(完整版)新概念英语第二册:第7课课文详解及语法解析
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新概念第二册第7课知识点总结嘿!今天咱们来好好总结一下新概念第二册第7 课的知识点呀!先来说说词汇部分呢。
这一课出现了不少实用的单词,比如“detective”这个词,意思是“侦探”。
哎呀呀,想象一下那些聪明机智的侦探形象,是不是很有趣?“airport”,“机场”,这可是个常见的地方呀。
还有“expect”,“期待,盼望”,我们在生活中经常会有期待的事情呢。
语法方面呀,这一课重点学习了过去进行时。
过去进行时表示过去某个时刻正在进行的动作。
比如说“He was waiting for a telegram.” 这里的“was waiting”就是过去进行时。
哇!是不是感觉一下子清晰了很多?要注意过去进行时的构成是“was/were + 动词的现在分词”。
再看看课文中的句子,“The plane was late and detectives were waiting at the airport all morning.” 哎呀呀,这里就很清楚地展示了过去进行时的用法。
通过这个句子,我们能更好地理解过去进行时所表达的那种持续的状态。
还有呀,这课中的短语也很重要呢。
“at the airport”,“在机场”,“all morning”,“整个上午”,这些短语在日常表达中都很常用呀。
关于句子结构,课文中有不少值得我们学习的地方。
比如说长句的运用,让表达更加丰富和准确。
“They were expecting a valuable parcel of diamonds from South Africa.” 这个句子不仅语法正确,而且逻辑清晰。
哎呀呀,学习这一课的知识点,对于我们提升英语能力可是很有帮助的呢!我们要多做练习,加深对这些知识点的理解和运用。
再来说说这课的听力部分。
通过听力练习,我们能更好地熟悉单词的发音和句子的语调。
哇!这样对于我们的口语表达也会有很大的提升呀!在阅读方面,认真阅读课文,理解其中的意思,还能培养我们的阅读理解能力。
Lesson 7 Too late为时太晚The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamond from South Africa. A few hours earlier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. Two men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, two others opened the parcel. To their surprise, the precious parcel was full of stones and sand!单词vocabulary:1.detective n. 侦探,警探2.airport n. 机场 port 港口,口岸 air 空气3.expect v. 1)期待,等待 expectation n.He doesn’t expect his girlfriend’s coming at all.2)预料,预期,预计I did not expect the rain.4.valuable adj. 贵重的;有价值的 value n. 价值—> a valuable painting; a valuable information5.parcel n. 包裹6.diamond n. 钻石7.steal v. 偷(过去式:stole; 过去分词:stolen)8.main adj. 主要的the main reason 主要的原因; the main problem 主要的问题;the main thing 最重要的事9.airfield n. 飞机起落的场地10.guard n. 警戒,守卫 v. 守卫11.precious adj. 珍贵的—> precious time 宝贵的时间12.stone n. 石子13.sand n. 沙子知识点language points:1.过去将来时would(will 的过去式)+动词原形was/ were going somewhere/to do sth.for example:He told me that he would go to Beijing next month.I wouldn’t say that if I knew your story.I was going to meet my friend when it suddenly rained.2. 过去进行时: was/ were doing……3. while 当……的时候 (一般有时间的持续)for example:My father was playing computer games while my mother was cooking.—> 两个同时持续动作While I was doing my homework, my mom came in and gave me some fruits.They arrived while we were having dinner.While we were talking and laughing loudly, the teacher came in.—> 一个短暂动作发生在一个持续动作中while 和 when 的辨析:We were talking and laughing when the teacher came in. —> 处在时间点的动作While we were talking and laughing loudly, the teacher came in. —> 处在时间段的动作用when或while填空1. _____ the teacher came in, we were talking._____ we were talking, the teacher came in.2. He was driving along ____ suddenly a woman appeared.3. ____ Jack was waiting at the door, an old woman called to him.4. He was reading a book ____ suddenly the telephone rang.5. ____ it began to rain, they were playing chess.6. She saw a taxi coming ____ the she was waiting.7. While Jack _________(look) for customers, he _______(see) an old man.8. John __________(sleep) when someone_____(steal) his car.9. He is strong_____ his brother is weak.10. The children were running to move the bag of rice ______ they heard the s ound of a motorbike.。
Lesson 7 Too late 为时太晚 ⼀、单词讲解 1、detective n. 侦探 detective story 侦探⼩说 2、airport n. 机场 airfield n. 飞机起落的场地 port 港⼝;airport航空港 field ⽥野;airfield 停机坪 at the airport on the airfield 3、expect v. 期待,等待 except 除……之外 expect/ik'spekt/ v. 期待,等待 I think so. I expect so.我希望如此[⼝语] expect sb.to do sth.期待某⼈做某事 expect sth.及物动词:I expect your letter. I expect you to write back. wait for sth./wait for sb.不及物动词 expect:⼼理上的等待 wait for:动作上的等待 I wait for my mother. I expect my mother to come back. 4、valuable adj. 贵重的 precious adj. 珍贵的 value n.---valuable adj.有价值的 sth.is valuable/sth.is precious precious 带有感情⾊彩的 precious photo 珍贵的照⽚ price 价格;priceless adj.-less 表否定;没有价格的,⽆价的 valueless adj. 没有价值,不⾜道的 worth 值:worthless adj. ⽆价值的 5、diamond n. 钻⽯ precious stone 宝⽯ crystal ⽔晶; jade ⽟ diamond ring 钻⽯戒指 6、steal v. 偷 steal,stole,stolen steal sth. 偷(某物) rob sb. 抢(某⼈) My wallet was stolen. I was robbed. rob the bank 7、main adj. 主要的 main building; main street main sentence; main idea 不与⼈连⽤ 8、guard n. 警戒,守卫 life guard 救⽣员/body guard 保镖 ⼆、语法重点--宾语 1、v.+prep.介词+宾语 come and look at... I am looking for... 2、 v.+prep. 介词/adv.代表不同的意思 look at 看;look after照料 3、v.+prep./adv.+宾语(n.) v.+宾语(n./pron.)+prep./adv. take off the coat……take the coat off/take it off coat n.作宾语 put on your shoes/put your shoes on/put them on 笔记: 宾语的位置和词性取决于施加动作的动词(在乐加乐学过新⼆的孩⼦应该知道宾语的构成和位⼦) 介词出现,⼀定要有宾语,所以 v.+prep.+宾语(n.) 副词可省略.v.+宾语(n./pron.)+adv. 或 v.+adv.+宾语(n.) at,after prep; off adv. vt.+宾语 vi.+prep.+宾语 take vt./look vi. I always take money with me. 附上及物动词和不及物动词讲解: A 有些动词只是及物动词; 它们不可以单独⽤,后⾯必须跟宾语。
新概念英语第二册第7课课文详解及语法解析课文详注 Further notes on the text1.…detectives were waiting at the airport all morning. ……侦探们在机场等了整整一上午。
all 一般直接加表示时间的单数名词构成副词短语,如:all day (整整一天),all night(整夜),all week(整星期),allwinter(整个冬天),all year(整年)等。
但不说all hour。
whole在表达同样的意思时一般要加冠词或数词,如:a whole day/ year(一整天/年),two whole weeks(整整两星期)。
2.…someone had told the police that thieves would try to steal the diamonds. ……有人向警方报告,说有人企图偷走这些钻石。
that后面的部分为动词tell的宾语从句。
从句中的时态为过去将来时(would)。
3.When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. 当飞机到达时,一些侦探等候在主楼内,另一些侦探则守候在停机坪上。
(1)这个长句子由3个部分组成:when引导的是整个句子的时间状语从句;some of…building为主句;while 引导的是动作与主句的动作同时实行的时间状语从句。
while作为连词表示“和……同时”、“当……时候”时常常引导一个过去实行时从句。
(cf. 本课语法)(2)地点状语 on the airfield 与第一句中的 at the airport 意义相近。
注意介词on和at的不同搭配。
新概念英语第二册:第7课课文详解及语法解析课文详注Further notes on the text1.…detectives were waiting at the airport allmorning. ……侦探们在机场等了整整一上午。
all一般直接加表示时间的单数名词构成副词短语,如:allday (整整一天),all night(整夜),all week(整星期),allwinter(整个冬天),all year(整年)等。
但不说all hour。
whole在表达同样的意思时一般要加冠词或数词,如:a wholeday/ year(一整天/年),two whole weeks(整整两星期)。
2.…someone had told the police that thieves would tryto steal the diamonds. ……有人向警方报告,说有人企图偷走这些钻石。
that后面的部分为动词tell的宾语从句。
从句中的时态为过去将来时(would)。
3.When the plane arrived, some of the detectives werewaiting inside the main building while others were waiting onthe airfield.当飞机到达时,一些侦探等候在主楼内,另一些侦探则守候在停机坪上。
(1)这个长句子由3个部分组成:when引导的是整个句子的时间状语从句;some of…building为主句;while引导的是动作与主句的动作同时实行的时间状语从句。
while作为连词表示“和……同时”、“当……时候”时常常引导一个过去实行时从句。
(cf.本课语法)(2)地点状语on the airfield与第一句中的at the airport意义相近。
注意介词on和at的不同搭配。
(3)代词others常常和some连用,表示“有些(人)……,也有些(人)……”或者“有的……,其余的……”:Some students are very hard-working, others are not.有些学生非常用功,有些则不然。
【New words and expressions】生词和短语(5)competition n. 比赛,竞赛neat adj. 整齐的,整洁的path n. 小路,小径wooden adj. 木头的pool n. 水池★competition n. 比赛,竞赛(暗地里的竞争)race n. 比赛,竞赛car racematch n. 比赛football matchcontest n. 比赛(更广泛)baby contest 宝宝大赛;beauty contest 选美game : 游戏, 运动★neat adj. 整齐的, 整洁的,井井有条clean adj. 干净的neat=tidy <adj.> tidy <v.> (up) the room 整理房间★pool n. 水池(人工的) swimming pool 游泳池pond 池塘(天然的)《golden pond》—金色池塘【课文讲解】1、Joe Sanders has the most beautiful garden in our town. Joe's garden is the most beautiful.Bill's garden is the largest. Bill’s garden is larger than Joe’s.(比较的东西都是同类的事物joe’s 的“’s”不能省略)2、Nearly everybody enters for 'The Nicest Garden Competition' each year, but Joe wins every time.nearly和almost意义相似,表示“几乎”、“差不多”、“差点儿”的意思。
I have nearly forgotten his name. 我差点把他的名字忘了。
I’m nearly/almost ready. 我快准备好了。
(完整版)新概念英语第二册:第7课课文详解及语法解析新概念英语第二册:第7课课文详解及语法解析课文详注 Further notes on the text1.…detectives were waiting at the airport all morning. ……侦探们在机场等了整整一上午。
all 一般直接加表示时间的单数名词构成副词短语,如:all day (整整一天),all night(整夜),all week(整星期),allwinter(整个冬天),all year(整年)等。
但不说all hour。
whole在表达同样的意思时一般要加冠词或数词,如:a whole day/ year(一整天/年),two whole weeks(整整两星期)。
2.…someone had told the police that thieves would try to steal the diamonds. ……有人向警方报告,说有人企图偷走这些钻石。
that后面的部分为动词tell的宾语从句。
从句中的时态为过去将来时(would)。
3.When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. 当飞机到达时,一些侦探等候在主楼内,另一些侦探则守候在停机坪上。
(1)这个长句子由3个部分组成:when引导的是整个句子的时间状语从句;some of…buil ding为主句;while 引导的是动作与主句的动作同时实行的时间状语从句。
while作为连词表示“和……同时”、“当……时候”时常常引导一个过去实行时从句。
(cf. 本课语法)(2)地点状语 on the airfield 与第一句中的 at the airport 意义相近。
新概念第二册第七课讲解Lesson 7 Too late【New words and expressions】(13)★detective n. 侦探detective story 侦探小说★airport n. 机场★airfield n. 飞机起落的场地port 港口;airport 航空港at the airport 在机场field 田野;airfield 停机坪on the airfield 在停机坪上★expect v. 期待, 等待① vt.&vi. 预计,预料Jim has failed in mathematics as his teacher expected.正如他老师所预料的那样,吉姆数学考试没及格。
② vt. 等待,期待,盼望(心理上的等待)They are expecting guests tonight. 今晚有人要去他们那里作客。
expect所表示的等待一般暗含着根据某些信息或规律而作出相应反应的意思,而wait for主要接续“等待”这个动作本身。
expect sth.I expect a letter from Jimmy.expect sb.to do sth. 期待某人做某事I expect you to write back.I expect my mother to come back.wait for sth./sb. 动作上的等待I wait for my mother.③ vt. 认为,猜想(一般用于口语)I expect so./I think so. 我希望如此[口语]I expect you’ve heard the news. 我想你已经听到这个消息了。
★valuable adj. 贵重的★precious adj. 珍贵的value n.&v. 价值;valuable adj.有价值的sth.is valuable/sth.is preciousprecious adj. 珍贵的(带有一定的感情色彩)precious photo 珍贵的照片-less 表否定;priceless adj. 没有价格的, 无价的valueless adj. 没有价值, 不足道的worthless adj. 无价值的★diamond n. 钻石diamond ring 钻石戒指precious stone 宝石;crystal 水晶;jade 玉★steal(stole,stolen) v. 偷① vt.&vi. 偷盗,行窃英语中“偷”用steal和rob来表达,宾语是物,用steal;宾语是人,用rob;跟地点相连,也用robsteal sth. 偷(某物)My wallet was stolen.John never steals. 约翰从不偷东西。
新概念二册7课讲解《新概念英语(第二册)》是一本针对英语初学者的教材,共有96课。
根据你的问题,我将为你解析第二册中的第七课。
第二册第七课的标题是"Are you a teacher?"(你是老师吗?)。
这一课主要围绕着一个关于职业的对话展开,通过对话的形式来学习询问和回答他人的职业。
以下是对这一课的多角度全面完整的回答:1. 对话内容解析:这一课的对话是由两个人进行的,他们是Peter和Ann。
对话开始时,Peter询问Ann是否是一名老师,然后Ann回答并解释她的职业。
随后,Peter继续问Ann是否在学校教书,并询问她教授的科目。
对话中还涉及到一些关于教育的问题,如学生和老师之间的关系等。
2. 语法点分析:在这一课中,我们学习了一些关于职业的特殊疑问句和回答的用法。
例如,询问职业的句子结构是,"Are you a + 职业名词?",回答可以是"Yes, I am."或"No, I'm not."。
此外,对话中还出现了一些其他的语法点,如一般现在时的用法以及一些特殊疑问词的运用等。
3. 生词解析:在这一课中,出现了一些生词,如teacher(老师)、school(学校)、subject(科目)等。
通过学习这些生词,我们可以扩展我们的词汇量,并且能够更好地理解对话内容。
4. 对话背景分析:这一课的对话背景是在一个社交场合,两个人进行了一段关于职业的对话。
这种对话场景可以帮助我们更好地理解在实际生活中如何进行类似的交流,并且可以为我们提供一些实用的表达方式。
5. 学习目标:这一课的学习目标是学习如何询问他人的职业以及如何回答这个问题。
通过学习这一课,我们可以掌握一些基本的职业词汇,并且能够在日常生活中进行简单的职业相关的对话。
总结起来,第二册第七课是一堂关于职业的英语课,通过对话的形式帮助学习者学习如何询问他人的职业以及如何回答这个问题。
新概念英语第二册:第5-7课课文详解及语法解析假如你也想学好英语,又怎能错过新概念英语?今日给大家带来新概念英语其次册:课文详解及语法解析,盼望可以关心到大家,下面就和大家共享,来观赏一下吧。
新概念英语其次册:第5课课文详解及语法解析课文详注Further notes on the text1.Pinhurst is only five miles from Silbury, but Mr. Scott cannot get a telephone for his new garage, so he has just bought twelve pigeons. 平赫斯特离锡尔伯里只有5英里,但詹姆斯·斯科特先生未能为他新的汽车修理部搞到一部电话机,所以他买了12只鸽子。
(1)这句话由3个部分组成。
but引导的句子与前面的句子为并列关系,so引导的句子表示结果。
(2)from 在这里表示距离上相隔,译为“离”、“从”等:The school is a mile (away) from my house.学校离我家有一英里。
She has been away from home for 5 days now.她离家已有5天了。
2.Yesterday, a pigeon carried the first message from Pinhurst to Silbury.昨天,一只鸽子把第一封信从平赫斯特带到锡尔伯里。
(1)from…to…表示从一个地方到另一个地方。
如下文中的from one garage to the other。
这个短语中挨次比较重要,不能搞错方向:He flew from Beijing to Moscow.他从北京坐飞机去莫斯科。
He looked at the girl from head to foot.他把这姑娘从头到脚端详了一下。
The news spread from house to house.家家户户都得知了这条消息。
Lesson 7 Too late为时太晚The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds from South Africa. A few hours earlier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. Two men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, two others opened the parcel. To their surprise, the precious parcel was full of stones and sand!New words and expressions 生词和短语1. detective n. 侦探airport n. 机场expect v. 期待,等待valuable adj. 贵重的parcel n. 包裹diamond n. 钻石steal v. 偷2. main adj. 主要的airfield n. 飞机起落的场地guard n. 警戒,守卫precious adj. 珍贵的stone n. 石子sand n. 沙子参考译文飞机误点了,侦探们在机场等了整整一上午。
Lesson 7 Too Late过去进行时用法总结was/were+doing1.表示在过去某个时刻正在发生或进行的动作。
He was having breakfast at six o’clock yesterday morning. Were you at home at nine last night? Yes, I was watching TV.2.表示在过去某个时间段一直发生或进行的动作I first met Tom three years ago. He was working in a school at the time.在那时You didn’t go to Tom’s birthday party yesterday? No, I was looking after my little sister because my mother went to work.3.表示一个动作发生或进行时,另一个动作正在进行。
常用when/while/as引导在……时候I was doing my homework when my mother came in.Tom was sleeping in class while others were listening to the teacher carefullyAs I was walking on the street, I met my good friend, Tim.当两个动作同时发生时,延续性动作用过去进行时、短暂性动作用一般过去时•When/while/as都表示当……的时候, 区别在于:•while+从句,动作一定会是延续性的,过去进行时•While I was playing computer games, my mother camein.•when+从句,动作可为延续性动作或瞬间(短暂性)动作过去进行时、一般过去时•When Alice came in, we were playing games.•When we were having a walk in the square, it began to rain.•As+ 从句,动作也常为延续性动作过去进行时•As they were leaving, the postman arrived.•while 用在句子中间表示对比“而”•My mom was cooking while my Dad was watering the garden.。
新概念二Lesson7知识点整理Lesson 7 Too late 为时太晚学习目标全解必记单词detective n. 侦探airport n. 机场expect v. 期待,等待valuable adj. 贵重的parcel n. 包裹diamond n. 钻石steal v. 偷main adj. 主要的airfield n. 飞机起落的场地guard n. 警戒,守卫precious adj. 珍贵的stone n. 石子sand n. 沙子常考短语be too…to…太而不能detective story 侦探小说at the airport 在机场on the airfield 在停机坪上I think so. 我认为是这样。
I expect so.我希望如此[口语]expect sb. to do sth. 期待某人做某事wait for sth./sb. 动作上的等待keep guard 守望,警戒= stand guardto their surprise 使他们吃惊的是be full of 充满= be filled with经典句型1.They were expecting a valuable parcel of diamonds fromSouth Africa.2. Thieves would try to steal the diamonds.3. Two men took the parcel off the plane and carried it into theCustoms House.4. To their surprise, the precious parcel was full of stones andsand!重点语法过去进行时过去进行时的构成:be的过去式+现在分词过去进行时和一般过去时经常同在一个句子里使用。
过去进行时表示过去正在进行的动作或情况,一般过去时则表示比较短暂的动作或事件。
新概念英语第二册:第7课课文详解及语法解析
课文详注 Further notes on the text
1.…detectives were waiting at the airport all morning. ……侦探们在机场等了整整一上午。
all 一般直接加表示时间的单数名词构成副词短语,如:all day (整整一天),all night(整夜),all week(整星期),all
winter(整个冬天),all year(整年)等。
但不说all hour。
whole在表达同样的意思时一般要加冠词或数词,如:a whole day/ year(一整天/年),two whole weeks(整整两星期)。
2.…someone had told the police that thieves would try to steal the diamonds. ……有人向警方报告,说有人企图偷走这些钻石。
that后面的部分为动词tell的宾语从句。
从句中的时态为过去将来时(would)。
3.When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. 当飞机到达时,一些侦探等候在主楼内,另一些侦探则守候在停机坪上。
(1)这个长句子由3个部分组成:when引导的是整个句子的时间状语从句;some of…building为主句;while 引导的是动作与主句的动作同时实行的时间状语从句。
while作为连词表示“和……同时”、“当……时候”时常常引导一个过去实行时从句。
(cf. 本课语法)
(2)地点状语 on the airfield 与第一句中的 at the airport 意义相近。
注意介词on和at的不同搭配。
(3)代词others常常和some连用,表示“有些(人)……,也有
些(人)……”或者“有的……,其余的……”:
Some students are very hard-working, others are not.
有些学生非常用功,有些则不然。
Some of the novels are interesting, (the) others are not.
在这些小说中,有些很有趣,其他的则不然。
4.keep guard 守望,警戒
与 stand guard(站岗,放哨)意思相近:
Two thieves kept guard around the house while the others entered it.
两个小偷在屋子外面守着,其他的则进了屋。
They kept a close guard over the thieves.
他们对小偷们严加看管。
5.to their surprise 令他们吃惊的是
这个短语中的所有格形容词their也能够换成其他所有格形容词:(much) to my/ his surprise, to our surprise 等。
一般不说 to your surprise。
语法 Grammar in use
1.过去实行时(The past progressive tense)
构成:be的过去式+现在分词(注意现在分词的构成)
(1)过去实行时主要表示过去某个时刻或某段时间正在实行的动作。
过去实行时和一般过去时经常同在一个句子里使用。
过去实行时
表示过去正在实行的动作或情况,一般过去时则表示比较短暂的动作
或事件。
正在实行中的动作或情况往往由连词 when, while, as,
just as等引导:
While/ When/ As I was sweeping the floor, I found your pen.
我扫地的时候,发现了你的钢笔。
while通常只引导持续时间较长的动作,并且主句和从句能够同时用过去实行时,而when和as一般不这么用:
John was watching TV while his wife was talking with a neighbour over the phone.
当他的妻子和一位邻居在电话中聊天时,约翰一直在看电视。
Some students were dancing and singing while others were eating and drinking.
有些学生在唱歌跳舞,而另一些则在吃喝。
Just as I was opening the front door, the telephone rang.
我正开前门的时候,电话铃响了。
Just as I was leaving the house, you came in.
你进来的时候我正要出门。
when也能够引导比较短暂的动作,while和as则一般不行:
We were having supper when the lights went out.
我们正在吃晚饭时灯灭了。
2)过去实行时往往与表示一段时间的状语连用,如all morning, all night, all day, all evening, the whole week等,表示这段时间一直在干什么:
They were preparing for the party for two whole days.
整整两天他们一直在为晚会实行准备。
2.短语动词中的小品词(The particles)
在上一课的语法中已经提到,很多动词加上介词或副词后就会改变词义。
这些介词和副词通常被称为小品词。
它们没有词形变化。
有些小品词既能够作介词又能够作副词。
判断一个小品词是副词还是介词要看小品词有没有带宾语。
有宾语的是介词,没有宾语的是副词。
介词的位置相对固定些:
I am looking for Tim.
我在找蒂姆。
(for为介词,位置不能变动)
She looked after the baby.
她照顾那孩子。
(after为介词)
He put the fire/ it out.
他灭了火。
(out为副词)
Mother woke the children/ them up.
母亲把孩子们叫醒了。
(up为副词)
She took the picture/ it down.
她把画取了下来。
(down为副词)
Please turn the radio/ it off.
请把收音机关掉。
(off为副词)
He turned it on.
约翰打开了电视。
(on为副词)
Put the cake on the table.把蛋糕放在桌上。
(on为介词) She is walking up the hill.她正向山上走去。
(up为介词)。