文档介绍：The Present Continuous Tense 现在进行时
What is the boy doing?
He is running.
What is the man doing?
He is sleeping.
What are they doing?
They are singing.
The Present Continuous Tense (现在进行时态)
定义:现在进行时态表示现在正在进行或发生的某种事情及动作。
构成:“主语+be (am, is, are )+v- ing
v-ing是动词的现在分词形式,动词be根据主语人称进行变化。
标志:当句中出现Look/Listen/now或有上下文提示时用现在进行时。
请仔细观察下面几个进行时态的句子,并总结出动词变为现在分词的规则.
’m doing my homework now.
! He is playing the piano.
are dancing in the room.
am writing some words.
is running.
is swimming.
动词现在分词的变化规律
1) 一般情况下,在动词原形后直接加-ing. 如:
work—working(工作) do—doing(做) play—playing(玩)
2) 以不发音的字母e结尾的动词,去掉e,再加-ing. 如:
dance—dancing(跳舞) ing(来)
(但动词词尾是字母组合ee的,就不能去掉词尾e,而应直接加- ing。例如:  see-seeing)
3) 重读闭音节单词,如果末尾只有一个辅音字母,则双写这一字母,再加-ing. 如:
get—getting(得到) shop—shopping(购物)
run—running(跑) swim—swimming (游泳)
现在进行时的句式
: 主语+be(am/is/are)+V-ing+其他
如:I am reading a book.
:直接在am/is/are后加not
如:I am writing.
I am not writing.
:问句,直接把am/is/are提句首,若原句有第一人称,把第一人称变为第二人称。
肯定回答:Yes, 主语+be动词
否定回答:No, 主语+be动词+not
如:You are drawing a pig.(变为一般疑问句,并做肯定回答和否定回答)
---Are you drawing a pig?
---Yes, I am./No, I'm not.
:对be V-ing提问要用what
格式为:What+am/is/are+主语+V-ing?