初中八年級(jí)英語課件時(shí)間狀語從句中when和while的區(qū)別

2020年自治區(qū)教科院中小學(xué)教師微課制作評(píng)比課題：時(shí)間狀語從句中when和while的區(qū)別科目：英語年級(jí)：八年級(jí)主講人：李鑫時(shí)間狀語從句中when和while的區(qū)別難點(diǎn)名稱：能正確使用連詞when和while,明確兩者引導(dǎo)時(shí)間狀語從句的相同及不同點(diǎn)巴音郭楞蒙古自治州石油第一中學(xué)李鑫2020年8月八年級(jí)-下冊(cè)-Unit5Whatwereyoudoingwhentherainstormcame?01.lead-in03.practice02.presentation04.summaryLead-inwhen和while有什么區(qū)別呢？延續(xù)性動(dòng)詞非延續(xù)性動(dòng)詞presentation延續(xù)性動(dòng)詞，也叫作持續(xù)性動(dòng)詞，表示能夠延續(xù)的動(dòng)作，這種動(dòng)作發(fā)生后可以一直持續(xù)下去。非延續(xù)性動(dòng)詞，也叫作終止性動(dòng)詞、瞬間性或短暫性動(dòng)詞，表示不能延續(xù)的動(dòng)作，即動(dòng)作從發(fā)生到結(jié)束所持續(xù)的時(shí)間非常短，且大多都是動(dòng)作發(fā)生后也就馬上結(jié)束。presentationIlearnedEnglishthreeyearsago.Shegetstoschoolbybuseverymorning.這兩個(gè)句子的謂語動(dòng)詞是延續(xù)性，還是非延續(xù)性動(dòng)詞呢？presentation延續(xù)性動(dòng)詞非延續(xù)性動(dòng)詞learn,work,stand,study,know,walk,keep,have,sing,read等open,die,finish,begin,come,leave,move,go,buy等Sheborrowedthisbookfromthelibrary.IlearnedEnglishthreeyearsago.presentation都表示“當(dāng)……”，但區(qū)別是什么？when和while引導(dǎo)時(shí)間狀語從句presentationItwasrainingwhenshearrivedatthestation.Whenyouworked,Iwassleeping.非延續(xù)性動(dòng)詞延續(xù)性動(dòng)詞when延續(xù)性動(dòng)詞/非延續(xù)性動(dòng)詞時(shí)間段/時(shí)間點(diǎn)時(shí)間點(diǎn)時(shí)間段presentation從句中動(dòng)作既可以與主句的動(dòng)作同時(shí)發(fā)生，又可以在主句動(dòng)作之前或之后發(fā)生。whileIwasdoinghomeworkwhilemyfatherwaswatchingTV.Don’tmakeanynoisewhileothersarereading.當(dāng)我做作業(yè)的時(shí)候父親正在看電視。不要制造噪音當(dāng)別人看書時(shí)。非延續(xù)性動(dòng)詞時(shí)間段/延續(xù)性動(dòng)詞/時(shí)間點(diǎn)presentationpractice用when或while填空1._______weweretalkingintheclassroom,theteachercamein.2._______theygottotheairport,itwasraining.3._______shewasreadingabook,thephonerang.4._______Isawtheboy,hewaswearinganewcoat.5.Wereyoudrawing

theteacherwastalking?When/WhileWhenWhen/WhileWhileWhen延續(xù)性動(dòng)詞非延續(xù)性動(dòng)詞延續(xù)性動(dòng)詞非延續(xù)性動(dòng)詞強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)發(fā)生when和while引導(dǎo)時(shí)間狀語從句相同點(diǎn)不同點(diǎn)當(dāng)從句中的動(dòng)作為時(shí)間段，且從句動(dòng)作為延續(xù)性動(dòng)詞時(shí)，when和while都可以使用When引導(dǎo)的時(shí)間狀語從句，從句中的動(dòng)詞可以是延續(xù)性動(dòng)詞也可以是非延續(xù)性動(dòng)詞。但是while從句中的動(dòng)詞必須是延續(xù)性動(dòng)詞。且while常強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)發(fā)生，用進(jìn)行時(shí)。WhenIwastakingawalkinthepark,Imethim.when和while可以互換Itwasrainingheavilywhenwearrived.只能用when,