初中英语语法—现在进行时讲解与习题现在进行时表示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 thesedays.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. jump2、以不发音字母e结尾的动词，先去e，再加-ing. E.g have write3、.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。
自我检测（一）、单选1、Look! He _____their mother do the housework.A. is helpingB. are helpC. is helpD.is helpping2 、_____are the boys doing ? They are singing in the room.A .WhoB .How C.What D.Where3、Don’t talk here. My mother _____.A. is sleeping B .are sleeping C. sleeping D .sleep4 、Danny ______. Don’t call him.A. is writeing B .is writing C.writing D .writes5 、–When_____he_____back?–Sorry, I don’t know.A. does,comeB.are comingC.is comeD.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 doing5 Is cleaning6 is singing7 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。
一般现在时的讲解与练习一般现在时是英语中应用最广泛的时态之一，是初中英语语法重点。
它表示1)经常性、习惯性的动作或存在的状态。
e.g. I go to school on foot. He is very busy now. 2)表示主语的特征、性格、能力、爱好等。
e.g. He can swim. I work hard. I like watching TV. 3)表示客观真理e.g. There are seven days in a week. The moon moves round the earth.其结构按正常语序，即“主语+谓语+其它”，有时为了起强调作用，时间状语也可提前.其句式变化可分为两种情况1)表示动作，一般人称作主语的，变否定句须在动词前加助动词don’t；变一般疑问句须在句首加助动词do。
E.g. They have lunch at 12:00. They don’t have lunch at 12:00. Do they have lunch at 12:00? 2）单三人称做主语的，变否定句须在动词前加助动词doesn’t；变一般疑问句须在句首加助动词does。
E.g. Jenny speaks English very well.Jenny doesn’t speak English very well.Does Jenny speak English very well?含有be动词的要在be上做变化.E.g. Danny is a good student.Danny isn’t a good student.Is Danny a good student?其时间状语为often、usually、always、sometimes等频率副词，on Saturdays、in the morning(afternoon evening) 、every day 等。
学生常见错误如下：一、be动词与行为动词同时出现在句子中例：We are plant (plant) the trees in spring.答案：plant解析：学生往往会用汉语的思维方式去翻译，就成了“我们是在春天植树”。
这是学习英语最忌讳的，要看语法是不是正确，在英语中，be是表状态，do是表动作，两种动词不能同时出现在句子中，可记住如下口诀：“英汉语言有差异，be 、do不能放一起，仔细琢磨细分析，语法千万要牢记。
”自我检测：(一)、单选1 Jenny ____ in an office. Her parents ____in a hospital.A work; worksB works; workC work; are workingD is working; work2 One of the boys_____ a black hat.A haveB there isC there areD has3 We will go shopping if it____ tomorrow.A don't rain Bdidn't rain Cdoesn't rain Disn't rain4 He said the sun ____in the east and ____in the west.A rose; setB rises; setsC rises, setD rise; sets5 Wang Mei ____ music and often ____ to music.A like; listenB likes; listensC like; are listeningD liking ; listen6 Jenny____ English every evening.A has studyB studiesC studyD studied答案：1 B 2D 3C 4B 5B 6B(二)、填空<1 I can take Li Ming there when he _____ ( come) to visit.2 _____your sister_____(know)English?3Her home____ _____ ______(远离)her school.4The pot_____(not look) like yours very much.5 Where _____you____(have)lunch every day?6 Who_____(想要)to go swimming?7 ______she_____(do) the housework every day?8 Jenny and Danny usually______(play) games in the afternoon .答案：1 comes 2 Does know 3 is away from 4 doesn't look二、单三人称形式易出错例：1 He plaies (play) football very well.2 Danny gos (go) to school at 7:10.答案：1 plays 2 goes解析：1以辅音字母加y结尾的动词变单三人称形式才能把y换成i再加es；2与名词变复数不同，变单三人称形式以o结尾的词要加es.三、在句式变换时易出错例：1 Does Jenny has (has) a good friend?2 Brian doesn’t lives (not live) in China.答案：1 Does have 2 doesn’t live解析：单三人称做主语的一般现在时做句式变化时，可记住如下口诀：“见助动，用原形”。