四英语讲课稿（精选7篇）
篇1：四英语讲课稿
As the development of the media, people are affected by the TV and commercial ads, they keep their eyes on the amusement all the time, so they will become a fan. Especially for the teenagers, they chase for the idols. Idols bring the great effect on the public, their power is huge.
由于多媒体的发展，人们受到了电视和商业广告的影响，他们总是在关注着娱乐，所以他们会成为娱乐的粉丝。特别是青少年，他们追逐偶像。偶像给大众带来了很大的影响，他们的力量是很大的。
Today, weibo is very popular for people to share the information. The celebrities open their accounts and they record their lives on it. Many fans will keep their eyes on their idols’ accounts, they want to know everything about their idols. When the celebrities post the news about helping the poor people, then the fans will try their best to help the poor people. The fans will follow their idols’ words.
今天，微博对于人们来说很流行，他们使用微博来分享信息。名人开了账号来记录生活点滴。很多粉丝会观察偶像们的账号，想要了解有关偶像的一切。当名人们张贴了有关帮助穷人的消息时，粉丝会尽最大的努力去帮助穷人。粉丝们会追随着偶像的话语。
As the power from idol is so effective, so the idol should keep the positive image to the public.
由于偶像的力量是如此的有效，因此偶像应该在大众面前保持积极的形象。
The idols have the responsibility to keep the positive image, so that their power can be used in the proper way.
偶像有责任保持积极的形象，这样他们的力量才能用在适当的方面。
篇2：四英语讲课稿
Write on ANSWER SHEET THREE a note of about 50-60 words based on the following situation:
You have heard that your friend, Jim, wishes to sell his hike. Write him a note expressing your interest in it, asking him about its condition and offering a price for it.
Marks will be awarded for content, organization, grammar and appropriateness.
篇3：英语语法专题训练前的讲课稿
学生们刚接触英语时, 教师不是进行语法的讲授, 而是进行词汇和简单句子的操练。虽然问题以语境语用为指导, 但英语词汇类别及英语句子基本结构还是要进行专门讲解。我觉得大家在实践阶段务必要掌握语法体系的一半, 那就是“词法”这一块。词的词性就是一个词的基本用法, 所以学生们要明确知道十大词类及各词类的基本构句功能。如:名词的定义、分类和在句中作主语、宾语及介词的宾语等。遇到特殊句型, 再接着讲作主补、宾补等。语法研习多一点, 答题困难就少一点, 这一点是不用争议的。
在词法学习的递进阶段, 学习各词类在句中能作的成分是必不可少的。语言专业和法律专业最烦的就是“形式”, 而恰好注重“形式”也就是掌握好这两个专业的根本所在。英语句子的基本结构是英语句法学习的重要内容, 如果学生们心里拒绝接受教师对这些内容的讲解, 是无法学好英语的。英语句子要写得正确, 就得套用这样的结构形式。高考题中有个典型的语法考点———强调句型, 命题者可以从一般疑问句、特殊疑问句以及被强调再带一个定语从句几个方面进行考查, 但唯一不变的, 也就是一个“形式”, 类似于主系表结构, 后补一个定语从句结构。这恰恰又是一个要求学生区别的语法点。这么讲的目的只有一个———说明英语简单句型学习的重要性。
相比之下, 在掌握了简单句之后, 掌握并列句的构成就较为容易了。但对几个并列连词, 如for, when, while等却不能掉以轻心, 因为大家很容易混淆它们, 主要是由于for还有介词的词性, 而when和while经常所见为从属连词的用法。
复合句是英语语法学习中很有特色的一块。我对它的理解是这样的:一个成分非常复杂的句子中, 无非还是六个成分———“主谓宾定状补”, 在这六个成分中, 根据词法, 一般会由名词作主语及宾语, 形容词作定语, 副词作状语。而当用句子来充当这三个成分时, 我们就会把它称作名词性从句 (即主语、宾语、表语和同位语从句) 、形容词性从句 (即定语从句) 和副词性从句 (即状语从句) 。谓语主要由动词的各种形式构成, 谓语只叫做“谓语”是不能体现它的完整性的, 应该叫做谓语部分, 原因是谓语不完全是指谓语动词的事儿。这点我们会在词法和句法复习中再谈。而补语成分则由能作表语的词来充当。谓语和补语这两个成分不产生从句概念。一个句子, 不管它带有几个从句, 我们能从中找到它的基本结构 (即一个简单句) , 就能理解整句话的主要脉络。这是很简单的, 难的在于引导各种从句的从属连词是什么。由于连词既起连接主句和从句的作用, 表明主从句之间的关系, 还在从句中充当一定的成分, 有一定的意义, 故复合句中的连词常成为考查的焦点。举例:
When asked what they want most from life and what they want most for their children, people answer that what they want most is only happiness.当问及人们在生活中最希望得到什么, 最希望他们的孩子得到什么的时候, 人们回答是“快乐”。
这里when asked...=when people was asked...直接用从属连词+分词作状语, 一般被认为是状语从句的省略。而what they want most from life and what they want most for their children此句是ask这个词的直接宾语, 因此叫做“由what引导的宾语从句”。换成主动形式即:When you ask people what they want most from life and what they want most for their children...主句部分people answer that what they want most is only happiness中, that引导了又一个宾语从句, 而宾语从句中what they want most在从句中又做主语, 整个宾语从句是个主系表结构。
学习了句法中三种层面 (简单句—并列句—复合句) 的结构后, 对英语语言最精炼的结构就理解了。精炼是语言表达的最高境界, 所以用词少而能表达清楚, 就不必说得“冗长”了。我认为高中英语语法教学的大任务是把已学的“从句”用法, “精简”到非谓语形式的表达。
英语语法学习的流程就是“由词到句”, “句到主从句”, “主从句到句+非谓语形式”。非谓语形式在精简的句子中主要作形容词、副词和名词。三类从句都可省略成非谓语形式。
篇4：电源内部模型的探究（讲课稿）
1.第二节《电动势》是新教材新增加的一节，教材把电源类比成抽水机；把抽水机在抽水的过程中克服重力做功类比成电源内部“非静电力”克服“静电力”做功；把抽水机抽水所增加的水的重力势能类比成电源内部的“非静电力”做功所增加的电势能。新教材强调了电动势和电压的区别；强调了电动势是反映“非静电力”做功的本领；强调了“非静电力”是在克服“静电力”做功。插图2.2-1很形象的描述了电源内部存在着由正极指向负极的电场，在这个电场中，正电荷所受的静电力阻碍它继续向正极移动。因此，在电源内要将正电荷从负极搬运到正极必须要有“非静电力”。
从能量角度来看，电源是通过非静电力做功把其他形式的能转化为电势能的装置。
而且在平时的练习中有很多关于这方面的题目，例如：
关于电动势，下列说法正确的是：
A.在电源内部把正电荷从负极移到正极，非静电力做功，电能增加
B.对于给定的电源，移动正电荷，非静电力做功越多，电动势就越大
C.电动势越大，说明非静电力在电源内部从负极向正极移送单位电荷量做功越多
D.电动势越大，说明非静电力在电源内部把正电荷从负极移送到正极的电荷量越多
2.本章第七节“闭合电路的欧姆定律”是新、旧教材都有的内容，但人教版新教材在教材编写上较旧版完全不同：去掉了原来的插图，取代为插图2.7-2。
新教材把闭合电路分成两部分，即外电路和内电路。但在能量转化上却分为三部分：外电路、内电路、BC与DA反应层。新教材从能量角度，推导出了闭合电路的欧姆定律。
课本在讲能量转化时说道“内电路与外电路一样，也存在着恒定电场，正电荷也是在静电力作用下移动的。”这句话让很多学生理解为内电场对电荷做正功。好像与前面第二节所讲互相矛盾，到底应该是怎么回事呢？
3.通过翻阅赵凯华、陈熙谋编《电磁学》第二版，林海兵《电源论》，结合平时对原电池的使用和理解，我感觉第二节课本的讲解有些太仓促，让学生产生错误的概念模型。为了更好地让学生理解，我觉得应该这样建立模型（如右图所示）：
外电路电场方向从正极指向负极而且对电荷做正功。内电路中在静电力作用下电势发生两次跃迁，分别在正、负极板附近，在跃迁过程中非静电力做正功转化成电势能。B处跃迁使得在电源内部C处形成由B指向A的电场，并在电场力作用下使得电荷运动，电荷电势能减少，只是该部分电势能减少量转化成内电阻产生的热。A处跃迁使得外电场由正极指向负极，并使得电荷运动中，电势能转化成外电路消耗的能量。
在用原电池进行实验时，电压表的正极接在负极附近也说明在电源内部也就是C中B侧为高电势，进一步证明了C中静电场由负极指向正极，电荷运动时，静电场做正功。
4.综上所述，以前在做题过程中所讲的在电源内部非静电力做功，使电荷克服电场力运动并转化为电势能的说法值得商榷，那只是一个笼统的说法。在读林海兵《电源论》时，感觉描述较为准确，电源内部由于极化，情况比较复杂。为了让学生更直观轻松的了解电源内部，我觉得上述模型更简洁些。建议课本在修改时可选用更好地模型和解释，使得第二节的说法应该更准确、详细！
作者简介：邹建光，男，1962年11月出生，本科，就职于山东省淄博市教研室，研究方向：中学物理教学。
马文吉，男，1980年10月出生，本科，就职于山东淄博桓台一中，研究方向：高中物理教学。
篇5：专四英语作文
birds says:”he’s got wifi’
By depicting this the image,the drawer attempts to expose the popularity of wifi nowadays.But every coin has two sides,so does wifi.On the one hand,it makes it possible for a wireless-enabled computer or personal digital assistant to connect to the Internet almost time,anywhere,making our life more convenient and interesting And with the development of society,free wifi will be available in may more places,which will make it cheaper for us to surf the internet.On the other hand,access points could be used to steal personal information transmitted form wifi users and there is still room for improvement in the signal strength of wifi.
Generally speaking,only when we make the most of the advantages of wifi and get rid of its.
篇6：专四英语作文
The last several decades have seen a decline in parental influence on their children. In fact, it seems that the more children watch movies and television and get influenced by people outside the home, the more their parents lose control over them. Nowadays, children and teens are often searching for role models other than their parents to imitate. They naturally look to celebrities like singers, movie stars, and athletes to be their guides. For example, many high school students like to dress in the latest fashions that have been made popular by various celebrities. They even cut their hair like famous people or say the same things as them. Parents simply cannot complete with these stars when it comes to influencing their children. Many television shows, movies, and video games have high levels of violent content and bad language, which greatly influence young people watching them. Children have begun acting badly based upon what they have seen on various media.
近几十年来，父母对子女的影响出现了下降。事实上，越来越多的孩子看电影和电视，并受到外界的影响，他们的父母对他们失去控制。如今，孩子和青少年往往是在寻找榜样，而不是他们的父母模仿。他们很自然地去看像歌手，电影明星，运动员是他们的指南。例如，许多高中学生喜欢穿最新的时装，这是由各种名人所欢迎的。他们甚至把自己的头发剪了，像名人一样，或者说同样的事情。父母只是不能完成这些星星，当它影响他们的孩子。许多电视节目、电影和电视游戏都有很高水平的暴力内容和不好的语言，这些都严重影响了年轻人的观看。孩子们已经开始根据他们在各种媒体上看到的东西开始表演了。
篇7：专四英语作文
A Major Advantage/Disadvantage of the Information Age
As everyone knows, the information age has brought us countless benefits, but when it comes to its major advantage, people may hold different views. As for me, the major advantage of the Information Age is that it makes it easy for individuals to have instant access to all kinds of information. In the past, for instance, if a student was meant to compose a thesis, he was supposed to bury himself in piles of books in the library, and probably after several days’ or even several months’ searching, he still could not find the materials he wanted. But now it is a totally different story. The advanced techniques of the information age have spared us all those troubles. What we need to do is just sit in front of the computer and search for our target information on the Internet rather than struggle painfully in numerous books. More excitingly, we don’t have to waste several days or even months waiting. Usually the information we need will be transferred to us in seconds. The information age can not only bring convenience to students in searching of materials, but also help people in all walks of life, save their energy and enhance their efficiency. Now since we’re in an economy based around the manipulation of information, I have every reason to believe that this advantage of the information age will play an even greater role in the future.