陈述句变一般疑问句和否定句一般疑问句=助动词+陈述句剩余部分否定句=找出助动词，在助动词后加not一、助动词：帮助动词构成时态、语态、感情色彩和否定疑问句。它包括 be动词，do的各种形态，have的各种形态，will等情态动词。I am watching TV. am在句子里不能独立做谓语，也没有具体的含义。行为动词：就是在句子里能独立充当句子成分，又具体的含义。I am watching TV.助动词用途be动词的各种形态(isamarewaswer e)帮助动词构成现在进行时：be +ving 构成被动语态：be+vedE g： I am a girl.Am I a girl?Yes, you are. No, youre not.re not= are notShe is a girl.Is she a girl? Yes, she is.No, she is not.You are a girl.Are you a girl? Yes, Iam. No, Im not.I am watching TVAm I watching TV? Yes, you are. No Im notdo的各种形态(dodoes did)帮助动词构成现在时态：v vses过去时态：vedE g1:I like dancing. like=like+doI do not like dancing. Do you like dancing?E g2:She likes dancing.likes=like+doesShe does not like dancing. Does she like dancing?E g3：I liked dancing.liked=like+didI did not like dancing. Did you like dancing?have的各种形态(havehashad)帮助动词构成完成时态：现在完成时态：havehas+ved过去完成时态：had+vedEg1：We have finished our homework.She has finished_her homework.Has she finished her homework?Yes, she has.No, she hasnt.will的各种形态(willwould):帮助动词构成将来时态:willwould+vI will go home at five o clock.canmaymustshallshouldwillwouldneed等情态动词它们不帮助动词构成各种时态或语态， 但是它表达动词的一定的感情色彩。而 且，它们后面的动词用原型。也就是说， 不考虑这个动词的时态和主谓一致。I can do itYou should go home.二、有的助动词既可以做助动词又可以做行为动词:be动词可以做行为动词，也可以做助动词。行为动词是有实际意思，表示具体的动作，在句子里能够独立充当句子成分。助动词是不具 有实际意思，在句子里不能独立充当句子成分，只是帮助动词构成各种时态和语态动词做助动词例子做行为动词例子do构成一般时态助动词是doI dont like apple.我不喜欢苹果。翻译为“做” 后面跟宾语。助动词是doEg: do homework做家庭作业do是谓语动词，be构成进行时和被动语态助动词是beI am reading.我正在读书 This book is bought. 这本书被买。翻译为“是” 后面跟宾语。助动词是beI am a girl. 我是女孩。I am beautiful.我漂亮。 am是这个句子的谓语，翻译为“是”具有实 际意思。have构成完成时助动词是haveI have finished my homework.翻译为“有” 后面跟宾语。助动词是doEg: I have many jobs. 我有很多工作。Have是谓语动词，翻译为“有”needneed做助动词 时是情态动词， 表示“有必要” 的意思助动词是needEg: I need go home.need是情态动词，表示“有必要”Need you go home?Yes, I need.No, I needn t. needn t= need not表示“需要”， 是及物动词后 面要跟宾语。助动词是doEg: I need you.我需要你need=need+doneed是实意动词，在句中独立做谓语，表示“需要”Do I need you?Yes, I do.No, I needn t.三、学会通过助动词来判断谓语动词，来帮助读懂句子。1、四类助动词，只有do是包含在谓语动词里的，其它的三个都是在谓语动词前面的。2、很多助动词既可以做助动词又可以做实意动词。当做助动词的时候，后面跟动词。当 做行为动词的时候，后面跟名词。四、考题类型:考题类型做题方法例子改写句子一、先看有没有be的各种 形式、have的各种形式或情 态动词，没有就说明这个句 子的助动词是do。因为在句子里助动词的位 置是：be的各种形式、have 的各种形式或情态动词在 谓语动词的前面，变否定be的各种形式、have的各种形式或情态动词在谓语动词的前面。He is going to see his uncle this afternoon.He is not going to see his uncle this afternoon.Is he going to see his uncle this afternoon.I have finished my homework.I have not finished my homework.Have you finished your homework.Da Shan can speak Chinese well.句：只要在它们后面直接加 not,而助动词do常隐藏在 谓语动词里的。这时要先把 助动词找出来，提前，再加not。变一般疑问句：只要把助动 词提前。二、但是若这些词后面是否是名词，说明他 们是行为动词，它的助 动词就是do。例子见 上表。Da Shan can not speak Chinese well.Can Da Shan speak Chinese well.助动词do常隐藏在谓语动词里的。这时要先把助动词找出来， 提前，再加not。I study English well.study=study + do（当谓语动词是原形时，助动词就是do）He studies English well.studies = study+does（当谓语动词后面加了-s-es，助动词就是does）He studied English well. studied=study+did（当谓语动词后面加了-ed，助动词就是did）He does not study English well.把谓语动词提前，动词用原形，再not。用所给词 组成句子先把助动词放到句首， 再找出主谓宾，按照句 子结构排好，组后加上 问号。例 1、 beautiful , a , she, pen, have主语：名词、代词、数词本题中可能是主语的：she, pen谓语：行为动词、be动词本题中动词是：have “有”定语：形容词本题中定语是：beautiful主谓兵：she have pen.很明显beautiful和a都是用来修饰pen. 答案为： She has a beautiful pen.例 2、 he, rice, does, for , lunch, have ?主语：名词、代词、数词本题中可能是主语的：he, lunch, rice谓语：行为动词、be动词本题中动词是：have 有”,for很明显have的兵语是rice 介词for的兵语是lunch.答案为： He have rice for lunch.Does he have rice for lunch ?五、作业（一）用所给的词组成句子1、beautiful , a , she, pen, have1、he, rice, has , for , lunch.2、chicken, they , have, for ,rice, and ,lunch, tomatoes.3、school, after, Mary, goes, breakfast, to .4、in, a ,something, price, we, good , have.5、let, us, play, basketball6、believe, cant, my, eyes, I7、are, goods, in, there, the, lots, shop, of8、how, T-shirt, how, is , your ?9、much, nice, are, these, how, socks?10、thirty-two, the ,are, dollars, books.11、good, the, many, a, colorful, coats, at, sells, price, shop.12、to, sister, loves, buy my, Huaxings , on, T-shirts, sale.13、buys, Cindy, her, shop, some, from, flowers, this, mother.14、your, is, party fathers, birthday, when?15、birthday, May, on, party, is, the, Janes, first.16、is, September, Nicks, birth, Twenty-first, of, date.17、our, Kate, oldest, in ,is, class, the.18、your, how, old, is , brother?19、I, very, comedies, much, love.20、to, does, movies, want, see, she, a?21、my, Jack, actor, is, favorite.22、Beijing , I, Opera, I, movies, like, and, too, like .23、movies, do, what, you, kind, like, of?24、need, you, do, bags, sports, for25、much, game, how, is, the, computer.26、are, color, shoes, what, those27、his, have, sister, does, red, a, T-shirt28、likes, shoes,