小学阶段现在进行时的结构和用法
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-thinking
2. 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: for’get-forgetting,pre’fer-preferring,up’set-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’s
  It is---It’s We are---We’re They are---They’re
3.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．
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 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. jumping 　B. running 　C. riding 　D takeing
2. The children _____ football.
　A. is playing 　B. are playing 　C. play the 　D. play a
3. They ______TV in the evening. They do their homework.
　A. are watching　 B. can’t watching　 C. don’t watch 　D. don’t watching
4. Listen! She____ in the classroom.
　A. is singing　B. sing 　C .to sing 　D. is sing
5. ______are you eating? I’m eating ______ meat.
　A. What,some　 B. Which,any　 C. Where,not　 D. What,a
6. Is she ____ something?
　A. eat　 B. eating　 C. eatting　 D. eats
7.My dictionary ___,I have looked for it everywhere but still___ it.
　A. has lost,don’t find　 B. is missing,don’t find　C. has lost,haven’t found 　D. is missing,haven’t 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 changedjoin的四种用法　D. will change
9. The building_______ ,I can’t stand the noise.
　A. was being built 　B. is built 　C. is being built 　D. builds
10. I can’t catch up with the fashion,because the clothes style_______ all the time.
　A. has changed 　B. is changed　 C. is changing 　D. changed
11. It’s six in the afternoon. The Greens_______ lunch together.
　A. has　 B. are having 　C. have had　D. had had
12. Don’t make any noise while the students_______ to the class.
　A. are listening　 B. listened 　C. have listened 　D. had listened
13. Jack and Ketty_______ in the lake. Let’s join them,shall we?
　A. swim　 B. have swum　 C. swam　D. are swimming
14. Look! The children_______ basketball on the playground.
　A. plays 　B. played 　C. is playing 　D. are playing
15. The kite_______ high in the sky now. It looks like a big bird.
　A. has flown　 B. is flying 　C. was flying　 D. flew
16.As we all know,the population in the world _______ faster and faster.
　A. is grown 　B. is growing 　C. are grown 　D. are growing
17. To my surprise,he_______ in class.
　A. is always speaking 　B. would always speak 　C. has always been speaking 　D. does speak always
18. I want to know when he _______ for New York tomorrow.

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。