语法知识点情态动词现在进行时（课件）-鲁科版（五四学制）英语四年级下册

四年级英语下册情态动词can的用法Hi,mynameisCan.情态动词cancan表示“能”、“会”，可以表达个人的能力没有人称和数的变化后面跟动词原形Icanwashsomeclothes.Shecanwashsomeclothes.Theycancook.Hecandosomekungfu.can的肯定句结构：主语+can+动词原形+其他。Shecan'tplaybasketball.Robincan'tcook.can't=cannotcan的否定句结构：主语+can't+动词原形+其他Canheplayfootball?Cansheplaythepipa?No,hecan't.Yes,shecan.can的一般疑问句结构：Can+主语+动词原形+其他？肯定回答：Yes,主语+can.否定回答：No,主语+can't.情态动词can的记忆口诀情动can表能力，和动原不分离。不管人称和数变，can的形式永不变。否定can后加not，一般疑问can提前。Practice按要求完成下列各题。1.Hecan_____(sweep)thefloor.(用所给词的正确形式填空.）sweep2.Icandosomekungfu.(变否定句）______________________________________Ican'tdoanykungfu.3.CanshesingEnglishsongs?(做肯定回答）____________________________________Yes,shecan.现在进行时doingWhatareyoudoing?询问某人正在做什么---What+be+主语+doing?---主语+be+doing.I’mcleaningmyhouse.Whatishedoing?

Heisrunning.Practice中LookandfillI’m

__________________.Sheis

_________________.

______________________wateringtheflowerscleaningthewindowWhatareyoudoing,Jenny?WhatisJennydoing?一般疑问句：---Be+主语+doing+其他？No,sheisn’t.Areyouwashingclothes?Isshewateringflowers?Yes,Iam.No,I’mnot.Yes,sheis.Practice中Lookandfill

______________________Yes,Iam.No,sheisn’t.Areyoucookingthemeal?Isshesweepthefloor?动词现在分词（V+ing)形式动词的现在分词构成口诀为：现在分词用途多，进行时态不可缺。它的构成很好记，动词后加-ing。词尾若有哑音e，去e再加没问题。一辅重读闭音节，最后字母要双写。还有一点要注意，改ie为y再加-ing。read—reading,write—writing,swim—swimming,die—dyingPracticedrink-_______come-___________run-_________listen-________write-____________swim-______________water-__________dance-____________skip