Unit2WildlifeProtectionDiscoveringUsefulStructures课件-人教版高中英语.pptx

Unit2DiscoveringUsefulStructuresThePresentContinuousPassiveVoice

Whataretheydoinginthepicture?Thepolarbear.Thepandabamboo.Theelephantsports.isswimmingisdoingiseating现在进行时的构成:_______________________________________________be(am/is/are)doing

动词现在分词(V-ing)构成规则:1.drink-drinking;eat-eating;listen-listening2.write-writing;make-making;ride-riding3.sit-sitting;swim-swimming;put-putting;play-playing；draw-drawing；box-boxing一般在动词原型后加ing.以不发音e结尾的动词，去掉e再加ing.字母、音标以“辅+元+辅”（字母y、w、x除外）结尾且重读的动词，双写末尾的辅音字母再加ing.4.特殊变化：lie—lying；die—dying；tie—tying

Thewhales__________(kill)byhumanbeings.werekilledTherhino/?ra?n??/____________(hunt)bysomeone.washuntedReview:thepassivevoice被动语态的基本构成:_________________be+V.ed(过去分词)

（时态和语态结合，先体现时态，后体现语态）现在进行时：am/is/are+V-ing被动语态：be+done(V过去分词)现在进行时的被动语态：主语+am/is/are+being+done+(by…)表进行表被动现在进行时的被动语态结构

1.Theplan___________________thismonth.计划本月正在执行。2.Yourcomputer__________________now.现在没人修理你的电脑。3.___thesefields_______________thisweek？这周有人在给这些地浇水吗？4.Where___you______________________now？现在你们在哪里接受面试？isbeingcarriedoutisnotbeingrepairedArebeingwateredarebeinginterviewed肯定形式：am/is/are＋being＋过去分词否定形式:am/is/are＋not＋being＋过去分词疑问形式:Am/Is/Are＋主语＋being＋过去分词？特殊疑问句的形式:把特殊疑问词放在一般疑问句前面。现在进行时的被动语态的构成

Basicusage基本用法1.表示说话时正在进行的被动动作，句中常用now,rightnow,look,atpresent,atthemoment等时间状语连用。He(examine)bythedoctornow.Look!Thechildren(care)ofbytheiraunt.看!孩子们正由他们姑妈照顾。她现在正在接受医生的检查。isbeingexaminedarebeingcared

2.表示现阶段正在进行的被动动作(说话时不一定在进行),句中常用atpresent,thesedays等时间状语。Theproblemoffoodsafety_______________(study)byscientiststhesedays.isbeingstudied

3.表示一种习惯的被动行为(often,always,frequently,constantly),带有赞扬、羡慕、抱怨，讨厌等感情色彩。Childrenofourneighbors___alw