小学四年级现在进行时态讲解与练习.doc

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 the (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，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：Wearerunning 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：Wearentrunningnow.（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：Aretheyrunning now？（他们正在跑步吗？）回答：肯定Yes,theyare.否定:No,theyarent4.特殊疑问句式结构：疑问词+be+主语+其他？例如:Whataretheydoingnow?（他们正在做什么？）回答：Theyarerunning.（他们正在跑步）四、Be动词的人称对应：第一人称单数：Iam doing第二人称单数：Youare doing第三人称单数：Heisdoing、Lilyis doing、Mymumis doing.所有的复数人称：Weare doing、Theyare doing、Thepolicemanare doing五、朗读例句。1.Iamdoingmyhomeworknow.2.Iamemailingmyfriends.3.Iamrunninginthepark.4.Iamsinginginthemusicroom.5.Youaredoinghousework.6.YouarewatchingTV.7.YouarehavinganEnglishlesson.8.Youarehavingapicnic.9.Look!Mymotherisrunning.10.Heissleeping.11.Listen!Thegirlissingingwiththebird.12.NowJiaminisreadinganinterestingbook.13.Listen!Theyarereading.14.Look!Thechildrenarepainting.15.Theyarecookingmeals.16.Theteachersarehavinglunch.17.Areyoudoinghousework?18.AreyouwatchingTV?19.Isyourmumrunning?20.Ishesleeping?21.Aretheycooking?22.Aretheteachershavingdinner?23.Whataretheydoing?24.Whatishedoing?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,start,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. 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, Mary_(sing) there.四。选择题 1. Who _ over there now? A. singing B. are sing C. is singing 2. Its eight oclock. The students _ an English class.B. having C. is having D. are having3. Listen! The