21小学英语语法：现在完成时.ppt

,语法专项课件（现在完成时1）,Part,语法透析,考点大观易错辨析通关训练,语法透视,考点大观,易错辨析,通关训练,现在完成时定义,现在完成时定义三要素：1.表示到现在为止已经完成或刚刚完成的动作。2.一件发生在过去的事情对现在产生影响。3.一个动作开始于过去，并持续到现在（也许还将持续下去）。We have known each other since 2005.我们从2005年认识的。I have lived in Wuhan for several years.我在武汉住了好几年了。,现在完成时结构,语法透视,考点大观,易错辨析,通关训练,肯定句：主语+have/has+过去分词+.,否定句:主语+havent(have not)+过去分词 主语+hasnt(has not)+过去分词.,疑问句:Have/Has+主语+过去分词.?,I havent finished my homework.我还没有完成作业。,Have you finished your homework?你完成作业了没？,I have finished my homework.我已经完成作业了。,现在完成时的用法,语法透视,考点大观,易错辨析,通关训练,1)表示到现在为止已经完成或刚刚完成的动作。Now we have planted all the trees.截止目前，我们种完了所有的树。He has just come back.他已经回来了。They have built many buildings in this city.他们在这个城市建成了好多建筑物。,现在完成时的用法,语法透视,考点大观,易错辨析,通关训练,2)表示过去发生的动作,强调结果或对现在的影响。Someone has broken the window.I have already lost the key.I havent read that book yet.I have just cleaned my hands.,(窗户现在是坏的),(我现在没有钥匙),(不了解书的内容),(手是干净的),现在完成时的用法,语法透视,考点大观,易错辨析,通关训练,3)表示从过去开始并持续到现在的动作或状态。She has learned English for 5 years.她学英语已经五年了。He has lived in Beijing since he was born.从他出生那天起就住在北京。Has he lived in Shenzhen for 4 years?他住在深圳四年了吗？,语法透视,考点大观,易错辨析,通关训练,过去分词的变化（规则）,(1)一般动词，在词尾直接加“ed”。work-worked-worked(2)以“e”结尾的动词，只在词尾加“d”。live-lived-lived(3)以“辅音字母+y”结尾的动词，将“y”变为“i”，再加“ed”。study-studied-studied(4)重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ed”。drop-dropped-dropped,语法透视,考点大观,易错辨析,通关训练,过去分词的变化（不规则）,A.过去分词与不规则动词的过去式形式一样havehadhad spend spentspent makemademadesaysaidsaid findfoundfound hearheardheard meetmetmetleaveleftleftflyfliedflied,语法透视,考点大观,易错辨析,通关训练,过去分词的变化（不规则）,B.过去分词与过去式形式不一样taketooktaken see saw seenspeak spokespoken singsangsung drivedrovedriven bewas/werebeen gowentgone,语法透视,考点大观,易错辨析,通关训练,过去分词的变化（不规则）,C.过去分词，过去式与动词原形一样cutcutcutput putput letletletreadreadread,语法透视,考点大观,易错辨析,通关训练,现在完成时的标志词1,标志词：already(已经),yet(已经),already:常用于肯定句中.yet:常用于否定句,疑问句尾.,I have already seen this film.我已经看过这部电影了。I havent seen this film yet.我还没有看这部电影。Have you seen this film yet?你看过这部电影了没？,语法透视,考点大观,易错辨析,通关训练,现在完成时的标志词2,since:(自以来)1)since+时间点Hehasstayedheresince5oclock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段He has kept the book for 2 weeks.,语法透视,考点大观,易错辨析,通关训练,辨析 have been to和 have gone to,have been to someplace.曾经去过某地，已经回来has gone to someplace.某人去了某地，还没有回来,My father has gone to Shanghai for a meeting.他（已经）去了上海。,My father has been to Shanghai for a meeting.他（曾经）去了上海。,语法透视,Next,考点大观,易错辨析,通关训练,Mr.Brown has had his TV _ 15 years.Ive taken driving lessons _last month.My sister has had her cell phone _a month.My friends havent visited me _my birthday.We havent used our car _ a long time.She hasnt had a good cup of coffee _years.Tom has worn glasses _he was 7 years old.,for,since,for,since,for,for,since,用for 或since填空,语法透视,考点大观,易错辨析,通关训练,用have/has been to,have/has gone to填空,1.Where is your brother?He _ the shop.Hell be back soon.2._ you ever _ to America?Yes,I _ New York twice.3.Here you are at last!Where _ you _?I _ London.4.David _Australia.Im sure hes already arrived.5.Is Benny here?No,he _ the school library.He left five minutes ago.,has gone to,Have been to,have been to,have been,have been to,has gone to,has gone to,Homework:,Finish exercise“现在完成时专项练习”。,