爱英语七下现在进行时课件.ppt

语法专题现在进行时 * 现在进行时 一、含义： 现在进行时表示现在（即说话人说话的时刻）正在进行的动作或正在发生的事情，现在进行时的标志性词语有now, look, at the moment, listen等 * 二、现在进行时基本结构 主语 + be动词 + 动词的现在分词 I am He / She We / You / They is are writing. speaking. running. 结构: be+doing ( be要根据主语作人称和数的变化) * 现在进行时 现在进行时的四种句式： 1.肯定句—主语+be+doing Eg: I am doing my homework. 2.否定句—主语+be+not+doing Eg: I am not doing my homework. 3.一般疑问句—be提到句首（注意人称变化） Eg: Are you doing your homework? 4.特殊疑问句：特殊疑问词+一般疑问句 Eg: What are you doing now? * 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? * 现在进行时 现在分词的构成规则： 1.一般在动词词尾加-ing，如：read-reading 2.以不发音e结尾，去e加-ing，如：write-writing 3.以重读闭音节结尾的动词，末尾只有一个辅音字母，应先双写这一字母，再加-ing。 Eg：swim-swimming run-running cut-cutting shop-shopping sit-sitting 特殊变化：lie-lying平躺，die-dying死亡 * 用现在进行时完成下列句子: 1. What ______ you ________(do)? 2. I____________ (sing) an English song. 3. What _____she ____________(drink)? 4. He___________ (drive) a car. 5. _____ you _______(fly) a kite? Yes, _______. 6. ____ she ________ (sit) in the boat? 7. ______you ________ (ask) questions? 8. We___________ (play) games now. are playing doing are am singing is drinking is driving Are flying I am Is sitting Are asking * Some exercises. 一、用现在进行时改写下列句子. 1.She sits under the tree. She is sitting under the tree. 2.I eat a hamburger and some fruit. I am eating a hamburger and some fruit. 3.They clean the classroom They are cleaning the classroom. * 1.The child __________the windows now.(open) 2.The boy _________ a picture now.(draw) 3.Look! She __________ a book.(read) 4.I ___________an e-mail to my pen pal now.(write) 5.You ________ your homework at home now.(do) 6.We ___________ at school now.(run) 7.They ____________ TV now.(watch) is opening is drawing is reading am writing are doing are running are watc