1、#160;at a disadvantage 处于不利地位47.at a loss 不知所措48.at a time 每次，一次49.at all 丝毫，根本50.at any moment 随时51.at first 首先，最初52.at large 未被捕获的，自由行动的，详尽的53.at last 终于，最终54.at least 至少55.at length 最终，详细地56.at most 最多57.at no time 从不，决不58.at one time 曾经59.at the cost of 以为代价60.at the least 至少，无论如何61.at times 有时，
2、间或62.atspeed 以的速度63.attend on 照顾，侍候64.attributeto. 把归于.65.back up 后退，支持66.be based on 基于67.be able to 能够68.be about to 正打算69.be accustomed to 习惯于70.be associated with 与有关71.be aware of 意识到72.be capable of 有能力做.73.be caught 遇到，陷入74.be committed to 被交给，答应承担义务75.be confined to 限制在，局限于76.be confined/be
3、restricted 受限制77.be dedicated to 奉献，献给78.be devoted to 献身于/致力于.79.be directed to 指向，针对80.be drawn to 被.所吸引81.be due to 由于82.be exposed to 暴露在.下，接触.83.be fond of 喜爱84.be full of 充满85.be habitual to(him) 对(他来说)习以为常86.be in order 合适，恰当87.be involved in 参与，参加88.be involved with 涉及，与有关连89.be left to 由.来决
4、定，由.来想办法90.be limited to 限制在.，限定在.91.be linked to/with 与连接/有联系92.be proud of 为.而骄傲93.be referred to 被提及94.be related to 与有关95.be sick of 厌恶/讨厌.96.be subject to 经受，遭受97.be suitable for 适合于98.be sure of 对.肯定99.be thrown in 额外赠送100.be tied by/with 被捆绑101.be tied to 束缚于，捆绑于102.be tired of 厌倦/厌烦.103.behi
5、nd time 晚点104.belief in 对的真实性或正确性具有的信心105.believeto be. 相信是.106.better than 好于107.beyond question 毋庸置疑108.break away 脱离，逃跑109.break down 损坏，分解，瓦解110.break into 闯入111.break in 闯入，打断112.break off 断绝，结束113.break out 突发，爆发114.break through 突破115.break up 结束,打碎116.bring about 引起，带来117.bring forward 提出118
6、.bring out 使出现，公布，出版119.bring up 提出，养育，呕吐120.by accident 偶然121.by all means 无论如何122.by chance 偶然，意外地123.by choice 通过选择124.by contrast 对比之下125.by means of 用，依靠，借助于126.by means of 借助于127.by mistake 错误地128.by the way 顺便提一下129.by virtue of 凭借，由于130.by way of 经由，通过方式131.call forth 唤起132.call for 邀请，要求，需要
7、133.call off 取消134.call on/upon 访问，拜访135.care for 照顾，关心，喜欢136.carry out 贯彻，执行137.cast light on sth. 阐明某事138.catch up with 赶上139.catch sight of 看见140.center on 集中在，以.为中心141.characterized by 以.为特征142.coincide with 与相符e from 来自，来源于e off 成功，脱离e on 快点，上演，突然产生e out 出版，出现，结果是e to 等于，结果是，总计，达到e under attack
8、 受到打击e under 归入，受到e up 走近，上升，发芽，被提出ment on 评论，发表意见mit to 交付，把投入ply with 遵守，服从154.conform to 遵守，符合，顺应155.consist of 由.组成156.consistent in 在(某方面)一致157.consistent with 与一致158.contribute to 有助于，促进159.copy out 抄写160.correlate with 使.与.产生相互关系161.count on 指望162.cut away 砍掉163.cut down 削减164.cut off 切断，中断16
9、5.cut out 删掉166.dedicateto. 奉献167.depend on 依靠，依赖，取决于168.die back 枯死169.die down 逐渐消失，止息170.die off 相继死去171.die out 消失，死绝172.difference in 在方面的差别173.do something for/to 改进，增强174.doubt about 怀疑175.due to 由于,因为176.dwell on 详述，细想177.enter for 报名参加178.enter into 开始(谈话,讨论)179.entertain a proposal 愿意考虑这一建
10、议180.entertain an idea 抱着一种想法181.even if 即使，虽然182.even though 即使，虽然183.ever since 此后一直184.faithful to 忠心于185.fall from 从落下186.far from 毫不，远非187.favor of 喜欢188.figure out 计算出，解决，理解18a时亮 VaViVb时亮 139 139 14R1 R2 R3 DP DP Vi V+ V+ 4687 s=2-1/Q 低通滤波器 OP02E 162162 13s*13 1414 in out 4688 0.1Hz-10Hz带通滤波器
11、AD642AD642 22532253 115 225 15 1515 54 out in V+ V- 1 2 3 4 5 6 7 8 4689 CMOS低电平工作开关 4069 182 81 391 24V 18A 2N4403 2N6282 +15V+24V in 4690 CMOS高电平工作开关 4069 182 39124V 18A +24V in 2N4401 2N6263 151 4691 +15V CMOS交流电源控制 TR DP 13 561 1314 123 4011 220V 4692 +15V CMOS直流电源控制 4011 2N5060 14V80mA 223 393
12、4693 MPSA65 CMOS直流电源控制 +15V 401114V80mA 223 393 4694 -15V CMOS交流电源控制 4011 TR 13182 14 333 220V 4695 4N31 控 制 信 号 +Vcc 交流控制接口 52 35 13 RS 10A K 5A DQ 24 14 220V 4696 CMOS直流电源控制 +15V 4011 14V80mA 223 393MPSA13 4697 CMOS交流电源控制 -15V 4011 TR 13 182 14 333 220V 4698 煤气泄漏自动排气报警器 9V 2A 471 1.I3.O 2.G 7806 1
13、2.3 4 5 8778 HFC9301 3V 220V FSMQK2A Y J JK K 13511 34 2W 12 12 11 13 4699 能记住被盗时间的防盗报警器 2.6 37 4.81 5 555 DR 15223 石 英 钟 防盗线 12V Y 13 15 392 14 J JB JK AK 12 12 11 G12 4700 高中英语语法解析 在句子中起名词作用的句子叫名词性从句(Noun Clauses）。 名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语
14、从句和同位语从句。一 主语从句主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。1. It 作形式主语和it引导强调句的比较It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人时也可用who/whom。例如： a) It is a pity that you didnt go to see the film. 你不去看那场电影真可惜。 b) It doesnt interest me whether you suc
15、ceed or not.我对你成功与否不感兴趣。 c) It is in the morning that the murder took place.谋杀案是在早上发生的。（强调句型） d) It is John that broke the window.是John打碎的窗户。（强调句型）2. 用it 作形式主语的结构(1) It is 名词 从句 It is a fact that 事实是 It is an honor that 非常荣幸 It is common knowledge that 是常识(2) It is 形容词 从句 It is natural that 很自然 It i
16、s strange that 奇怪的是(3) It is 不及物动词 从句 It seems that 似乎 It happened that 碰巧 It appears that 似乎(4) It 过去分词 从句 It is reported that 据报道 It has been proved that 已证实 It is said that 据说3. 主语从句不可位于句首的五种情况：（1）if 引导的主语从句不可居于复合句句首。（2）It is said /reported结构中的主语从句不可提前。例如： 正确表达：It is said that President Jiang wil
17、l visit our school next week. 错误表达：That President Jiang will visit our school next week is said. （3）It happens/occurs结构中的主语从句不可提前。例如： 正确表达：It occurred to him that he failed in the examination. 错误表达：That he failed in the examination occurred to him. （4）It doesnt matter how/whether 结构中的主语从句不可提前。例如： 正确
18、表达：It doesnt matter whether he is wrong or not. 错误表达：Whether he is wrong or not doesnt matter. （5）含主语从句的复合句是疑问句时，主语从句不可提前。例如： 正确表达：Is it likely that it will rain in the evening? 错误表达：Is that will rain in the evening likely?4. what 与that 在引导主语从句时的区别 what 引导主语从句时在句时在从句中充当句子成分，如主语宾语表语，而that 则不然。例如： a)
19、What you said yesterday is right. b) That she is still alive is a consolation 二宾语从句宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词 (及物动词) 或介词之后。1. 作动词的宾语 (1) 由that引导的宾语从句(that 通常可以省略), 例如： I heard that be joined the army. 我听说他参军了。 (2) 由what, whether (if) 引导的宾语从句，例如： a) She did not know what had happened.她不知道发生了什么。
20、b) I wonder whether you can change this note for me.我想知道你是否 能帮我改一下笔记。 (3) 动词间接宾语宾语从句。例如： She told me that she would accept my invitation.她对我说她会接受我的 邀请。2. 作介词的宾语 Our success depends upon how well we can cooperate with one another.我们的成功取决于我们之间的合作。3. 作形容词的宾语 I am afraid (that) Ive made a mistake.我恐怕我已经
21、犯了一个错误。注意：that 引导的从句常跟在下列形容词后作宾语：anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content 等。也可以将此类词后的that 从句的看作原因状语从句。4. it 可以作为形式宾语 it 不仅可以作为形式主语，还可以作为形式宾语而真正的宾语that 从句则放在句尾，特别是在带复合
22、宾语的句子中。 例如： We heard it that she would get married next month. 我听说她下个朋就会结婚了。5. 后边不能直接跟that 从句的动词 这类动词有allow, refuse, let, like, cause, force, admire, condemn, celebrate, dislike, love, help, take, forgive等。这类词后可以用不定式或动名词作宾语，但不可以用that引导的宾语从句。如： 正确表达：I admire their winning the match. 错误表达：I admire tha
23、t they won the match.6. 不可用that从句作直接宾语的动词 有些动词不可用于“动词间接宾语that从句“结构中，常见的有envy, order, accuse, refuse, impress, forgive, blame, denounce, advise, congratulate等。例如： 正确表达：He impressed the manager as an honest man. 错误表达：He impressed the manager that he was an honest man.7. 否定的转移 若主句谓语动词为think, consider,
24、suppose, believe, expect, fancy, guess, imagine等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓语用肯定式。例如： I dont think this dress fits you well. 我认为这件衣服不适合你穿。三. 表语从句表语从句在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语连系动词表语从句”。可以接表语从句的连系动词有be, look, remain, seem等。引导表语从句的that常可省略。另外，常用的还有the reason is that 和It is because 等结构。例如：1
25、) The question is whether we can make good preparation in such a short time.2) This is why we cant get the support of the people.3) But the fact remains that we are behind the other classes.4) The reason he is late for school is that he missed the early bus.四. 同位语从句同位语从句就是在复合句中作名词的同位语的名词性从句。1. 同位语从句
26、的功能 同位语从句对于名词进一步解释，说明名词的具体内容，一般由that引导，例如： 1) The kings decision that the prisoner would be set free surprised all the people. 2) The order that all the soldiers should stay still is given by the general.2. 同位语在句子中的位置 同位语从句有时可以不紧跟在它所说明的名词后面，而是被别的词隔开。例如： He got the news from Mary that the sports meet
27、ing was put off.3. 同位语从句与定语从句的区别(1) 定语从句中的that既代替先行词，同时以在从句中作某个成分（主语或宾语），而同位语从句中的that是连词，只起连接主句与从句的作用，不充当句中任何成分。(2) 定语从句是形容词性的，其功能是修饰先行词，对先行词加以限定，描述定的性质或特征；同位语从句是名词性的，其功能是对名词进行补充说明。例如：1) The news that he told me is that Tom would go abroad next year.（他告诉我的消息是汤姆明年将出国。）（第一个that引导的从句是定语从句，that在从句中作宾语）2
28、)The news that Tom would go abroad is told by him.（汤姆将出国的消息是他讲的。）（同位语从句，that在句中不作任何成分） 第二章 “It”用法及其句型和固定搭配讲解It 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下：一、It用作实词表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象 二、It用作形式主语 替代作主语的从句、动词不定式、动
29、名词，而把真正作主语的从句、动词不定式、动名词置于句尾。 It 作形式主语的常见句型： 1. 代作主语的动词不定式，其句型为 (1) It be adj. (for sb.) to do sth. 此处adj. 通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impo
30、lite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous 例 It is illegal (for a teenager) to drive a car without a license. (2) It be adj. of sb. to do sth. 此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, fool
31、ish, stupid, clever, wise, crazy. 例 Its kind of you to help me with the problem. (3) It替代作主语的动名词的常见句型 Its no good/use doing Its (well)worth doing Its (well)worth ones while doing/to do Its (well)worth while doing/ to do 例 Its no use crying over spilt milk. 2. It替代作主语的从句常见句型 (1) It is + noun +从句 例 It
32、 is no secret that the president wants to have a second term at office. (2) It is adj. +clause Its surprising that (should)竟然 Its a pity/shame that(should)竟然 例 Its important that you should apologize to her for your rudeness.(=Its of much importance that you should apologize to her for your rudeness.) (3) It verb sb. + clause= It is v-ing + clause It+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze /bother/concern/frighten/please/anger sb
