具体地说明几个在使用代词时应注意的问题 （1）指代必须准确无误 我们知道代词是用来指代人或事物的词，那么如果在使用代词时指代不清楚，就会引起他人的误解、费解、甚至不理解.例如： While carrying the paint can from the garage to the house, Marry was afr aid that some of it might spill on her new skirt. 当玛莉从车库把油漆罐搬到屋里时，她担心油漆会溅到她的新裙子上。 （2）关于人称代词、反身代词、物主代词在使用这三类代词时，我们要注意它们在句中的人称、单复数、及性和格的一致性。 （3）物主代词 形容词性物主代词只能作定语，例： My brother often does his homework in his room. 我的弟弟常在他房间里做作业。 The newly-built house is our laboratory. 那幢新建的房子是我们的实验室。 Anything has its character individually. 任何事物都有其各自的特征。名词性物主代词则可以在句中充当主语、宾语、表语。它的意义= 形容词性物 主代词+名词；或者说它相当于名词。例： His dictionary is English-Chinese, but mine is English-English. 他的词典是英汉的，我的是全英的。 We each bought a new book. Yours is about management and mine is about the American history. 我们一人买了一本书。你的是关于管理的，我的是关于美国历史的。 新概念英语视频下载 新概念英语视频教学 新概念英语培训怎么样
其它 （1） one…the other 与some…others ; 这是两组常一起连用的代词短语，指两者之间；前者用于单数，后者用于复数。如： She has two children. One is a boy; the other is a girl. 她有两个孩子：一个男孩，一个女孩。 They have different ideas about how to spend their weekend. Some think that it is good to have a party. Others prefer to have an outing. 他们对怎么过周末想法不同，有些认为以聚会为好，其他人却要去郊游。 另外, another一词泛指"另一个；又一个"，不限制于两者之间。例如： I think that it is impossible for me to visit another city this time. 我看我这次是不可能再去观光别的地方了。 He is another friend of mine who I got to know in New Zealand. 他是我在新西兰结识另一个朋友。 （2）no与none , 这两个词都表示否定意义：no = not any 意在强调"连一个、一点都不"，它只能作形容词，一般与名词连用；而none则相当于名词，可独立在句中充当成分，也可与介词短语连用--表示在某一范围内"任何一个也不"。 （3）关于合成不定代词 常用的合成不定代词有以下几组： something某物,某事somebody某人someone 某人; anything任何事物anybody任何人anyone任何人； everything一切事/物everybody每个人everyone每个人； nothing无事、无物no one没有人nobody无人 使用合成不定代词时应注意下面几点： ①当它们用作主语时应看作单数。 ②它们只能作名词，不能看作形容词而充当定语。 ③如果它们带有修饰语，修饰语只能放在它们的后面。 Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’ s manufacturer, recommends 2.5 centimeters. If health issues arise from cell phone use, the possible effects are huge. Voice calls—Americans chat on cell phones 2. 26 trillion(万亿)minutes annually—earn $109 billion for the wireless carriers. Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect. ”The book surveys scientific research and concludes the question is not settled. Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population. “Most cancers have multiple causes, ”she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer. Children are more vulnerable(易受伤的)to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid(易吸收的液体). No studies have yet been completed on cell phone radiation and children, she says. Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains. Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen(腹部). 1. According to Ms. Davis, brain cancer increases . A. among children B. among old people C. in the twentiesD. among pregnant women 2. Why do children easily be affected by radiation? A. Because they haven’t grown up. B. Because they are too young to protect themselves. C. Because they use cell phones more often than adults. D. Because their skulls are thinner and their brains are easily hurt. 3. What can we conclude from the last paragraph? A. Pregnant women should keep cell phones away. B. People should use cell phones in the correct way. C. If you are a child, you’d better text rather than make phone calls. D. When you use a cell phone, use a wired headset or the phone’s speaker. 4. What does the passage mainly talk about? A. Be careful when using cell phones. B. Don’t hold your cell phone against your ear. C. Rats exposed to radiation have damaged DNA in their brains. D. Low-energy radiation could damage cells that could lead to cancer.
