英语现在进行时现在进行时的构成否定句一般疑问句特殊疑问句的变法现在分词的三种构成

英语现在进行时
现在进行时的构成
否定句
一般疑问句
特殊疑问句的变法
现在分词的三种构成

作谓语的动词用来表示动作（情况）发生时间的各种形式称为时态.
现在进行时表示1、现在（说话的瞬间）正在进行或发生的动作,强调“此时此刻”.E.g.He is reading .They are talking now.
2、当前一段时间内的活动或现阶段正在进行的动作.E.g.They are working these days.
3、 某些动词的现在进行时,表预定的计划或即将发生的动作.E.g I am coming.
其结构为be+现在分词.现在分词的变法有
1、一般在动词词尾加上-ing ,e..g.jump
2、以不发音字母e结尾的动词,先去e,再加-ing.E.g have write
3、.以重读闭音节末尾只有一个辅音字母结尾的词,它前面是单个元音字母时要先将词尾的辅音字母双写,再加上-ing.E.g.sit put
其句式变换都在be上做文章.
E.g.He is buying a bike.
Is he buying a bike?
He isn’t buying a bike.
一般由look,listen,now,at this moment等时间状语做标志.
尽管现在进行时比较简单,但在做题过程中也常会犯一些错误,常见的错误有如下几种：
专项训练：
一 、单选
1、 Look!He _____their mother do the housework.
A.is helping B.are help C.is help D.is helpping
2 、_____are the boys doing They are singing in the room.
A .Who B .How C.What D.Where
3、 Don’t talk here.My mother _____.
A.is sleeping B .are sleeping C.sleeping D .sleep
4 、Danny ______.Don’t call him.
A.is writeing B .is writing C.writing D .writes
5 、–When_____he_____back?
– Sorry,I don’t know.
A.does,come B.are coming C.is come D.is coming
答案：A C A B D
二 、填空
1、 It’s ten o’clock.My mother _____(lie)in bed.
2、 What____he _____(mend)?
3、 We _____(play)games now.
4、 What ____you____(do) these days?
5、 ____he ___(clean) the classroom?
6、 Who____(sing)in the next room?
7 、The girl____(like)wearing a sweater.Look!She ____(wear)a red sweater today.
答案：1 is lying 2 is mending 3 are playing 4 are doing
5 Is cleaning 6 is singing 7 likes ; is wearing
一 把动词变成现在分词形式易出错
例：1、They are swiming.(swim)
2 、Jenny is plaiing(play)football.
答案：1.swimming 2 .playing
解析：动词变现在分词可有如下口诀:“一添一去y不变”.“一添”指双写规则；“一去”指去掉不发音字母e规则；“y不变”指要与名词变复数区分开.
二 丢掉be动词或忘记把动词变成现在分词
例：1、 Look,two children flying.(fly) a kite in the park.
2 、Li Mingisn’t read ( not read) a book in bed now.
答案：1 are flying 2 isn’t reading
解析:现在进行时肯定句的结构规律为:“be+现在分词,缺一不可”.这一点必须牢记.
三 对动词或动词词组提问时丢掉doing
例：1 、The students are singing in the room.(对划线部分提问)
What are the students in the room?
答案：What are the students doing in the room?
解析:现在进行时态中对动作提问可记住此句式“What +be +主语+doing+其它?”
或简写为“What……doing……”?句式.
四现在进行时态的选择疑问句中易忽视or后用现在分词形式
例：孩子们在跑还是在跳?
Are the children running or jump?
答案：Are the children running or jumping?
解析:or连接的是两个并列成分,动词形式须一致.