1. <rp id="zsypk"></rp>

      2. 現(xiàn)在完成時(shí)講解課件

        時(shí)間:2021-06-11 09:06:17 課件 我要投稿

        現(xiàn)在完成時(shí)講解課件

          同學(xué)們我們已經(jīng)學(xué)習(xí)了英語的現(xiàn)在進(jìn)行時(shí)、一般現(xiàn)在時(shí)、一般過去時(shí)、一般將來時(shí)這4種時(shí)態(tài)的用法,但這4種時(shí)態(tài)還不能滿足我們表達(dá)的需要。這時(shí),我們可以用一種新的時(shí)態(tài)——現(xiàn)在完成時(shí)表示。小編整理了關(guān)于英語現(xiàn)在完成時(shí)的課件,希望對大家有幫助!

        現(xiàn)在完成時(shí)講解課件

          英語現(xiàn)在完成時(shí):一、現(xiàn)在完成時(shí)的構(gòu)成

          (一)肯定式

          主語+助動(dòng)詞have /has +過去分詞+其它

          說明:這里的have /has是助動(dòng)詞,沒有什么具體意義。當(dāng)主語是第三人稱單數(shù)時(shí)助動(dòng)詞用has,其余人稱一律用have。 has,have的縮略式分別為's或've。規(guī)則動(dòng)詞過去分詞的構(gòu)成與過去式的構(gòu)成方式一樣,不規(guī)則動(dòng)詞可參看不規(guī)則動(dòng)詞表。實(shí)例:

          1)I've just copied all the new words .我剛抄寫了所有的生詞。 (表示不要再抄了)

          2)She has lost her books .她丟失了她的書。 (表示到目前為止還沒有找到)

          (如果用過去時(shí):She lost her books . 則強(qiáng)調(diào)書是過去丟的這一動(dòng)作,而不知現(xiàn)在有沒有找到)

          3)We've just cleaned the classroom .我們剛好打掃了教室。(表明現(xiàn)在教室是干凈的)

          (二)否定式

          主語+助動(dòng)詞have /has+not+過去分詞+其它

          說明:現(xiàn)在完成時(shí)構(gòu)成否定句時(shí),只需在助動(dòng)詞have /has后面加not就行。have not,has not的縮略式分別為haven't ,hasn't。另外,肯定句中有some,already時(shí),改為否定時(shí)要分別改成any,yet。實(shí)例:

          1)I haven't finished my homework yet.我還沒有完成我的作業(yè)。

          2)She hasn't travelled on a train .她沒有坐火車旅行過。

          3)We have never spoken to a foreigner.我們從來沒有和外國人說過話。

          注:有時(shí)not可以用never代替,表示“從來沒有”的意思。又如:

          4)I have never seen him before.以前我從來沒有見過他。

          (三)一般疑問式

          助動(dòng)詞Have /Has +主語+過去分詞+其它 ?

          說明:把陳述句中的have或has放到句首,句末打問號,同時(shí)把句中的some ,already改為any ,ye t就構(gòu)成了一般疑問句。肯定回答用“Yes ,主語+have/has.?否定回答用“No,主語+haven't/hasn't.”有時(shí)也可以用“No,not yet./No ,never./No,not even once.”等。實(shí)例:

          1)—Have you ever made dumplings ?你曾經(jīng)做過餃子嗎?

          —Yes ,I have .是的,我做過。

          2)—Has she ever been abroad ?她曾經(jīng)出過國嗎?

          —No,never.不,從來沒有。

          3)—Have they found the lost books yet ?他們已經(jīng)找到了丟失的書嗎?

          —Yes ,they have.是的,他們找到了。

          注意:當(dāng)句中有否定詞not ,hardly(幾乎不),never的時(shí)候,在改為反意疑問句時(shí),附加部分用肯定形式。例如:You have never come to our school ,have you ?你以前從來沒有來過我們學(xué)校,是嗎?

          英語現(xiàn)在完成時(shí):二、現(xiàn)在完成時(shí)的用法

          (一)現(xiàn)在完成時(shí)的用法1:表示過去發(fā)生或已經(jīng)完成的某一動(dòng)作對現(xiàn)在造成的影響或結(jié)果。此時(shí),常與時(shí)間副詞already(已經(jīng)) ,yet(還、已經(jīng)) ,just(剛剛、僅僅) ,ever(曾經(jīng)) ,never(從不) ,before(以前)等連用。這幾個(gè)副詞的用法如下:

          1.already意為“已經(jīng)”,通常用于肯定句中,可放在助動(dòng)詞之后,過去分詞之前,也可以放在句末。實(shí)例:

          1)I've already read this book. 我已經(jīng)讀過這本書了。

          (“讀”這一動(dòng)作發(fā)生在過去,對現(xiàn)在造成的.影響是“知道書中的內(nèi)容”。)

          2)I've washed my clothes already.我已經(jīng)洗了衣服。

          (洗衣服的動(dòng)作已完成,其結(jié)果是“衣服冼干凈了”。)

          注意:在表示吃驚或明知故問等感情色彩時(shí),already也可用于(口語)疑問句中。實(shí)例:

          3)Have you met him already ?你(真的)已經(jīng)見過他了?

          2.yet用在疑問句中意為“已經(jīng)”,用在否定句中意為“還”,常放在句末。實(shí)例:

          1)—Has he found his watch yet ?他已經(jīng)找到他的手表了嗎?

          —No,not yet.不,還沒有。

          2)The woman hasn't found her dog yet .

          那位婦女還沒有找到她的狗。(沒找到狗,心里著急,這就是對現(xiàn)在的影響)

          3.just意為“剛剛”,表示行為剛剛過去,常放在助動(dòng)詞與過去分詞之間。實(shí)例:

          He has just come back from school .他剛從學(xué)校回來。

          4.ever意為“曾經(jīng)”,用于疑問句或否定句中,放在助動(dòng)詞與過去分詞之間。實(shí)例:

          1)Have you ever been to Hong Kong ?你曾去過香港嗎?

          2)I haven't ever spoken to her.我未曾和她說過話。

          5.never意為“從來沒有”常與before連用(before要放在句尾,而never多放在助動(dòng)詞與過去分詞之間。實(shí)例:

          I have never travelled by plane before.我以前從來沒有乘飛機(jī)旅行過。

          6.before意為“以前”,指過去不確定的某個(gè)時(shí)間,總是放在句末,不受句型的限制。實(shí)例:

          1)Have you been to Hainan before ?你以前去過海南嗎?

          2)I haven't eaten Guangdong food before.我以前沒吃過廣東菜。

          (二)現(xiàn)在完成時(shí)用法二2——持續(xù)性用法(肯定句,疑問句中謂語動(dòng)詞必須是延續(xù)性動(dòng)詞):表示過去已經(jīng)開始,持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)。此時(shí)常與“for +一段時(shí)間?或“since+過去的點(diǎn)時(shí)間或從句(從句用一般過去時(shí))以及so far(到目前為止)等時(shí)間狀語連用。

          for + 段時(shí)間

          since +點(diǎn)時(shí)間

          實(shí)例:

          1)I've lived here since 1990.自從1990年以來我就住在這里。

          = I've lived here since 13 years ago.

          = I've lived here for 13 years.

          = It is 13 years since I began to live here.

          2)I haven't seen him for three years .我三年沒有看見他了。

          = I haven't seen him since three years ago

          = I haven't seen him since 2000.

          = It is 3 years since I saw him last time.

          3)Mr Wang has worked in the factory since he came to the city .

          自從到這個(gè)城市以來,王先生一直在這家工廠工作。

          4)She's been at this school since five years ago.

          自從五年前以來她就在這個(gè)學(xué)校。

          注意:①在這類句子的肯定句和疑問句中謂語動(dòng)詞必須用延續(xù)性動(dòng)詞。短暫性動(dòng)詞由于動(dòng)作不能持續(xù),故不能與for(達(dá)到;累計(jì))或since(自從。。。到現(xiàn)在)引出的時(shí)間狀語連用。

         、趯or和since引導(dǎo)的時(shí)間狀語提問要用How long

          1) 他入團(tuán)兩年了。

          誤:He has joined the League for two years.

          正:He has been a League member for two years.

          2)我買這輛自行車三年了。

          誤:I have bought this bike for three years.

          正:I have had this bike for three years.

          2) ▲部分短暫性動(dòng)詞與之對應(yīng)的延續(xù)性動(dòng)詞:

          短暫性動(dòng)詞 延續(xù)性動(dòng)詞

          die → be dead

          borrow → keep

          buy/catch → have

          get up → be up

          come → be in

          finish → be over

          leaver → be away

          open → be open

          close → be closed

          begin → be on

          become interested in → be interested in

          有人可能會(huì)問:一般過去時(shí)和現(xiàn)在完成時(shí)所表示的動(dòng)作都發(fā)生在過去,那么這兩種時(shí)態(tài)有什么區(qū)別呢?

          ☆答:①一般過去時(shí)與具體的表示過去時(shí)間狀語如:yesterday連用;強(qiáng)調(diào)動(dòng)作在過去發(fā)生,與現(xiàn)在無關(guān)。

          ②現(xiàn)在完成時(shí)與自已的特征詞連用,強(qiáng)調(diào)過去發(fā)生的動(dòng)作對現(xiàn)在的影響或過去開始發(fā)生一直持續(xù)到現(xiàn)在的動(dòng)作。

          例: He saw the film last night. (過去時(shí),表示他昨晚看過那部電影了,現(xiàn)在不知還要不要再看一次)

          He has (ever) seen the film before.(現(xiàn)在完成時(shí),表時(shí)他已看過那部電影,現(xiàn)在不想再看了)

          英語現(xiàn)在完成時(shí)鞏固練習(xí)

          I.按要求轉(zhuǎn)換下列各句,每空一詞。

          1、He has already finished his homework.(改為否定句)

          He _______ finished his homework ________.

          2.They have found the lost books already.(改為一般疑問句,并作否定回答)

          ______ they _______ the lost books _______?No,they________.

          3.Julia has not got home from school yet.(改為肯定句)

          Julia ______ _______ ________ home from school .

          4.You have never been to Shanghai before,_________ _________ ?(改為反意疑問句)

          5. He’s gone to Beijing, ______ ______?(改為反意疑問句)

          6.Mr Wang began to teach English in this school in 1999.(改為同義句)

          Mr Wang _________ _________ English in this school since 1999.

          7. He hasn’t left home for 3 days.(同義句)

          He _____ ______ ______ home for 3 days.

          8. They have lived here since 3 years ago. (對劃線提問)

          II.選擇正確答案。

          ( )1.—Who is Mary ?

          —____?I saw you talking with her at the meeting .

          A.Don't you meet her yet

          B.Didn't you met her yet

          C.Haven't you met her yet

          D.Hadn't you met her yet

          ( )2.—How do you like Beijing ,Mr Black?

          —Oh ,I ____ such a beautiful city .

          A.don't visit

          B.didn't visit

          C.haven't visited

          D.hadn't visited

          ( )3.The old people ____ lonely at all since we began to visit them once a week.

          A.don't feel

          B.hasn't felt

          C.haven't felt

          D.didn't feel

          ( ) 4.We have lived here ____ five years ago.

          A.when

          B.since

          C.before

          D.after

        【現(xiàn)在完成時(shí)講解課件】相關(guān)文章:

        現(xiàn)在完成時(shí)態(tài)課件04-23

        現(xiàn)在完成時(shí)課件03-18

        現(xiàn)在完成時(shí)復(fù)習(xí)課件04-24

        現(xiàn)在完成時(shí)的結(jié)構(gòu)課件06-11

        現(xiàn)在完成時(shí)趣味課件06-11

        英語現(xiàn)在完成時(shí)課件04-23

        現(xiàn)在完成時(shí)課件免費(fèi)04-23

        有關(guān)現(xiàn)在完成時(shí)的課件04-21

        現(xiàn)在完成時(shí)免費(fèi)課件04-12

        99热这里只有精品国产7_欧美色欲色综合色欲久久_中文字幕无码精品亚洲资源网久久_91热久久免费频精品无码
          1. <rp id="zsypk"></rp>