现在进行时。
一、概念。二、 现在分词的构成。
三、句型结构。
四．用法。五、练习。
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。
如： do-doing，read-reading，play-playing
2. 如果动词以不发音-e结尾，则去掉-e，再加-ing
如：come-coming， h**e-h**ing，make-******，ride-riding，write-writing，take-taking，use-using。
3. 末尾只有一个辅音字母的重读闭音节（即：辅音＋元音＋辅音）中，先双写末尾的辅音字母，再加-ing
如： hit-hitting，let-letting，put-putting，run-running，sit-sitting，swim-swimming，shop-shopping。
三、句型结构：
1)肯定形式：
主语+be(am/ is/are)+doing
i am singing.
he is running.
they are writing.
2)否定形式（be后加not）：
主语+be(am/ is/are)+not +doing
i am not singing.
he isn’t running.
they aren’t writing.
3）一般疑问句（be往前提）及回答：
be(am/ is/are)+主语+doing
am i singing? -yes, you are. /no, you aren’t.
is he running? -yes, he is. /no, he isn’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
what are you doing? -we are playing.
5) 与现在进行时连用的词：look(看)、listen(听)、now(现在)，look! he is swimming. 看！他正在游泳。
listen! she is singing. 听！她正在唱歌。
i am cleaning my room now. 现在我正在打扫房间。
四．用法：1.表示现在( 指说话人说话时) 正在发生的事情。
we are waiting for you.
2. 表示现阶段正发生的事情，但动作未必正在进行．
we are learning unit 5 these days.
he is teaching at the school.
3. 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, le**e 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.
五、练习 一。用现在进行时完成下列句子：
1. _youfly) a kite? yes,__
2. _yousit) in the boat?
3. _hetalk) with me?
4. weplay) football now.
5. what___youdo)?
6. ising) an english song.
7. what___hemend)?
8. hemend) a car.
9. these boysplay) tennis on the playground.
10. my mothercook) in the kitchen.
11. we can’t help you,because weh**e )classes.
12the boywrite) his homework?
13. look! these butterfliesfly) in the sky.
14. listen! the girlsing) in the next room.
15. the naughty boyswim) 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
dictionary __i h**e looked for it everywhere but still___it.
a. has lost,don’t find b. is missing,don’t find c.
has lost,h**en’t found d. is missing,h**en’t found.
8..h**ing a computer for personal use is no easy task because technology __so rapidly.
a. is changing b. has changed c. will h**e changed 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 h**ing c. h**e had d. had had
12. don’t make any noise while the students___to the class.
a. are listening b. listened c. h**e listened d. had listened
13. jack and ketty___in the lake. let’s join them,shall we?
a. swim b. h**e 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
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.
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