小学现在进行时 ppt课件.ppt

现在进行时,概念：表示正在进行或发生的动作结构：主语+be(am,is,are)+doing构成,The present continuous tense 现在进行时,基本用法1.表示现在正在进行的动作和发生的事eg:-What are you doing? -I am reading a book.2.有时表示现阶段正发生的事,但此刻动作不一定正在进行eg:He is teaching at the school. We are learning Unit5 these days.3.现在进行时的句子中常有now,或在句首常出现Look! Listen!等提示词eg:Listen! Danny is singing in the room. He is doing his homework now.,结构: be+doing ( be要根据主语作人称和数的变化)句型转换1.肯定句转换成否定句,要在 be 后加 not 构成eg:We are reading English now. We are not reading English now.2.陈述句转换成一般疑问句,把be动词提到句首eg:The student is drinking. Is the student drinking?3.陈述句转换成特殊疑问句,由“疑问词+一般疑问句”构成eg:He is working. What is he doing?,现在分词的构成1.直接加 ing eg:look looking2.如果动词末尾有不发音的e ,则去e加 -ing3.以动词闭音节结尾,且末尾只有一个辅音字母的,应双写此字母,再加 ing. eg:sit sitting,口诀教你学doing 进行时很好记,be加动词-ing; 直加双写去哑e,分词构成须仔细; 别说 be 无词义,主语和它最亲密; 变疑问 be 提前,否定 not 再 后添; 何时要用进行时 look,listen,now标志.,动词的现在分词的变化规则 1 一般的动词，直接在动词后加ing work - working sleep - sleeping study - studying 2 以不发音字母e结尾的动词，要先去e加ing take - taking make - making dance - dancing 但是see-seeing,3 重读闭音节的动词，要双写最后一个字母，再加ing 周六早晨游泳天气好 swim-swimming 小明早晨未起早 get-getting （up） 坐起忙把衣穿好 sit-sitting put (on)- putting,时间不早赶紧开始跑 begin - beginning run-running 忘带午饭又把商店找 forget -forgetting shop-shopping 停止剪发就逃跑 stop-stopping cut - cutting 4 以ie结尾的动词，把ie变为y再加ing lie - lying 平躺/说谎 tie - tying系，捆（鞋带，领带） die - dying死,