文档介绍：此刻进行时
1、定义： 表示此刻（说话瞬时）正在进行的动作。
2、使用状况：
（ 1）此刻（说话的瞬时）正在进行或发生的动作，重申 “此时此刻 ”。
. He is reading.
They are talking now.
（ 2）目前一段时间内的活动或现阶段正在进行的动作。
. He is teaching in a primary school.
They are working these days.
3、此刻进行时的基本构造及句型变化
1）构造：谓语动词构造： be(am, is, are)﹢doing（此刻分词）
2）此刻进行时的句型变化：
一定句 : 主语 +be+doing+其余 .
否认句：主语 +be+not+doing+其余 .(be 后加 not)
一般疑问句 : be＋主语＋ doing＋其余？（ be 动词提早）
一定回答 : Yes, 主语 +be.
否认回答 : No, 主语 +be+not.
Eg：一定句 He is watching TV now. Eg：一定句 We are working.
否认句 He is not watching TV now. 否认句 We are not working.
一般疑问句 Is he watching TV now? 一般疑问句 Are you working?
一定回答 Yes, he is. 一定回答 Yes, we are.
否认回答 No, he isn ’ t. 否认回答 No, we aren ’ t .
Eg：一定句 Tom and Mike are playing football right now.
否认句 Tom and Mike aren ’ t playing football right now.
一般疑问句 Are Tom and Mike playing football right now ？
一定回答 Yes, they are.
否认回答 No, they aren’t.
讲堂练****br/>句型变换
My parents are sleeping. 变(为一般疑问句 )
Sam is doing his homework right now. (变成否认句 )
Are you swimming? (变成一定句 )
3）动词 ing 变化规则
情 况 变 法 例 词
一般状况 直接加 -ing play--playing walk--walking
以不发音的字母
e 结尾的
去 e 加 -ing
come-coming
have-having
动词
make-making
ride-riding
write-writing take-taking