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现在进行时
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现在进行时 现在进行时（The PresentContinuous Tense）.
现在进行时的构成是:主语+be+动词ing〔现在分词〕形式
第一人称+am+doing+sth
第二人称+are+doing +sth
第三人称+is+doing+sth
现在进行时的定义：现在进行时表示现在或当前一般时间正在进行的动作.可以表示有计划的未来. 现在分词变化规则
1.直接+ ing
2.去e+ing
3.重读闭音节,且末尾只有1个辅音字母,双写辅音字母+ing
4.特殊变化：die-dying,lie-lying,tie-tying
5.不规则变化
现在进行时的基本用法：
A. 表示现在( 指说话人说话时) 正在发生的事情.
例：We are waiting for you.
B. 习惯进行：表示长期的或重复性的动作,说话时动作未必正在进行.
例：Mr. Green is writing another novel.
(说话时并未在写,只处于写作的状态.)
例：She is learning piano under Mr. Smith.
C.已经确定或安排好的将来活动
I'm leaving for a trek in Nepal next week.（已经安排了）
we're flying to Paris tomorrow.(票已经拿到了）
D.有些动词（状态动词不用于进行时态）
1.表示知道或了解的动词:believe,doubt,forget,imagine,know, remember,realize,suppose,understand
2.表示“看起来”“看上去"appear,resemble,seem
3表示喜爱或不喜爱hate,like.lover.prefer
4表示构成或来源的动词 be come from.contain,include
5表示感官的动词 hear see smell sound taste
6表示拥有的动词belong to.need.own .possess.want wish
【No. 1】现在进行时的构成
现在进行时由"be+v-ing"构成.be应为助动词,初学者最容易漏掉,它应与主语的人称和数保持一致.
【No. 2】现在进行时的应用
在实际运用时,现在进行时常用以下几种情况：
(1)当句子中有now时,常表示动作正在进行,这时要用现在进行时.如：
They are playing basketball now.现在他们正在打篮球.
(2)以look, listen开头的句子,提示我们动作正进行,这时要用现在进行时.如：
Listen!She is singing an English song.听,她正在唱英语歌.
(3)表示当前一段时间或现阶段正在进行的动作,且此时有this week, these days等时间状语,这时常用现在进行时.如：
We are making model planes these days.这些天我们在做飞机模型.
(4)描述图片中的人物的动作,也为了表达更生动.此时也常用现在进行时.如：
Look at the picture. The children are flying kites in the park.看这幅图,那些孩子正在公园放风筝.
【No. 3】现在进行时的变化
肯定句式：主语+be( am, is, are)+现在分词+其它.
否定句式：主语+be(am, is, are) +not +现在分词+其它.
一般疑问句：Be(am, is, are) +主语+现在分词+其它?
特殊疑问句：疑问词+be(am, is, are)+主语+现在分词+其它?
对现在进行时的特殊疑问句的回答,它不可以用Yes或No直接作答,要根据实际情况回答.
E. 表示渐变的动词有：get, grow, become, turn, run, go, begin等.
例：The leaves are turning red.
It's getting warmer and warmer.
F.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.
例：You are always changing your mind.
典型例题
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.
答案D. 前句是一个仍在持续的状态,应用进行时,由于没有找到,其影响仍然存在,应用完成时,瞬间动词用于否定式时可用于完成时.
e:现在进行时有时可以用来表示赞叹或厌烦的感情.例如:
He is always causing trouble.
他总是惹麻烦.
The Present Continuous Tense 现在进行时
现在进行时最容易出现错误的地方在动词的现在分词形式,我们在复习的时候要特别注意不规则动词的变化形式.
例如：
taking,taking是take的ing形式,以e结尾要去e加ing;
swimming,beginning,putting, shopping, stopping, hopping, travelling 要双写最后一个字母,之后加ing;
buying,playing,teaching,等大部分单词直接加ing.
有一些特殊变化(或者说以Ie为结尾的重读闭音节的动词)的现在分词〔有3个〕,:lying—lie, dying ―die tying―tie 这些以ie结尾要去e再把I变y再加ing．
现在进行时专练
一、用括号内所给动词的适当形式填空
1．Look！Tom and his parents ________（swim）in the river now．
2．It's only 7 o'clock，but Mary ________（sleep）in bed．She ________（not go）to bed so early every night．She is ill today．
3．—I ________（do）my homework．But my pen is broken．
—Don't ________（worry）．I'll ________（mend）it for you now．
4．—What are they doing now？
—They ________（put）on their clothes．
5．It's five o'clock．The students ________（play）football on the playground．
6．Listen！Jim's radio ________（make）a loud noise．Would you please tell him ________（turn）it down？
二、句型转换
1．He is at work now．（改为同义句）
He ________ ________ now．
2．They play basketball in the morning．（用now替换划线部分）
They ________ ________ basketball now．
3．The teacher is talking to my brother．（对划线部分提问）
________ is the teacher talking to？
________ ________ is the teacher talking？
4．Mr. Green is teaching us English．（对划线部分提问）
________ ________ Mr. Green ________？
5．The women are working near the house．（对划线部分提问）
________ ________ the women working？
6．Tom and his classmates are cleaning the windows．（同义句）
Tom ________ his classmates is cleaning the windows．
三、单项选择题
1．—What're the children doing？
—They ________．
A．are listening the radio B．are looking books
C．are watching TV D．seeing a film
2．There is a dog ________ in the yard（院子）now．
A．run B．running C．runs D．is running
3．We __any Chinese classes on Thursday．We ____an English class now．
A．aren't having；have B．don't have；have
C．don't have；are having D．aren't having；are having
4．The twins ________ red skirts today．They look fine．
A．are wearing B．are putting on C．are wear D．put on
5．One of the boys ________ standing by the lake．
A．are B．be C．is D．am
6．It's 12 o'clock．The Green family ________ lunch．
A．have B．has C．are having D．is having
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