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1、 be动词、一般动词和助动词一、be动词、一般动词的现在式（1）be动词的现在式am/are/isbe动词的含义a.是（表状态）We are happy.我们很高兴b.在（表存在）She is in America.她在美国主语+be动词主语be动词例句第一人称amI am a boy.第二人称areYou are my sons.第三人称的单数名词isHe is my student.be动词的否定句含be动词（am/are/is）的肯定句变成否定句时，在be动词后加not即可。肯定句：主语+am/are/is否定句：主语+am/are/is+notHe is a good baseball
2、 player.他是一个好棒球员（否定句）He is not a good baseball player.=Hes not a good baseball player.=He isnt a good baseball player.be动词的疑问句含be动词（am/are/is）的肯定句变成疑问句时，将be动词拿到主语前，句尾加？即可。肯定句：主语+am/are/is疑问句：Am/Are/Is+主语？1.That is his camera.那是他的相机（疑问句）Is that his camera?2.The girl is a junior high school student.那女
3、孩是初中生（疑问句）Is the girl a junior high school student?O Be动词开头的疑问句为一般疑问句，可用yes或no回答，而答句中的主语用代名词（问句）Am/Are/Is+主语？（答句）Yes,主语+am/are/is No,主语+am/are/is not1.Is that man your math teacher?Yes, he is./No,he is not.2.Are you eating your lunch?Yes, I am./No, Im not.（2）一般动词的现在式一般动词的含义凡是日常生活中具体的动作，如：eat-吃饭，walk
4、-走路及抽象的动作如：like-喜欢，think-思考皆为一般动词主语+一般动词人称数单数复数第一人称I like dogs.We like dogs.第二人称You like dogs.You like dogs.第三人称He likes dogs.They like dogs.O 一般动词加s或es的方法a.大部分动词加sworks/playsb.一般动词词尾为o/s/sh/ch时。加esgo-goes/wash-washes/watch-watchesc.一般动词词尾为字音+y时，去y加iescry-cries/study-studies 助动词have和hashas为have（有，吃）
5、的单数形式They have a lot of money.He has a lot of money.一般动词的否定句含有一般动词从肯定句变为否定句时，不可直接在一般动词之后加not，必须使用助动词do/does/did。且助动词之后用原形动词，因为助动词表示了时态、数的变化。do用于主语为I/you/复数does用于主语为第三人称单数she/hedid用于过去式，不分人称和数均可用肯定句：主语+一般动词否定句：主语+do/does/did+not+原形动词1.The twin brothers go to school by bus.这对双胞胎兄弟坐公交车上学（否定句）The twin b
6、rothers do not（=dont）go to school by bus.2.Samhas dinner at the restaurant.（否定句）Sam does not（=doesnt）have dinner at the restaurant.比较否定句a.be动词He is my boyfriend.He is not my boyfriend.b.一般动词He likes dogs.He does not like dogs.一般动词的疑问句含有一般动词的肯定句变成疑问句时，不可将一般动词拿到主语前，必须用助动词do/does/did，且助动词之后用原形动词。肯定句：主语
7、+一般动词疑问句：Do/Does/Did+主语+原形动词？1.You visit your grandmother on Sundays.（疑问句）Do you visit your grandmother on Sundays?2.He es from England.（疑问句）Does he e from England? 助动词do/does/did开头的疑问句（即一般疑问句），其回答（问句）Do/Does/Did+主语+原形动词？（答句）Yes,主语+do/does/did No,主语+dont/doesnt/didntDoes the little boy go to school?
8、Yes,he does./No,he doesnt.比较疑问句a.be动词She is beautiful.Is she beautiful? Yes, she is.b.一般动词She loves tennis.Does she love tennis? Yes,she does.二、be动词、一般动词的过去式Be动词的过去式表示：过去时间中发生的状态1.（现在式）He is busy now.（他现在很忙）（过去式）He was busy then.（他那时很忙）2.（现在式）My parents are at home now.（过去式）My parents were at home y
9、esterday.时间副词改变，动词也应改变。 was和were现在式过去式be动词amisarewaswerebe动词过去式的否定句含be动词过去式was/were的肯定句边否定句时，在be动词后加not.肯定句：主语+was/were否定句：主语+was/were+not1.Mr.Brown was a vet.Brown先生是一个兽医（否定句）Mr.Brown was not（=wasnt）a vet.2.Joe and Brain were in the living room at that time.（否定句）Joe and Brain were not （werent）in th
10、e living room at that time.be动词过去式的疑问句含be动词过去式was/were的肯定句变疑问句时，将was/were拿到主语前，句尾加？即可。肯定句：主语+was/were疑问句：was/were+主语？1.Wendy was in the seventh grade last year.Wendy去年读七年级（疑问句）Was wendy in the seventh grade last year? Be动词开头的疑问句，可用yes或no回答，而答句中的主语用代名词。（问句）Was/Were+主语？（答句）Yes,主语+was/were/No,主语+was/we
11、re+not.Were you a pianist?你是钢琴家吗？Yes, I was./No, I wasnt.一般动词的过去式规则变化不规则变化原形动词+edhelp-helped/spell-spelled/want-wanted原形动词词尾有e+d love-loved/dance-danced原形动词为子音+短元音+子音：双写词尾+ed stop-stopped/plan-planned原形动词词尾为子音+y：去y+ied study-studied/cry-criedeat-ate/take-tookread-read/give-gaveride-rode/teach-taught
12、e-came/see-sawgo-went/have-had1.Iwalk to school every day.（过去式）I walked to school yesterday.2.Mothergoes to a supermarket every morning.（过去式）Mother went to a supermarket yesterday.主语为第三人称单数时，动词过去式不加s。一般动词过去式的否定句含一般动词过去式的肯定句变否定句时，不可直接在一般动词之后加not，必须用助动词did（不分人称和数），而助动词之后用动词原形。肯定句：主语+一般动词否定句：主语+did not
13、+原形动词1.Hecalled you last night.他昨晚打你（否定句）He did not call you last night.2.My sister and I watched TV all day yesterday.（否定句）My sister and I didnt watch TV all day yesterday.比较否定句过去式a.be动词She was at home.She wasnt at home.b.一般动词She studied English.She didnt study English.一般动词过去式的疑问句含有一般动词过去式的肯定句变为疑问句
14、时，不可将一般动词拿到主语前，必须用过去式助动词did，且did之后必须用原形动词。肯定句：主语+一般动词过去式疑问句：Did+主语+原形动词？1.His friends went to that movie case week.（疑问句）Did his friends go to that movie last week.（答句）Yes,they did./No,they didnt.2.Gracewrote a letter to David.（疑问句）Did Grace write a letter to David?（答句）Yes, She did./No,she didnt.比较疑问句过去式a.be动词He was sick.Was he sick.b.一般动词He did his homework.Did he do his homework?三、助动词所谓助动词是和原形动词合在一起，用来表现时态、语态、语气的动词。此外，助动词也能表示疑问、否定、强调助动词的特点1.其后须接原形动词He can speak English.He can speaksEngl
