小学英语四种时态知识点加练习一、一般现在时一. 意义：表示经常发生的事情，动作或存在的状态二. 构成及变化1.be动词的变化。

肯定句：主语+be(am,is,are)+其它。

如：I am a boy.我是一个男孩。

否定句：主语+ be + not +其它。

如：He is not a worker.他不是工人。

一般疑问句：Be +主语+其它。

如：-Are you a student? -Yes. I am. / No, I'm not.特殊疑问句：疑问词+一般疑问句。

如：Where is my bike?2. 行为动词的变化。

l、当主语为第一，二人称及复数时，助动词为do肯定句：主语+动词原形(+其它)。

如：We often play basketball after school.否定句：主语+ don't+动词原形(+其它)。

如：we don’t play basketball after school.一般疑问句：Do +主语+动词原形+其它?如：Do you often play basketball after school? Yes, we do. / No, we don't.特殊疑问句：疑问词+以do开头的一般疑问句？如：What do you often do after school ?２、当主语为第三人称单数时,助动词为does肯定句：主语+动词三单式(+其它)。

如：He swims well.否定句：主语+ doesn’t+动词原形(+其它)。

如：He doesn’t swim well..一般疑问句：Does +主语+动词原形+其它。

如：Does he swim well ?Yes, he does. / No, he doesn't.特殊疑问句：疑问词+以does开头的一般疑问句？如：How does your father go to work?三．第三人称单数的动词变化规则（只有在第三人称为主语的肯定句中，动词才用三单式）(1)多数动词直接加s: runs gets likes collets takes plays climbs…….(2)结尾是s, x, sh, ch, o,前为辅音字母, 结尾加es :watches teaches goes does washes crosses mixes brushes(3)动词末尾y前为辅音:将y改为i加es: study→studies fly→flies carry→carries cry→cries但在y前如果为元音则直接加s:buys says四．时间标志：always , usually , often , sometimes ,every…一般现在时练习题I.用下列单词的适当形式填空1.We often___________(play) in the playground.2.He _________(get) up at six o’clock.3.__________you _________(brush) your teeth every morning?4.What________________(do) he usually________________(do) after school?5.Danny ________________(study) English, Chinese, maths, science and Art at school.6.Mike sometimes __________(go) to the park with his sister.7.At eight at night, she __________(watch) TV with his parents.8.________ Mike________(read) English every day?9.How many lessons_________your classmates________(have) on Monday?10.What time_________his mother_________(do) the housework?II.改句子1.Do you often play football after school? (改为肯定句)2.I have many books.（改为否定句）3.Gao Shan’s sister likes playing table tennis （改为否定句）4.She lives in a small town near New York.（改为一般疑问句）5.I watch TV every day.（改为一般疑问句）6.We have four lessons.（改为否定句）7.Nancy doesn’t run fast （改为肯定句）二、现在进行时一、概念现在进行时表示说话时正在进行或发生的动作,也可表示当前一段时间内的活动或现阶段正在进行的动作。

结构：助动词be ( am / is / are ) +现在分词.二、现在分词的构成：1.大多数动词后可在动词后直接加-ing．Eg: carry-carrying,catch-catching,drink-drinking, enjoy-enjoying hurry-hurrying ,do-doing , read-reading , think-thinking2. 如果动词以-e结尾,则去掉-e,再加-ing,如come-coming , have-having , make-making,ride-riding,write-writing,take-taking,use-using．3. 如果动词只有一个元音字母,而其后跟有一个辅音字母时,将此辅音字母双写,再加-ing 如：hit-hitting,let-letting, put-putting,run-running,sit-sitting．4. 如果动词有两个音节,且重音在第二个音节上,则末尾的辅音字母须双写,再加-ing, 如: forget-forgetting,prefer-preferring,upset-upsetting．试比较benefit/benfiting, differ/differing,profit/profiting,这些词的重音在第一个音节上,因此其末尾的辅音字母不双写．5. 以-ic 结尾的动词,应先把-ic 变为-ick,再加-ing,eg: panic/panicking,picnic/picnicking,但lie/lying ,die/dying,tie/tying是特殊变化要记住．三、句型结构：1.现在进行时的肯定形式、否定形式、疑问形式及其回答,所有变化都体现在助动词be ( is / am / are ) 上．1)现在进行时的肯定形式：主语+be(am/ is/are)+doing+其他成分I am singing . They are writing .2)现在进行时的否定形式:主语+be(am/ is/are)+not +doing+其他成分I am not singing . They aren’t writing .3）一般疑问句及回答：be(am/ is/are)+ 主语+doing+其他成分Am I singing ? Yes ,you are . / No ,you aren’t .Are they writing ? Yes ,they are . / No ,they aren’t .4)特殊疑问句及回答:特殊疑问词+be(am/ is/are)+主语+doing+其他成分What are you doing ? We are playing (要求就提问内容具体回答).2. 缩写形式如下:I am---I’m You are---You’re He is---He’s She is---She’sIt is---It’s We are---We’re They are---They’re3.说明: 不是所有动词都能用现在进行时态的,如：see、like、want、know 等动词往往都不用进行时态．四．用法：1.表示现在( 指说话人说话时) 正在发生的事情．往往与now,at the moment,just 等副词连用,以示强调．We are waiting for you. What are you doing? Some one’s knocking at the door．2.正在进行着的动作可视为未完成的动作：He’s talking to his friends in the classroom.可用still 一词强调动作的持续性He’s still talking to his friends in the classroom.3. 表示长期的或重复性的动作,说话时动作未必正在进行．Mr. Black is writing another article.Don’t take that book away. Your father’s using it.She is learning piano under Mr. Black.4.现在进行时可用来表示不会长期发生的动作或情况,或被认为在短期内正在进行的动作或存在的情况：What’s your brother doing these days? He’s studying English at Oxford University.5.现在进行时也可以用来表示当前的动向：People are becoming more and more beautiful these days.6. 表示渐变的动词有：become,turn,get,grow,run,go,begin等．The leaves are turning brown.It’s getting colder and colder.7.与always,constantly,forever 等词连用,表示反复发生的动作或持续存在的状态,往往带有说话人的主观色彩．You are always changing your mind.8. 现在进行时(以及be going to）可以表示为将来安排好的活动和事件We’re spending next winter in China. 用arrive,come,go,leave 等动词的现在进行时描写行程安排,也通常有“将到达”和“将离去”的意思：He’s arriving tomorrow morning.9.当现在进行时表示某事发生的次数过多时,则有时含有抱怨,讨厌,赞扬等的意思：He is always singing at night,and we can’t fall asleep late at night.现在进行时练习题一.用现在进行时完成下列句子:1. ______you__________(fly) a kite? Yes,_______.2. ______you___________(sit) in the boat?3. ______he_____________(talk) with me?4. We_______________(play) football now.5. What_________you__________(do)?6. I_____________(sing) an English song.7. What________he____________(mend)?8. He______________(mend) a car.9. These boys _________ (play) tennis on the playground.10. My mother______________ (cook) in the kitchen.11. We can’t help you,because we ____________ (have )classes.12. ________ the boy ___________ (write) his homework?13. Look! These butterflies _________ (fly) in the sky.14. Listen! The girl ___________ (sing) in the next room.15. The naughty boy __________ (swim) in the river.二.选择1. Look. Lucy is_____ a new bike today.A. jumpingB. runningC. riding D takeing2. The children _____ football.A. is playingB. are playingC. play theD. play a3. They ______TV in the evening. They do their homework.A. are watchingB. can’t watchingC. don’t watchD. don’t watching4. Listen! She____ in the classroom.A. is singingB. sing C .to sing D. is sing5. ______are you eating? I’m eating ______ meat.A. What,someB. Which,anyC. Where,notD. What,a6. Is she ____ something?A. eatB. eatingC. eattingD. eats7.My dictionary ___,I have looked for it everywhere but still___ it.A. has lost,don’t findB. is missing,don’t findC. has lost,haven’t foundD. ismissing,haven’t found.8..Having a computer for personal use is no easy task because technology _______ so rapidly.A. is changingB. has changedC. will have changedD. will change9. The building_______ ,I can’t stand the noise.A. was being builtB. is builtC. is being builtD. builds10. I can’t catch up with the fashion,because the clothes style_______ all the time.A. has changedB. is changedC. is changingD. changed一般将来时一、概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事。