小学英语语法之--现在进行时[详解、练习、答案].doc

小学英语语法之 现在进行时详解、练习、答案一、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-using3. 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-sitting4. 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 arent 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 arent .Are they writing ? Yes ,they are . / No ,they arent .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-Im You are-Youre He is-Hes She is-Shes It is-Its We are-Were They are-Theyre3.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 ones knocking at the door2.正在进行着的动作可视为未完成的动作：Hes talking to his friends in the classroom.可用 still 一词强调动作的持续性Hes 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.Dont take that book away. Your fathers 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：Whats your brother doing these days? Hes 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.Its 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 Were 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： Hes 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 cant fall asleep late at night. 练习 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 cant 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. jumping B. running C. riding D takeing2. The children _ football.A. is playing B. are playing C. play the D. play a3. They _TV in the evening. They do their homework.A. are watching B. cant watching C. dont watch D. dont watching4. Listen! She_ in the classroom.A. is singingB. sing C .to sing D. is sing5. _are you eating? Im eating _ meat.A. What,some B. Which,any C. Where,not D. What,a6. Is she _ something?A. eat B. eating C. eatting D. eats7.My dictionary _,I have looked for it everywhere but still_ it.A. has lost,dont find B. is missing,dont findC. has lost,havent found D. is missing,havent found.8.Having a computer for personal use is no easy task because technology _ so rapidly.A. is changing B. has changed C. will have changedD. will change9. The building_ ,I cant stand the noise.A. was being built B. is built C. is being built D. builds10. I cant catch up with the fashion,because the clothes style_ all the time.A. has changed B. is changed C. is changing D. changed11. Its six in the afternoon. The Greens_ lunch together.A. has B. are having C. have hadD. had had12. Dont make any noise while the students_ to the class. A. are listening B. listened C. have listened D. had listened13. Jack and Ketty_ in the lake. Lets join them,shall we? A. swim B. have swum C. swamD. are swimming14. Look! The children_ basketball on the playground.A. plays B. played C. is playing D. are playing15. The kite_ high in the sky now. It looks like a big bird.A. has flown B. is flying C. was flying D. flew16.As we all know,the population in the world _ faster and faster.A. is grown B. is growing C. are grown D. are growing17. To my surprise,he_ in class.A. is always speaking B. would always speak C. has always been speaking D. does speak always18. I want to know when he _ for New York tomorrow. A. has left B. is leaving C. had left D. has been leaving19. He_ of how he can do more for the people.A. had always thought B. is always thinking C.has always been thought D. thinking always20. Forests _ and burned at such a speed that they will disappear from the earth in the future. A.cut B. are cut C. are being cut D. had been cut1. Are ,flying,I am 2. Are sitt