a shock.
6.He acted as if he had never lived in England before.
As if表示“象…一样”。常用来引导表示方式的状 语从句。As if也可以用as though代替，意思是一 样的。在用法上，as if/as though后面句子的时态 有两种，一种是陈述式。一种是虚拟式（一般是 在陈述式基础上将助动词变成过去式形式。）
8. He had hardly had time to settle down when he sold the
house and left the country.
• 句中使用了“hardly…when”结构。这里我们 结合“no sooner…than…”一起来讲：
• 【no sooner…than… & hardly…when…】 的用法：
如：He gets up early everyday except Sunday. 除星期天外，他每天早起。
except for： 它的宾语与前述对象完全是两回 . 事。例如：The room was very cold and,
单词解析：
2.Mediterranean n. 地中海 the--3. Complain v. complain to sb.向某人抱怨 Don`t complain to anyone when you make
For在这里为连词，意思是“因为”。它与 because不同，不能用于句首
even though引导的是让. 步状语从句，表示“即 使”、“虽然”。也可以写为“though”，不过
5. After so many years of sunshine, Harrison got a shock.
新概念英语二lesson 38课(共39张PPT)
• • • • • • bitter adj a. 生气、沮丧 对于失去工作他们感到非常的生气。 They are very bitter about losing the jobs. b. 苦的 那药尝起来是苦的。 The medicine tasted bitter. c. 表示“令人不舒服的冷、刺骨的冷”。 课文中bitterly cold是“副词＋形容词”的用法， 同样是表示“非常冷、令人不舒服的冷、刺骨的 冷”的意思。 • bitterly disappointed 彻底的失望
瑞雪兆丰年
Complain 抱怨
★complain v. 抱怨
• complain to sb. 向某人抱怨 • complain of/about sth. 抱怨某事 • • • • 我们没有什么可发牢骚的 We have nothing to complain of. 不要向我抱怨了！ Don't complain to me !
★continuously adv. 不断地，连续地 （指动作中间没有间断） • 你不许连续看很长时间的电视。 • You mustn’t watch TV for such a long time continuously. • 这架飞机可以连续飞行20小时。 • This plane can fly continuously for twenty hours. • • • • • • continually adv. 频繁地，反复地 （指动作中间有间断但又持续很久） 天频繁地下雨。 It rained continually. 小婴儿不停地哭。 The baby cries continually.
• L38 Everything except the weather
瑞雪兆丰年
Complain 抱怨
★complain v. 抱怨
• complain to sb. 向某人抱怨 • complain of/about sth. 抱怨某事 • • • • 我们没有什么可发牢骚的 We have nothing to complain of. 不要向我抱怨了！ Don't complain to me !
★continuously adv. 不断地，连续地 （指动作中间没有间断） • 你不许连续看很长时间的电视。 • You mustn’t watch TV for such a long time continuously. • 这架飞机可以连续飞行20小时。 • This plane can fly continuously for twenty hours. • • • • • • continually adv. 频繁地，反复地 （指动作中间有间断但又持续很久） 天频繁地下雨。 It rained continually. 小婴儿不停地哭。 The baby cries continually.
• L38 Everything except the weather
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• ★continuously adv. 不断地，连续地（指动作中间没 有间断）
• You mustn’t watch TV for such a long time continuously.
• This plane can fly continuously for twenty hours. • continually adv. 频繁地，反复地（指动作中间有间
• 后面的从句用一般过去时 • had no sooner done…than +一般过去时, 固定
用法 (时态结构: 完成时态+ than + 一般过去 时)
• He had no sooner arrived than he called me up.
• no sooner 放在句首就要倒装
• No sooner had he arrived than he called me up. (倒装)
If you have ever been to England ,you must be impressed by the beautiful scenery.However,everyhing there is perfect except the weather.
• ★complain v. 抱怨 • complain to sb. 向某人抱怨 • complain of/about sth. 抱怨某事
• immediately
• 1.adv • He lay down and was asleep immediately. • All those who are immediately involved
will be informed of the decision.
• 2.conj. • I will tell him the news immediately he
• I can't afford it. ＝ It is more than I can afford.
• hardly…when… 还没来得及……就……，用 法同no sooner…than
• hardly had sb. done when… (hardly在 句首, 要倒装)
• He had hardly opened his eyes when he was knocked out.（knock out : 打晕 , 击倒）
• 那么，在一次抽样中，参数的估计值与真值 的差异有多大，是否显著，这就需要进一步进 行统计检验。
• 主要包括拟合优度检验、变量的显著性检验 及参数的区间估计。
一、拟合优度检验
拟合优度检验：对样本回归直线与样本 观测值之间拟合程度的检验。
度量拟合优度的指标：判定系数（可决 系数）R2
问题：采用普通最小二乘估计方法，已 经保证了模型最好地拟合了样本观测值， 为什么还要检验拟合程度？
1、总离差平方和的分解
已知由一组样本观测值（Xi,Yi），i=1,2…,n 得到如下样本回归直线
Yˆi ˆ0ˆ1Xi
y i Y i Y ( Y i Y ˆ i) ( Y ˆ i Y ) e i y ˆ i
新概念英语第二册-38课
1.What is your favourite
warming up city?
2.How is the weather there? 3.Have you ever been to England? 4.Do you know the climate in England?
断但又持续很久） • It rained continually. 天频繁地下雨。 • The river flows under this bridge continuously. 河
水不停地从桥下流过.
• ★bitterly adv. 刺骨地 • bitterly disappointed 彻底的失望（
gets back. • （directly，instantly）
§2.3 一元线性回归模型的统 计检验
一、拟合优度检验 二、变量的显著性检验 三、参数的置信区间
• 回归分析是要通过样本所估计的参数来代替总 体的真实参数，或者说是用样本回归线代替总 体回归线。
• 尽管从统计性质上已知，如果有足够多的重 复 抽样，参数的估计值的期望（均值）就等 于其总体的参数真值，但在一次抽样中，估计 值不一定就等于该真值。
连词as if/though引导方式状语从句，通常跟在描述 行为举止的动词之后，如act，appear，feel，look， smell，sound等后面： She acted as if she were mad. （虚拟语气） It feels as if/though it’sad he got into the bus when it began moving.
•as if( sometimes subjunctive mood )
•He acts as if he knew me.(事实上并不知道我) •They treat me as if I were a stranger. （我并不 是陌生人） •It looks as if it is going to rain (天要下雨)
disappoint vt.使失望）
• I am bitterly disappointed. • bitterly cold 刺骨地寒冷 • It’s bitterly cold. （chilly adj. 寒冷的）
• no sooner…than… 一……就……（关联词，引导 时间状语从句，主句里常用过去完成时，than
• No sooner had he begun speaking than he was interrupted.
• more than 表示“超过……的范围”
• This piece of news is more than I can believe.
• It was more than I could understand.
• You mustn’t watch TV for such a long time continuously.
• This plane can fly continuously for twenty hours. • continually adv. 频繁地，反复地（指动作中间有间
• 后面的从句用一般过去时 • had no sooner done…than +一般过去时, 固定
用法 (时态结构: 完成时态+ than + 一般过去 时)
• He had no sooner arrived than he called me up.
• no sooner 放在句首就要倒装
• No sooner had he arrived than he called me up. (倒装)
If you have ever been to England ,you must be impressed by the beautiful scenery.However,everyhing there is perfect except the weather.
• ★complain v. 抱怨 • complain to sb. 向某人抱怨 • complain of/about sth. 抱怨某事
• immediately
• 1.adv • He lay down and was asleep immediately. • All those who are immediately involved
will be informed of the decision.
• 2.conj. • I will tell him the news immediately he
• I can't afford it. ＝ It is more than I can afford.
• hardly…when… 还没来得及……就……，用 法同no sooner…than
• hardly had sb. done when… (hardly在 句首, 要倒装)
• He had hardly opened his eyes when he was knocked out.（knock out : 打晕 , 击倒）
• 那么，在一次抽样中，参数的估计值与真值 的差异有多大，是否显著，这就需要进一步进 行统计检验。
• 主要包括拟合优度检验、变量的显著性检验 及参数的区间估计。
一、拟合优度检验
拟合优度检验：对样本回归直线与样本 观测值之间拟合程度的检验。
度量拟合优度的指标：判定系数（可决 系数）R2
问题：采用普通最小二乘估计方法，已 经保证了模型最好地拟合了样本观测值， 为什么还要检验拟合程度？
1、总离差平方和的分解
已知由一组样本观测值（Xi,Yi），i=1,2…,n 得到如下样本回归直线
Yˆi ˆ0ˆ1Xi
y i Y i Y ( Y i Y ˆ i) ( Y ˆ i Y ) e i y ˆ i
新概念英语第二册-38课
1.What is your favourite
warming up city?
2.How is the weather there? 3.Have you ever been to England? 4.Do you know the climate in England?
断但又持续很久） • It rained continually. 天频繁地下雨。 • The river flows under this bridge continuously. 河
水不停地从桥下流过.
• ★bitterly adv. 刺骨地 • bitterly disappointed 彻底的失望（
gets back. • （directly，instantly）
§2.3 一元线性回归模型的统 计检验
一、拟合优度检验 二、变量的显著性检验 三、参数的置信区间
• 回归分析是要通过样本所估计的参数来代替总 体的真实参数，或者说是用样本回归线代替总 体回归线。
• 尽管从统计性质上已知，如果有足够多的重 复 抽样，参数的估计值的期望（均值）就等 于其总体的参数真值，但在一次抽样中，估计 值不一定就等于该真值。
连词as if/though引导方式状语从句，通常跟在描述 行为举止的动词之后，如act，appear，feel，look， smell，sound等后面： She acted as if she were mad. （虚拟语气） It feels as if/though it’sad he got into the bus when it began moving.
•as if( sometimes subjunctive mood )
•He acts as if he knew me.(事实上并不知道我) •They treat me as if I were a stranger. （我并不 是陌生人） •It looks as if it is going to rain (天要下雨)
disappoint vt.使失望）
• I am bitterly disappointed. • bitterly cold 刺骨地寒冷 • It’s bitterly cold. （chilly adj. 寒冷的）
• no sooner…than… 一……就……（关联词，引导 时间状语从句，主句里常用过去完成时，than
• No sooner had he begun speaking than he was interrupted.
• more than 表示“超过……的范围”
• This piece of news is more than I can believe.
• It was more than I could understand.