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1、精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢1 英语动词不规则变化表 记忆法一:常见 93 个不规则动词的变化规律归纳如下 一、A A A 型,即原形、过去式和过去分词三者都相同。(共 9 个)cost cost cost cut cut cut hit hit hit hurt hurt hurt let let let put put put read read read set set set shut shut shut 二、A B B 型,即过去式、过去分词相同。(共 41 个)1.过去式和过去分词都含有-ought。(3 个)bring brought b
2、rought buy bought bought think thought thought 2.词尾有-ild,-end 时,只需把 d 变为 t。(4 个)build built built lend lent lent send sent sent spend spent spent 3.过去式、过去分词都含有-aught。(2 个)catch caught caught teach taught taught 4 把-eep 变为-ept。(3 个)keep kept kept sleep slept slept 精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢2
3、 sweep swept swept 5 把-ell 变为-old。(2 个)tell told told sell sold sold 6 过去式、过去分词都含有-elt 或-ilt。(4 个)smell smelt smelt spell spelt spelt feel felt felt spill spilt spilt 7 过去式、过去分词都在原形词尾加 t。(3 个)learn learnt learnt mean meant meant spoil spoilt spoilt 8 过去式、过去分词词尾是 d。(4 个)say said said pay paid paid la
4、y laid laid hear heard heard 9 改变元音字母。(11 个)meet met met get got got sit sat sat find found found 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢3 hold held
5、held spit spat spat shine shone shone win won won hang hung hung dig dug dug lose lost lost 10 改变辅音字母。(1 个)make made made 11 改变元、辅音字母。(4 个)leave left left stand stood stood have(has)had had understand understood understood 三、A B C 型,即原形、过去式、过去分词都不相同。(共 35 个)1.i a u 变化。(6 个)begin began begun drink dr
6、ank drunk sing sang sung ring rang rung swim swam swum sink sank sunk 2 词尾为-ow,-aw 时,过去式将其变为-ew,过去分词在其原形后加 n。(5 个)去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删
7、除 谢谢4 blow blew blown draw drew drawn grow grew grown know knew known throw threw thrown(show 除外)3 词尾为“i辅(1 个)e”,过去式将 i 变为 o,过去分词多在原形后加 n,若那个辅音字母为 d 或 t,须双写 d 或 t 后加 n。(4 个)(give,hide 除外)drive drove driven write wrote written ride rode ridden rise rose risen 4 过去分词在过去式后加(e)n。(5 个)break broke broken
8、choose chose chosen freeze froze frozen speak spoke spoken wake woke woken 5 过去分词由过去式加-ten 构成。(1 个)forget forgot forgotten 6 过去分词由原形加(e)n 构成。(6 个)be was(were)been eat ate eaten fall fell fallen give gave given see saw seen hide hid hidden(hid)去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权
9、请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢5 7 词尾为-ake 时,过去式将其变为-ook,过去分词在原形词后加-n。(2 个)take took taken mistake mistook mistaken 8 原形、过去式和过去分词都不相同。(6 个)do did done fly flew flown go went gone lie lay lain show s
10、howed shown wear wore worn 四、A A B 型,即过去式和原形相同。(1 个)beat beat beaten 五、A B A 型,即过去分词和原形相同。(3 个)come came come become became become run ran run 六、情态动词型,只有原形和过去式,没有过去分词。(4 个)can could may might will would shall should 记忆法二:一、原形、过去式、过去分词相同:去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删
11、除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢6 cost cut hit hurt let put read shut(细心的你一定会发现,这些词中大多数是以字母 t 结尾的。)二、原形、过去式相同,过去分词不同:beat beat beaten 三、原形、过去分词相同,过去式不同:come came come become became become run ran run(come,
12、become,属不规则变化,但 welcome 属规则动词,其过去式、过去分词为:welcomed,welcomed)四、过去式,过去分词相同:(1)去掉字母组合 ee 中的一个 e meet met met feed fed fed(2)去掉字母组合 ee 中的一个 e,然后再在词尾加 t feel felt felt sleep slept slept keep kept kept sweep swept swept(3)词尾为的 ll 去掉一个 l 加 t spell spelt spelt smell smelt smelt spill spilt spilt(4)过去式和过去分词以
13、aught 或 ought 结尾 catch caught caught teach taught taught bring brought brought buy bought bought think thought thought(5)将 stand 改为 stood stand stood stood understand understood understood 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文
14、档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢7(6)将 ay 改为 aid lay laid laid pay paid paid say said said(7)将 d 改为 t lend lent lent send sent sent spend spent spent build built built(8)将 i 改为 a,o,u 等 sit sat sat spit spat spat dig dug dug win won won(9)将 ell 改为 old tel
15、l told told sell sold sold(10)词尾加 t learn learnt learnt mean meant meant dream dreamt dreamt spoil spoilt spoilt(11)有 两种过去式和过去分词,一种是不规则的,一种是规则的:learn learnt learnt learn learned learned shine shone shone shine shined shined hang hung hung hang hanged hanged smell smelt smelt smell smelled smelled bu
16、rn/burnt/burnt burn/burned/burned light/lii/lit light/lighted/lighted(12)其它 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢8 have(has)had had hear heard hear
17、d shoot shot shot lose lost lost hold held held get got got(AmE gotten)find found found make made made leave left left 五、三者均不同:(1)过去式以 ew 结尾、过去分词以 own 结尾 blow blew blown fly flew flown grow grew grown know knew known throw threw thrown 值得注意的是:show showed shown 或 showed draw drew drawn(2)改 i 为 a 变成过去
18、式、改 i 为 u 变成过去分词 begin began begun drink drank drunk ring rang rung sing sang sung swim swam swum sink sank sunk(3)改 i 为 o 变成过去式,过去分词以 n 结尾 drive drove driven write wrote written rise rose risen ride rode ridden(4)原形后加 n 变成过去分词 drive drove driven rise rose risen eat ate eaten give gave given fall fe
19、ll fallen 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢9(5)过去式后加 n 变成过去分词 break broke broken choose chose chosen freeze froze frozen mistake mistook mistak
20、en steal stole stolen speak spoke spoken take took taken wake woke woken(或 woke)(6)其它 be was 或 were been do did done forget forgot forgotten go went gone hide hid hidden see saw seen wear wore worn 六、有两种过去式和过去分词,但词义相同。wake woke woken(或 woke)wake waked waked sink sank sunk sink sunk sunken 七、动词因其过去式、
21、过去分词有两种形式而产生不同词义:shine、hang 的两种过去式和过去分词:shone shone 照耀 shined shined 擦亮 hung hung 悬挂 hanged hanged 绞死 八、两个既可以做过去式,又可以做动词原形的词 lie 躺卧 lay lain lying(现在分词)lay 放,下蛋 laid laid laying find 找到、发现 find found found 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型
22、即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢10 found 创建,成立 found founded founded 九、根据动词之间的词义联系来记忆(一)词义相对:(1)come came come 来 go went gone 去(2)give gave given 给 get got got(AmE gotten)获得(3)sleep slept slept 睡觉 wake woke woken(或 woke)或 wake waked wak
23、ed 醒来(4)rise rose risen 上升、上涨、升起 fall fell fallen下降、落下、倒下 sink sank sunk sink sunk sunken 沉下,(使)下沉(5)buy bought bought 买 sell sold sold 出售,卖(6)take took taken 带去 bring brought brought 带来(7)teach taught taught 教 learn learnt learnt 或 learn learned learned 学习、学会(8)lose lost lost 丢失、失败 find found found
24、 找到 win won won 赢得、(获)胜(9)stand stood stood 站、立 sit sat sat 坐(10)send sent sent 送、寄、发送 get got got 获得、收到(二)词义相近:(1)beat beat beaten 打,打败 win won won 赢得、获胜(2)understand understood understood 懂,了解 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除
25、谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢11 know knew known 知道,了解,认识(3)get got got(AmE gotten)变成、成为、变得 become became become 变成,成为,变得 go went gone 变成 turn turned turned 变成(4)spend spent spent 花费、度过 pay paid paid 支付、交纳 cost cost cost 花费、价值为 take took taken 花
26、费(5)say said said 说、讲 speak spoke spoken 说、演讲 tell told told 告诉、说、吩咐、断定 talk talked talked 谈话,讲,谈论,议论 记忆法三:1无变化,过去式与原形相同。let let,put put,hit hit,must must,set set,beat beat,cast cast,cost cost,cut cut,hurt hurt,read red,shut shut(shed shed split split spread spread burst burst)2元音字母的变化。ia:begin bega
27、n,drink drank,ring rang,sing sang,swim swam,give gave,sit sat,sink sank io:drive drove,ride rode,shine shone,write wrote,rise rose,win won,去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,
28、推荐学习交流 仅供学习与交流,如有侵权请联系网站删除 谢谢12(strive strove arise arose)iou:find found(wind wound,bind bound,grind ground)aoo:take took,shake shook eo:get got,forget forgot oa:come came,become became ooo:shoot shot,choose chose 3元音字母组合的变化。aw/ow/yew:draw drew,blow blew,grow grew,know knew,throw threw,fly flew 4元音字
29、母和辅音字母都有变化。(1)sell sold,tell told,retell retold(2)say said,pay paid,lay laid,relay relaid(3)sweep swept,keep kept,sleep slept,creep crept(4)bring brought,buy bought,think thought,fight fought(5)catch caught,teach taught(6)can could,will would,shall should 5辅音字母变化。(1)build built,send sent,bend bent,l
30、end lent,rend rent,spend spent(2)make made,have had,hear heard(3)mean meant,learn learnt 单片机原理及应用习题 第一章 绪论 1-1 单项选择 去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后精品好文档,推荐学习交流 仅供学习与交流,如有侵权请联系网
31、站删除 谢谢13 1、计算机中最常用的字符信息编码是()。(A)ASCII(B)BCD 码(C)余 3 码(D)循环码 2、-31D的二进制补码为.()。(A)1110000B(B)11100001B(C)01100000B(D)01100001B 3、十进制 29 的二进制表示为原码()。(A)11100010B(B)10101111B(C)00011101B(D)00001111B 4、十进制 0.625 转换成二进制数是()。(A)0.101(B)0.111(C)0.110(D)0.100 5、十六进制数 7 的 ASCII 码是()。(A)37(B)7(C)07(D)47 6、十六进制
32、数 B 的 ASCII 码是()。(A)38(B)42(C)11(D)1011 7、通常所说的主机是指()(A)运算器和控制器(B)CPU 和磁盘存储器(C)CPU 和主存储器(D)硬件和软件 8、使用单片机实现在线控制的好处不包括()(A)精确度高(B)速度快(C)成本低(D)能与数据处理结合 1-2 填空 1、计算机中常作的码制有、和。2、十进制 29 的二进制表示为。3、十进制数-29 的 8 位补码表示为。4、是计算机与外部世界交换信息的载体。5、十进制数-47 用 8 位二进制补码表示为。6、-49D的二进制补码为。7、计算机中的数称为,它的实际值叫。8、单片机的存储器结构形式有普林斯顿结构(又称冯.依诺曼结构)与哈佛结构,MCS-51 存储器采用的是 结构。1-3 问答题 1、何谓单片机?单片机与一般微型计算机相比,具有哪些特点?2、单片机主要应用在哪些领域?3、为什么 80C51 系列单片机能成为 8 位单片机应用主流?4、举例说明单片机的主要应用领域。去式过去分词都含有个把变为个仅供学习与交流如有侵权请联系网站删除谢谢精品好文档推荐学习交流把变为个过去 流如有侵权请联系网站删除谢谢精品好文档推荐学习交流改变辅音字母个改变元辅音字母个三型即原形过去式过去分 除谢谢精品好文档推荐学习交流除外词尾为辅个过去式将变为过去分词多在原形后加若那个辅音字母为或须双写或后