Unit3 Discovering Useful Structures現在完成時被動語態ppt課件 -新教材高中英語人教版（2019）必修第二冊 .pptx

1、Unit 3 The InternetDiscovering Useful Structures 被動語態復習被動語態復習一、什么是語態？一、什么是語態？語態是英語動詞的一種表現形式，用來說明語態是英語動詞的一種表現形式，用來說明_和和_之間的關系。之間的關系。二、語態的種類：二、語態的種類：_和和_主語主語謂語動詞謂語動詞主動主動被動被動挑事兒：挑事兒：If you think youre such a tough guy,then hit me.You hit me!Come and help me!I was hit/beaten.1.以上句子中所使用的時態和語態以上句子中所使用的時態和

2、語態是是 。2.現在完成時的被動語態的構為現在完成時的被動語態的構為：?，F在完成時的被動語態現在完成時的被動語態have/has been過去分詞過去分詞An enemy has been slained.一名敵人被擊殺。一名敵人被擊殺。An ally has been slained.我方隊友被擊殺。我方隊友被擊殺。You have been slained.你被擊殺了。你被擊殺了。Talk about something that has been done現在完成時的被動語態現在完成時的被動語態Read the pairs of sentences.Underline and compa

3、re the different verb forms.Jans life has been greatly improved by the Internet.Much has been written about the wonders of the World Wide Web.The Internet has greatly improved Jans life.People have written much about the wonders of the World Wide Web.The students have cleaned the classroom.The class

4、room has been cleaned.You neednt clean it now.現在完成時現在完成時activepassive表示說話時已經完成的被動性的動作或結果，主語是動作的承受者。表示說話時已經完成的被動性的動作或結果，主語是動作的承受者?，F在完成時的被動語態現在完成時的被動語態have/has+v-edhave/has+been+v-ed現在完成時現在完成時被動語態被動語態have/has been done現在完成時的被動語態現在完成時的被動語態be donehave/has doneHow do we form the present perfect passive v

5、oice?現在完成時的現在完成時的被動被動語態語態肯定形式：肯定形式：His homework has been finished.否定形式：否定形式：His homework has not been finished.一般疑問句一般疑問句:Has his homework been finished yet?特殊疑問句：特殊疑問句：How long has his homework been finished?主語主語+have/has been done.主語主語+have/has not been done.have/has+主語主語+been done.?疑問詞疑問詞+have/ha

6、s+主語主語+been done.?現在完成時的被動語態現在完成時的被動語態The letter (post)already.has been postedMany houses (build)for the poor so far.have been built用法用法1:被動動作發生在過去被動動作發生在過去,已經完成已經完成,對現在造成影響或產對現在造成影響或產生結果。生結果。(already,yet,recently,never,so far,by now,since等等)現在完成時的被動語態的用法現在完成時的被動語態的用法The machine (repair)for two hour

7、s but it still doesnt work.has been repairedPaper money (use)for over 50 years.has been used用法用法2:被動的動作或狀態從過去開始一直持續到現在被動的動作或狀態從過去開始一直持續到現在,并有可能繼并有可能繼續持續下去。續持續下去。(常與常與for+一段時間一段時間;since連用連用)Everyone will feel extremely delighted if he _(admit)to South China Normal University.You shouldnt leave school

8、 before your homework _(finish).has been admittedhas been finished用法用法3:在時間在時間/條件狀語從句中，表示可能還沒有發生的被動動作，條件狀語從句中，表示可能還沒有發生的被動動作，從句動作先于主句動作完成。從句動作先于主句動作完成。常常與與現在完成時連用的時間狀語現在完成時連用的時間狀語already 已經已經(肯定句肯定句)yet 已經（否定句或者疑問句）已經（否定句或者疑問句）recently/lately 最近最近 since then 從那時起從那時起ever since 自那以來自那以來 ever 曾經曾經so f

9、ar 迄今為止迄今為止 for a long time 很長一段時間很長一段時間by now/up to now 到現在為止到現在為止 in recent years 在最近幾年里在最近幾年里in/during/over the past/last years 在過去的幾年里在過去的幾年里never,twice,three times,many times(表示說話前發生過一次或多次的表示說話前發生過一次或多次的動作動作)現在完成時被動語態的解題步驟現在完成時被動語態的解題步驟1.找時找時：找與現在完成相對應的時間狀語：找與現在完成相對應的時間狀語；2.圈圈主主：主語與動詞構成被動關系：主語與

10、動詞構成被動關系；3.定定謂謂：確定謂動形式：確定謂動形式：have/has(not)been done。主動語態變被動語態的原則主動語態變被動語態的原則“三變三變”例：例：They are building nine parks.原句原句主語主語 by的的賓語賓語賓語賓語 主語主語 謂語謂語由主動由主動 被動被動“三不變三不變”原句原句意思意思不變不變 原句原句時態時態不變不變 原句原句主謂賓以外主謂賓以外成分不變成分不變Nine parks _ by them.are being built判斷正誤:*He has died for 3 years.（）*He died 3 years a

11、go.（）TF判斷正誤:*The patient has been taken good care.（）*The patient has been taken good care of.（）TF帶復合賓語的動詞變被動語態時,只能將賓語變為主語,原來的賓補保留不動,改成主語補足語。主動:I have asked her to help you.被動:She has been asked to help you.如give,send,bring,take,teach,show,tell,make,sing,write,read,sell,buy,pay,lend,pass,promise等，變為被

12、動語態時，一般將間接賓語變為被動語態的主語，若將直接賓語變為被動語態的主語時，間接賓語前面要用相應的介詞。主動主動:I have given him the key.被動被動:被動被動:判斷正誤:*Some of the best conversations have ever happened around the dinner table.（）*Some of the best conversations have been happened around the dinner table.（）TFChange the sentences into the present perfect

13、passive voice.Theyve built a kind of new PC with more functions.A kind of new PC with more functions has been built.n.功能；作用vi.起作用；運轉1.I have downloaded the software to help my phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?The software has been

14、downloaded to help my phone battery last longer.An identity card has been lost.Has the Wi-Fi password been confirmed?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?Thank you!