When,_while,_as_soon_as

When,while,assoonas的用法when和while的区别1.When的用法比较活，用在状语从句中，两边的时态可以相等.1)HewassingingwhenIwasreading.2)FatheriscookingwhenTomissleeping.3)PleasesayhellotoMikewhenyouseehim.when两边的时态也可以不等1)Katewasswimmingwhenherparentscameback.2)Theyweretryingtorunawaywhenthepolicemanbrokeintothehouse.3)Thelightwentoffwhentheyweretalking.while连接的句子，后面必须用进行时（现在/过去进行时）1)Acarhitherwhileshewasthinkingaboutaquestion.2)Thebooksfellofffromtheshelfwhiletheywerelisteningtotheradio.3)Whileweareplayingfootball,anoisecomesfromdownstairs.小结：用while和when填空，看看它们后面的句子的时态。如果是过去时，必须用when.如果是进行时，必须用while（没有while选项的时候用when)小结：在作“当…时候”时，when可以替换while.1)Marywashappywhile/whenshewasdoingherhomework.2)When/whiletheyarewateringflowers,astrangershoutatthem.While还有“然而”的意思。此时不能用when代替。1）Hehasagoodchancetobethefamousplayerwhilehewastedit.2)WecouldcometoseethefilmyesterdaywhileTomlostthetickets.用while和when填空1）Hewascopyingatext_______hisbrothercamein.2)Marylearntalot______shewasonly7.3)__________Iwasdrinking,fathercamein.4)Theyboughtmanyfood__________Mikewasstudying.5)__________thethiefwasstealingtheDVD,alotofpeoplecamein.6)______hefelldown,hecameupwithanidea.whenwhenWhile/whenwhile/whenWhile/whenWhenassoonas的用法•assoonas连接的时间状语从句中，指未发生的动作，规律是：主句一般将来时，从句用一般现在时代替一般将来时（主将从现）•Iwilltellhimthenewsassoonashecomesback。•Theywillbecrazyassoonastheyhearthenews•Assoonashegetshome,hewillnoticeyou.指紧接着发生的两个短动作，主从句都用一般过去时1)HetookouthisEnglishbooksassoonashesatdown2)Weatealotassoonaswegothome.3)Assoonasshecameoutofthehouse,sheworeabighat.小结：看assoonas的时态，要么两边都是过去时，要么就是主将从现填空1)He______(fly)toAmericaassoonashe______(be)free.2)We______(let)youknowassoonastheresult_______(come)out.3)They_______(do)moringexercisesassoonasthey_______(get)up.4)AssoonasMary______(turn)onTV,she________(begin)toeatsth.5)Bob_______(start)tocryassoonashe_____(see)hismother.willflyiswillletcomeswilldogetturnedbeganstartsaw