1、1小学四年级上册现在进行时讲解及练习一、现在进行时的定义，构成，标志性词语定义：表示现在或现阶段正在进行或发生的动作或存在的状态。构成：主语+ be(am/is/are)+动词-ing 形式（现在分词） 构成标志性词语：1.现在进行时.通常用“now”. eg: I am doing my homework now.2.现在进行时.通常用“look”.eg: Look! My mother is running!3.现在进行时.通常用“listen”.eg: Listen! They are reading.4.现在进行时.通常用“at the (this) moment”。eg: At th
2、e (this) moment, he is only weeping.二、动词现在分词的构成规则:1 一般情况下直接加 ing think-thinking sleep-sleeping study-studying speak-speaking say-saying carry-carrying wake-waking 2 以不发音的字母 e 结尾的单词,去掉字母 e，再加 ing come-coming make-making leave-leaving have-having take-taking 3 以重读闭音节（重读闭音节即两个辅音中间夹一个元音并且重读的音节）结尾，呈现 “辅，
3、元，辅”结构的动词，双写末尾的辅音字母，再加 ing stop-stopping sit-sitting run-running forget-forgetting begin-beginning 三、现在进行时的句型变化1、肯定式结构：主语+be+动词-ing 形式+其他. 例如：We are running now. （我们正在跑步.） 2、否定式结构：主语+be+not+动词-ing 形式+其他. 例如：We arent runningnow.（我们不在跑步.）3、一般疑问句式结构：Be+主语+动词-ing 形式+其他？例如：Are they running now？（他们正在跑步吗？）
4、回答：肯定 Yes, they are. 否定:No, they arent 4.特殊疑问句式结构：疑问词+be+主语+其他？ 例如:What are they doing now?（他们正在做什么？）回答：They are running.（他们正在跑步）四、Be 动词的人称对应：第一人称单数：I am doing 第二人称单数：You are doing 第三人称单数：He is doing、Lily is doing、My mum is doing. 所有的复数人称：We are doing、They are doing、The policeman are doing 五、朗读例句。1.
5、I am doing my homework now. 2.I am emailing my friends. 3.I am running in the park. 4.I am singing in the music room. 25.You are doing housework. 6.You are watching TV. 7.You are having an English lesson. 8.You are having a picnic. 9.Look! My mother is running. 10.He is sleeping. 11.Listen! The girl
6、 is singing with the bird. 12.Now Jiamin is reading an interesting book. 13.Listen! They are reading. 14.Look! The children are painting. 15.They are cooking meals. 16.The teachers are having lunch. 17.Are you doing housework? 18.Are you watching TV? 19.Is your mum running? 20.Is he sleeping? 21.Are
7、 they cooking? 22.Are the teachers having dinner? 23.What are they doing? 24.What is he doing? 三、现在进行时的用法:（1）用来表示说话时正在进行或者发生的动作，例如：Mother is cooking in the kitchen.妈妈在厨房里煮饭。What are you looking at? 你在看什么？（2）用来表示现阶段正在进行的动作（但说话时不一定在进行），（3）用来表示即将发生的动作，一般是指按计划或者安排好要发生的动作。适用于这种情况的动词主要有：go,come,leave,star
8、t,arrive 等。例如:Im going home in half an hour.我一个半小时内要回家。 五、巩固练习一. 写出下列动词的现在分词形式work_sing_play_ study_have_dance_write_ take_ run_ sit_ shop_ swim_ 二.按要求改写句子 1. The boy is playing basketball. 否定句：_ 一般疑问句：_对“is playing basketball”提问：_2. They are singing in the classroom.否定句：_ 一般疑问句：_对“are singing”提问：_3
9、. 用现在进行时完成下列句子 1. What _ you _ (do)? I _ (sing) an English song.5. _ you _ (fly) a kite? Yes, _.8. We _ (play) games now.9. What are you _(do) now? I _(eat) bread.10. Its nine oclock. My father_(work) in the office.13. Where is Max? He_(run) on the grass.14. Listen, who_(sing) in the music room? Oh,
10、 Mary_(sing) there.四。选择题 1. Who _ over there now? A. singing B. are sing C. is singing 32. Its eight oclock. The students _ an English class. B. having C. is having D. are having3. Listen! The baby _ in the next room. A. crying 哭 C. is crying D. cries4. Look! The twins _ new sweaters.A. are wearing B. wearing C. are wear D. is wearing
