七年级上册英语全册语法知识点梳理

1、第一讲：动词 .Be 动词（am, is, are）的用法 口诀：1 用 am , you用 are ,is 连着他（山6）她（she）它（it）。单数全部用 is，复数一律都用 are.变疑冋， 往前提，句末问号莫丢弃，变否定，更容易， be 后 n ot 莫忘记， 句首大写莫迟疑。 I a stude nt. You Japanese. He my brother. She very n ice. My name Harry. LiLei very tall. This book very in teresti ng. Li Lei and I good frien ds. These a

2、pples. Those banan as. They stude nts. There some bread on the plate. The cat black. The black pants for Su Yang. Here some sweaters for you. There a girl in the room. There some milk for me. There some apples on the tree. Gao Shans shirt over there. Some tea in the glass. 二.一般现在时态 1. 用法：（1）.表示习惯性，经

3、常性的动作 ，常与 often, always, usually, every day/week/month 等词连用 I often play soccer. （2）.表示主语具备的性格或能力： He likes to eat bananas. 2. 在一般现在时态中，当主语是第三人称单数时，谓语动词也用第三人称单数 ，第三人称单数的构成规 则（主语不是第三人称单数时谓语动词用原形）： a. 一般情况下在动词词尾力口 s 女口： get-gets like-likes play plays， wantwants， work works， b. 以字母 s、x、ch, sh,o 结尾的动词力口

4、 -es : guess guesses fix fixes， teach teaches, brush brushes， go goes， c. 以辅音字母+ y 结尾的动词， 先变 y 为 i, 再力口 -es : studystudies, carry carries, fly flies，特殊词： have-has 一写出下列动词的三单形式。 take like play run do watch wish eat have want teach start go study 二用所给词的适当形式填空。 1. We ofte n _ (play) in the playgro und.

5、 2. He 7. At eight at ni ght, she _ (watch) TV with his pare nts. 8 _ Mike_ (read) En glish every day? 9. How many lessons _ your classmate _ (have) on Mon day? 10. What time _ his mother _ (do) the housework? 12. She _ (have) blues eyes. 14. The boy _ (like) playi ng football. 17. It _ (rain) quite

6、 often during the month of July every year. 19. Mike usually _ (ride) a bike with his friends in the park. 26. We _ (not watch) TV on Mon day. 27. Sandy usually _ (play) the pia no on Sun days. (get) up at six o clock. 28. The cat _ (like) eat ing fish every much. 29. Su Hai and Su Yang _ (have) eig

7、ht less ons this term. 30. She and I _(take) a walk together every evening. 34. She _ (like) fish, but she _ (not like) meat. 第二讲：代词 (一)人称代词及物主代词 ( (默写出此表格) ) 人称 第人称 第二人称 第一人称 第二人称 第三人称 第二人称单数 单数 单 复 数| 复 数 复 数 主格 I you he she it we you they 我 你 他 她 它 我们 你们 他（她、它）们 宾格 me you him her it US you them 我

8、 你 他 她 它 我们 你们 他（她、它）们 形容词 性物主 my your his her its our your their 名词性 物主 代 mi ne yours his hers its ours yours theirs 我的 你的 他的 她的 它 3的 我们的 你们的 他（她、它） 们 的 _ 一.主格只能作主语；宾格作宾语 L (主语)am hungry, please give me (宾语)something to eat. 我饿了，请给我一些吃的东西。 主语：句子要说明的人或事物 The sun rises in the east.太阳从东方升起。 He likes d

9、ancing.他喜欢跳舞。 谓语：主语的动作、状态和特征，由动词来充当 .We study English.我们学习英语 2. He is asleep.他睡着了。 宾语：动作、行为的对象 like China.我喜欢中国。) 2.You can help me.你能帮助我。 二形容词性物主代词修饰名词，必须放在名词前面，名词性物主代词相当于名词，后面不能再加名词 用所给词的适当形式填空 1. That is not _kite. That kite is very small, but _ is very big. ( I ) 2. The dress is _ . Give it to _

10、 . (she) 3. Is this _ watch? (you) No, it s _otl _ 4. _ is my brother. _ n ame is Jack. Look! Those stamps are _ . (he) 5. _ dresses are red. (we) What color are _ ? (you) 6. Here are many books, which one is _ ? (she) 7.1 can find my toy, but where s (you) ? 9. I have a beautiful cat. _n ame is Mim

11、i. These cakes are _ . (it ) 10. Are these _tickets? No, _ are not _ . _ aren (they ) t here. 11. Shall _ have a look at that classroom? That is _ classroom. (we ) 12. _ is my aunt. Do you know _ job? _ a nurse. （she ） 13. That is n ot _ camera. _ is at home. （he ） 14. Where are _ ? I can t find _ .

12、 Let s call （they） parents. 15. Don t touch _ . _ not a cat, _ a tiger! （it） 16. _ sister is ill. Please go and get _ . （she ） 17. _ don t know her name. Would you please tell _ e ） 18. So many dogs. Let s count _ （they.） 第三讲：名词 （一） 名词的分类 名词包括可数名词和不可数名词，可数名词有单，复数之分，单数在前面加 a/an 来表示 不可数名词没有复数形式，前面也不能用

13、 a/an 来表示单数。如： water， tea, bread, rice, milk, money, time.。 ice-cream, salad, chicke n（既可作可数名词，又可作不可数名词 ） （二） 可数名词复数构成规则 （1） 一般情况下在词尾力口 - s. book - books， dog - dogs， pen - pens，boy boys 辅音结尾的名词后的 s 的读音为s，以浊辅音和元音结尾名词后的 s 读音为z。 （2） 以 s，x， ch，sh结尾的词名词变复数时，要在词尾加 es. e.g. beach - beaches, brush - brushe

14、s, bus - buses, box boxes（ es 读音为iz （3） 以辅音字母+ y”结尾的名词，先变 y 为 i，再加 es. e.g. city - cities , family -families , documentary - documentaries, country - countries, （4） 以 o 结尾的名词有生命的词加 es 如：.tomato, potato, hero,Negro;无生命的加 s: .zoozoos, radio - radios 注：zero 变复数时，既可力口 s, 也可力口 es: zeros/zeroes 注： 不规则变化：

15、.man - men, woman - wome, Englishman - Englishmen, child - children , Chinese- Chinese, sheep-sheep, （5）另外， 当一个名词作定语说明另一个名词时，这个名词一般用单数 。 .five apple trees;, two girl friends,（此处 apple, girl 都不用复数，只有被修饰的名词用复数） 注：当 man 和 woman 作定语修饰复数名词时，两个词都用复数形式。 e.g. two men teachers 两个男老师， three women doctors 三个女医

16、生 可数名词复数前可用 many （许多）、a lot of/lots of （许多）、some修饰，不可数名词用 much, a lot of/lots of 修饰 2. 不可数名词没有复数形式，它的 量”的表示方式如下。 表确定数量时，一般用 数词+量词+of+不可数名词。女如： two/three/+量词复数十 of+不可数名词。a bag of rice, two glasses of milk , four bottles of water 3. 有些名词既可作可数名词也可作不可数名词，但词义有所不同。 .fruit 水果 - fruits表示不同种类的水果； chicken鸡肉 -

17、 a chicken小鸡；orange 橘汁 - an orange 橘子； （三）名词的所有格： 表示人或物的所属关系： 的 （1）有生命的名词所有格的构成： 一般在词尾加s. Mike s watqh Women s Day 妇女节 以 s 结尾的名词变成所有格时，只加 ,.teachers office , students rooms 表示共同拥有某物时，只需在最后一个名词后加 .s .Tom and Mike s roc 汤姆和迈克的房间（表示汤姆和迈克共有一间房）表示分别拥有某物时，需在每个名词后都加 s. e.g. Mary s and Jenny s 玛 5 丽丽和詹妮的自行车

18、（表示玛丽和詹妮各自的自行车） （2） 无生命的事物的名词所有格常用 of 结构 a map of China， the beginning of this game，the door of the room （3） 双重所有格：可同时用和 of 短语表示的名词所有格 .a fiend of my mother 我妈妈的一个朋友 a picture of Tom 汤姆的一张图片 1. 写出下列词的复数形式。 strawberry_ wish _ orange _ documentary _ man _ this _ you _ bus _ 三个西红柿 _ 两块手表 _ 一些蔬菜 _ 四辆公共汽

19、车 _ _ 一幅中国地图 _ 我朋友的生日聚会 _ 戴维和保罗各自的电脑 _ 教师们的书桌 _ 3. 选择填空 1、There _on the wall .They are very beautiful. A. are photoes B. are photos C. is a photo D. is photos 2. Would you like some ? A. rice B. rices C . a rice 3. There are four and two in the group. A. Chin ese B Chin eses, C. A Chin ese C.Ch in e

20、sese 4. That s _ art book. A. an B. a C. the D are 5. The boys have got _ already. A. two bread B. two breads C. two pieces of bread D. two piece of bread 7. There . some _ in the river. A. is ,milk B. are, milks C. is, milks D. are ,milk 8. There _ two . in the box. A. is;watch B. are ;watches C. a

21、re ;watch D. is; watches 9.1 want some to drink. A. orange B.apples C oran gesbaby _ photo _ Chinese _ key _ potato _ watch _ tomato _ dollar _ boy _ child _ that _ woman _ 2.翻译短语 五个草莓 _ 一些钥匙 _ 十个小孩 _ 八个女老师 _ 一张吉姆家的全家照 _ 汤姆的书包 _ 他们父母亲的房间 _ 鲍勃和琳达的书橱 _ 10. The two _ meet ing room is n ear the read ing

22、 room. A. woman teacher B. women teachers s C.woman teachers D.women teachers 11. In China_ are everywhere. A.apple trees B. apples trees C. apple tree D. apples tree 苹果树 第四讲：数词 （一） 基数词在英语中表示数目的词称为基数词。 1. 基数词的构成（1）1-20:one，two，three，four，five，six，seven，eight，nine，ten，eleven，twelve，thirteen， fourteen

23、， fifteen， sixteen， seventeen, eighteen， nineteen, twenty （2） 21-99 先说 几十”，再说 几”，中间加连字符。 23 宀 twenty -three，34thirty -four， 45forty Tive， （3） 101 999 先说 几百”，586 宀 five hundred and eighty -six， 803eight hundred and three （二） 序数词 在英语中表示顺序、次序的词称为序数词。 1.序数词的构成（1） 一般在基数词后加 th e.g. four 宀 fourth， thirteen

24、 thirteenth （2） 不规则变化 one T first, two second，three third， five fifth， eight eighth， nine ninth， twelve - twelfth （记住基数词变序数词的口诀 ） （3） 序数词的缩写形式为：阿拉伯数字加上这个词的末尾两个字母。 first:1st second:2nd，fou比 4th， 23rd， 一. 写出下列数字的基数词和序数词 5. _, _ 32. _, _ 12. _ , _ 20. _, _ 1. _, _ 2. _ , _ 3. _, _ 8. _, _ 9. _ , _ 写出基数

25、词变序数词的口诀： 二. 翻译： 1 65 个班级 27 个男生 2. 82 岁 44 位女老师. 3. 3 本字典 2 个图书馆. 4. 12 个月 18 个妇女 5 22 个孩子 六杯茶 第五讲：介词 (1) in , on， at In 用于年、月及早上、下午、晚上前 in 1989, in Janu ary, in the morning , in the after noon , in the eve ning。 on表示具体某一天 及某一天的早、中、晚。 on May 1st, on Monday, on New Year Day, , on the morning of June

26、 2nd , on Sun day after noon 等。 at 表示某一时刻 或较短暂的时间：at 3:20, at this time of year,. （2）with表示用 工具、手段；和 .一起；具有，带有 in用语言（语调、颜色）等； He comes to the classroom with a book in his hand.（手）.（带着） The teacher spoke to us in En glish. We have clothes in all colors. （3）for 的用法 1 ）供用，给的 Is this apple for me?这个苹果是给

27、我的吗？ Here is a letter for your mother.这儿有你妈妈的一圭寸信。 2）作用（表用途） Do you n eed bags for sports?你需要运动包吗？ I need a cup for milk.我需要一个装牛奶的杯子。 3 ）就 . 而言，对于 . 来说 For lunch, I like hamburgers and salad.午饭我喜欢汉堡和沙拉。 For girls, we have T-shirts in all colors.女孩子们可以买到各种颜色的 T 恤衫。 4 ）以 . 的价格（表交换、价格） You can buy sock

28、s for only 5 dollars each.你可以买到每双只卖 5 美元的袜子 1. I always play games _ my sister. A. of B. with C. about D. at 2. Chi na is a country _ a long history. T here is an apples on the table. 桌上有个苹果 There are some strawberries on the chair. 注：当句中有 2 个或 2 个以上主语时， be 动词要与其最近的主语保持一致： There is a teacher and 54

29、students in our classroom.(be 动词与最近的主语 a teacher 保持一致 ) There _ some bread on the table. A. is B . are C ,has D. have There _ some bananas and a pear in the bag. A. is B . are C ,has D. have There _ a pear and some bananas in the bag. 第七讲冠词 1.种类：(1)不定冠词：a / an (2 )定冠词：the 元音音素开头的可数名词前用 an : an egg /

30、 an apple / an orange / an eraser / an ID card / an art lesson / 2.定冠词的用法：(1)特指某(些)人或某(些)物： The ruler is on the desk. (2 )指上文提到的人或物： He has a sweater. The sweater is new. (3 )用在序数词前： John s birthday is Febuary the second. 用冠词填空： 1. What s this? It s _ clock. 2. What s that? It s _ alarm clock. A. wi

31、th B. on C. or 3. The girl _ red is my sister. A. for B. with C. at 4. _ girls, we have red skirts. A. for B. with C. at 5. _ The T-shirt is twenty yua n. A. for B. with C. at 6.I have chicke n lunch. A. for B. with C. at 1.句型： 表示 某地有某人或某物 There is +单数可数名词或不可数名词 D. at D. i n D. i n D. in D. in 第六讲：T

32、here 3. I have a sweater. _ sweater is new. 4. May is _ fifth month. Starter Un it 1- Starter- Un it3 复习A. /; / B. a;/ C./; a D. a; a 1. How are you?你(身体)好吗？ (I m) fine/Very well/l , ThankOKu./thanks. How are you? / And you? 我很好，谢谢。你呢？ (I m)fine/OK, too 我也很好。 2. What s this/that in English?这/那用英语怎么说

33、？ I j a/an + 单数物品 (不说 This/That is .) 3.in Chinese/English/Japanese 用汉 /英/ 日语 Spell it, please. = Please spell it.请拼读它。 What color is + 单数名词？ It s /It is 颜色. What color are + 复数名词？ They re/They are +颜色. What color is the key?(这把)钥匙是什么颜色的？ It $ It is) yellow.(它是)黄色的 What color are the keys?这些钥匙是什么颜色的

34、？ They re (They are) red.(它们)是红色的 Unit1-Unit9 复习 1. Are you Helen?你是海伦吗？ Yes, I am.是的，我是。/ No, I m not. I 不，我不是。我是吉娜 2. 问电话号码： What s your/his/her telephone number?t s 号码. 3. Are these / those 这/?那些是 . 吗？ Yes, they are. / No, they aren t. 4. the photo of your family = your family photo 5. thanks / t

35、hank you for .后接名词或动词 ing.为.而感谢 Thank you for helping me. 6. 5.ort 运动”修饰名词时，总是用复数形式 。sports meeting 运动会 sports shoes 运动鞋 7. play/do sports 做运动.watch TV 看电视 8.on TV/ /on the computer/on the phone 在电视上/在收音机上/在电脑上/在电 9. call sb at +电话号码： 拨打.号码找某人” Call Alan at 4953539.拨打 495-3539 找艾伦 10. some 和 any （些）

36、1） some 一般用于肯定句，any 用于否定句和疑问句 11. do/does :1）作助动词，帮助构成一般现在时的否定句或疑问句，无意义。 Do you have a soccer ball?你有足球吗？ I don t kno 我不知道。 2）作实义动词， 做，干” I do my homework every day.我每天都做家庭作业。 Bob does his homework every day. 鲍勃每天都做家庭作业 12. 询问价格 ow much is + 单数商品？ How much are + 复数商品？ It s 钱 LThey re +钱 how many/how

37、 much 13 .询问数量 how many +可数名词复数，how much +不可数名词 你有多少苹果？ How many apples do you have? 你想要多少水？ How much water do you want? .1.3.socks 袜子，shoes 鞋，pants 裤子,trousers 裤子等都是成双成对的物品，一般以复数形式出现，作主语时谓语动 词用复数形式。 但它们和 a pair of （一双、一副或一对）连用作主语时 ，谓语动词要与 pair 在数上一致。 The pa nts are Tom s.这条裤子是汤姆的。 This pair of pa n

38、ts is Tom s.这条裤子是汤姆的。 14. want to do sth. 想要做某事 on sale 出售；廉价出售 for sale 待售 15.I ll take 我买了 at very good prices 以合理/优惠的价格 16. 问年龄用 how old +be + 主语？答：主语 + be +基数词(years old) How old are you? I m fifteen(years 你多大了？我 15 岁 How old is he/she? He/She is twelve(years old) 17. have a good time = have fun

39、 玩的开心 18. What your favorite subject? 你最喜欢的学科是什么？ =What subject do you like best? My favorite subject is math.我最喜欢的学科是数学。 =I like math best. 19. have +学科：上某一学科的课。 have English上英语课 have a class / less on 上课 have breakfast / lunch / dinner 吃早饭 / 中饭 / 晚饭 have a soccer game 举行足球比赛 .20. That s for sure 确

40、如此。 A. /; / B. a;/ C./; a D. a; a 一、单项选择。 ()1. Its _ black . Its _ black ruler .()2. is that quilt? A. is B. are Its black .A. Which color B . How color C. What color D. Whats color )5 . 一 What color is her jacket? Its A. My, he B. His, her C. his, Her D. Her,his )7.His name is Bill Gates. We call h

41、im _ . A. Mr Bill B. Mr Gates C. Mrs Gates D.Mrs Bill )8.Whats her family name? Its 11 Is that your mother ? 12.Is he your father? A. No, he is B Yes, hes C. No, he n ot D. Yes, he is are you Jack? No, Im not. )17.Where is my book? Its under A. my the B. the my C. my )18.Where is my ruler? _ . A. Ye

42、s, it is here. B. No, it is not on the desk. C. Its un der the desk. )19 .Is your key in the drawer? A. Yes, I am. B. No, it is. C. Yes, it is. D. No, Im not. )20.Where his keys?)3 . 一 Whats this? Its “ Mm A . a, a B . an , an C. )4. Whats that En glish? A . at B . to C . in ,an D. / D. on A . an or

43、ange B . orange C . the orange D . a orange )6. Whats this? a map. A. Its B. This is C. Thats D. Its n ame is Mark and name is Gina. A. Mary Brown B. Mary C. Brown ).9.Whats your phone number, Nick? 5881614 A. Its B. It C. It 10. Is Li Fa ng your frie nd ? Yes, _ is . A. his B. her C. she D. he A. Y

44、es, its. B. No, it is. C. Yes, it is D. No ,it not. )13. B. Excuse me A. Sorry )14 Is this his case? _ A.Yes, this is . B. Yes, it isnt. )15.Call Ala n 994-5863. A in B. with )16 Whats this _ En glish? A. in, a B. with, an C. Im D. Thanks C. No, it is. D.No, it isnt. C. on Its C. in, an D. at eraser

45、. D. With, a table . ( )21 Do Lucy and Lily have a baseball? Yes, _ . A.she does B.she has C.they do D.they have ( )22.Lets play basketball. No, _ . A.its bori ng B.its in teresti ng C.its good D.its fun ( )24. Do you play _ ? A.basketballs B.a basketball C.basketball D.the basketball ( )25. Lets _

46、. A.play pin g-p ong B.to play pin g-p ong C.play ing pin g-p ong D.play the pin g-p ong ( )26. Let _ play sports. A.we B.us C.is D.has ( )27.My mother _ oran ges or strawberry . C. does nt like D. does nt likes A. Yes , I do B. Yes , they do C. No , I dont D No , they do ( )29. There is some _ in t

47、he bag . A. apple B. salad C. tomato D. banana ( 30. My sister likes some _ . A. apple B. banana C. pear D. salad ( ) 31.1 like _ oran ges. I dont like _ orange. A .these, those B. those, the C. that, these D. / , / ()32. Bill and Bob _ like bananas. A. does B. dont C. not ( )33. _your brother _ Fre

48、nch fries? A. do like B. does like C. Does like D. Do like ( )34.The women _ red is my mother. A. at B. in C. with D. of .We have T-shirts in blue,yellow,red and black _ only 20 yua n. A. by B. in C. for D. with ( )32. He buys this sweater_ a very low price. A. in B. on C. at D. with 33. _ your pan

49、ts? Yellow. A. How much is B. What color are C. whats color is D. What color is 34. We can _clothes _ this shop. A. buy;to B. buy; from C. sell; from D. buy; for 35. The yellow shorts _ 15 yua n . A. is on sale B. are on sale C. are on sale for D. is on sale for 36. What color is it? Its _redts _ re

50、d apple. A. a, an B. /, a C. /, an D. a, a A. dont like B.do likes ()28. Do they like broccoli ? D. does A. food B.subject C. color D. sport 37. How much are these black socks? A. Its 10 yua n. B.lts 10 yua ns. C. Theyre 10 yua n. D. Theyre 10 yua ns. 38. When is your birthday? It on s. A . February

51、 B . second C. February seco nd D . 1990 39. _ The month of the year is April. A.first B.second C.third 40. _ is very difficult. A . Less on fifth C . Fire less on D.fourth B . The lesson fifth D . The fifth lesson month is December. A . twelve, twelve B . twelfth, twelfth C . twelve, twelfth D . tw

52、elfth, twelve 42.My mothers birthday is on _ . A. July 22st B. July 22th C. July 22 nd D. 22nd 43-How old are you ? -Im _ . A. twelfth B. twe ntieth C. twelve D. twe nties 44.S un day is the _ day of the week. A.first B.seco nd C.last D.third .45 _ is your aunt ? She is thirty. A.When B.When old C.H

53、ow old D.How 46.Happy Birthday to you ! _ . A.Thats all right B.The same to you.C.Tha nk you D.Thats OK. 47. When is _ birthday. Its November 11th. A.Sallys B.Sally C.Sallys D.Sally is 48.Our school has a speech con test _ October 16 each year. A.in B.o n C.at D.for 49 _ does she like music? - Becau

54、se she thinks it is relax ing. A. What B. When C. Why D. How 50. - Whats your mothers favorite color? - - favorite color is _ . A.She; red B.Her; blue C.She; banan as D.Her; math 51 _ is your art teacher? - Mrs Zha ng. A. Who B. What C. When D. Where 52. -What _ does he like best? Football. 53.Sit d

55、own , P1ease A. food B.subject C. color D. sport 41 . There are _ mon ths in a year. The 54. -Colin , what s this in English? - _ . A . This is a pen B. It s a pen C. It s pen 55 My n ame is _ . 56. Are you a middle school stude nt now? 61. _ is Mary Zhang . _ father is a teacher. A. She; Her B. He

56、; His C. She ; His D. He ; Her 62. This is _clock. It s _ English clock. A. a, a B. a, an C. an, an 63. What s that _ Chinese? A. at B. in C for D. on 64. Please call me _ 256-5896 A. at B. for C. on D. to 65. _ -Your bag is very nice.- ? A. That s all right. B. Here you are C. You don tDkn owank yo

57、u 66 _ are good frien ds. Mike and I B.I and Mike C. Mike and me D. Me and Mike 67.A re you Jenny?-Yes, _ . A. it is B. you are C. I m D.I am 68 That s a girl. Her name is A. Wang Xiaoho ng B. Wang Xiao Hong C. Wang xiaoho ng D. Wang xiao hong 69Is that your father? Yes, _ .A.he is B.it is C.she is

58、D.he s 70.Here is your family. A.a photo B .a photo of C.a photo for D. photo of 71.Thanks the photo your family. A. to of B.at of C. for at D.for of 72.This is eraser. eraser is nice. 73 -Where is my football? -It s _the desk _ the floor（地板） A . I m fine B. OK C. Thank you A. Green Mary B. Mary Gre

59、en C. mary gree A. No, I m B. Yes, I do. C. Yes, I am. 57. _ This is _ apple, and that is oran ge. A. a; a B. a; an C. an; an D. an; a 58. This is Tom Smith. is first n ame. A. tom; his B. Tom; her 59.Is this his pen? _ . It s her pen. A. Yes, it is B. No, it isn t C. No, it is D. Yes, it is n t 60.

60、 _ , is this your eraser? C. Smith; his D. Smith; her A. OK B. Good morni ng C. Hello D. Excuse me D. an, a A. a The B. the A C. an The D. the The A. on un der B. on on C. un der un der 74I like to watch football games _ TV . A.o n B.at C.in 75. He _ baseballs. A.do nt play B.does nt plays C.does nt