《英语人教版八年级下册unit9 语法聚焦ppt课件.ppt》由会员分享，可在线阅读，更多相关《英语人教版八年级下册unit9 语法聚焦ppt课件.ppt（26页珍藏版）》请在三一办公上搜索。
1、Winter has already come，will it still be far in spring ?,冬天已经来了，春天还会远吗？,Present Perfect Tense 现在完成时,主语 + have/ has + 过去分词（pp）,助动词表示“有”,现在完成时的结构,Winter has already come，,will it still be far in spring ?,Mother: Dear son, clean your teeth please.,Son: Mum, I have already(已经) cleaned them.,Mother: Dear
2、, tell your father to have breakfast please.,Son: Mum, dad has had breakfast .,Father: Tell your mother to buy some milk, son.,Son: Oh, she has just(刚刚) bought some.,Mother: Dear , you must clean our house today?,Father: Honey, we have just(刚刚) cleaned our house.,主语 + have/ has + 过去分词（pp）,否定形式 haven
3、t ( have not ） +过去分词 hasnt ( has not ) +过去分词,疑问句 把助动词 have / has 放在句首,现在完成时的结构,注：主语若是第三人称单数助动词用 has,You have planted all the trees.I have planted all the trees.He/she has planted all the trees.They have planted all the trees.,区别have 和 has的用法,主语若是第三人称单数助动词用 has,1、规则变化（过去分词与过去时变化规则一样）,(1)、一般动词，在词尾直接加“
4、 ed ”。 work-worked-worked visit-visited-visited (2)、以“ e ”结尾的动词，只在词尾加“ d ”。 live-lived,过去分词,(3)、以“辅音字母 + y ”结尾的动词，将 “y” 变为 “i”， 再加“ ed ”。 ， study-studied-studied cry-cried-cried(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 ”。 stop-stopped-stopped drop-dropped-dropped,2、不规则变化（过去分词与不规则动词的过去式形式一样）,havehadhad
5、 spend spentspent makemademaden saysaidsaid findfoundfound hearheardheard,3、不规则变化（过去分词与过去式形式不一样）,taketooktaken speak spokespoken singsangsung drivedrovedriven bewas/werebeen gowentgone,4、不规则变化（过去分词，过去式与动词原形一样）,cutcutcutput putput letletletreadreadread,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 t
6、he trees.He has just come back. They have built many buildings in this city.,现在完成时的用法,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. (窗户现在是坏的)I have already lost the key. (我现在没有钥匙)I havent read that book yet . (不了解书的内容)I have just cleaned my hands. (手是干净的),常与already(已经), yet(已经), just(刚刚),e
7、ver(曾经)等词连用.,already: 常用于肯定句中. yet: 常用于否定句,疑问句尾.,3) 表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。 She has learned English for 5 years. He has lived in Beijing since he was born . Has he lived in Shenzhen for 4 years?,常与for, since引导的时间短语或从句连用.,for+ 时间段 since+时间点 , since+ 句子,注：并非所有for作为时间状语的句子都用现在完成时,I work
8、ed here for more than twenty years.(我现在已经不在这里工作了)I have worked here for more than twenty years.（现在我仍在这里工作）,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 week
9、s.,since , for 的用法:,用for 或since填空,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
10、_he was 7 years old.,for,since,for,since,for,for,since,注意: 瞬间动词不能和时间段连用.,method 1:,动作,die,be over,leave,borrow/buy,arrive,begin,end/finish,join,marry,keep/had,be away,be here,be on(上演）,be married,be in,be dead,他的爷爷已经去世2年了。 Nick 参军3年了. 他离开深圳好长时间了。 这本书我已借了4个月了.,His grandpa has been dead for 2 years.,N
11、ick has been in the army for 3 years.,He has been away from Shenzhen for a long time.,I have kept the book for 4 months.,method 2:,It is + 时间段 since + 一般过去时的句子.,他的爷爷已经去世2年了。 Nick 参军3年了. 他离开深圳好长时间了。 这本书我已借了4个月了.,It is 2 years since his grandpa died.,It is 3 years since Nick joined the army.,It is a l
12、ong time since he left Shenzhen.,It is 4 months since I borrowed the book .,辨析 have been to和 have gone to,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。,She has been to China . 她（曾经）去过中国。（人已经回来了）,have been to someplace. 曾经去过某地，已经回来has
13、gone to someplace.某人去了某地，还没有回来,She has gone to China last week.上周她去了上海 。（人可能回来了也可能没回来）,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,THE END,
