八年级英语下册Unit6Anoldmantriedtomovethemountains第三课时Sec

第三课时SectionA(GrammarFocus～4c)单元语法精讲精练连词unless，assoonas，so…that…(一)unless引导条件状语从句，相当于if…not，在许多情况下二者可以互换。eg：Youwillfailintheexamunlessyouworkhard.如果你不努力学习，你就会考试不及格。【注意】①如果unless从句本身是否定式，则unless不能用if…not替换。②unless引导从句时，句子要遵循“主将从现”的原则。(二)assoonas…主要是用来引导时间状语从句，表示主从句的谓语动作同时发生或几乎同时发生。eg：I'llringyouupassoonasIarriveinBeijing.我一到北京就给你打电话。(三)so…that…意为“如此……以至于……”，其中so是副词，用来修饰形容词或副词。常见结构有：(1)so＋形容词/副词＋that…。eg：HespeakssofastthatIcan'tfollowhim.(2)so＋many/few＋复数可数名词＋that…。eg：IhavemadesomanymistakesthatIcan'tpasstheexam.(3)so＋much/little(少)＋不可数名词＋that…。eg：IhavesolittlemoneywithmethatIcan'tbuyanything.【拓展】在so…that…句型中，当主句的主语与that引导的从句的主语一致时，“so…that＋肯定句”句型可与“enoughto…”句型互换；“so…that＋否定句”句型可与“too…to…”句型互换。eg：HewassocleverthathecouldunderstandwhatIsaid.→HewascleverenoughtounderstandwhatIsaid.Thegirlissoyoungthatshecan'tdressherself.→Thegirlistooyoungtodressherself.一、单项选择。1．—HowisNancygettingonwithherlessons?—Shewon'tcatchupwithothers____shestudiesharder.(2015，海南)A．afterB．unlessC．assoonas2．Itis____abeautifulgarden______weliketoplayinit.(2015，宜宾)A．so，thatB．such，thatC．too，toD．very，that3．—WouldyoupleasegivethisnewlypublishednoveltoJack?—Certainly，____hecomesback.(2015，泰安)A．beforeB．assoonasC．untilD．unlessBBB4．Pandasarefacingdanger！Thesituationwon'tchange____humansstopkilling.(2015，南通)A．unlessB．thoughC．ifD．after5．Wewillgocampinginthemountains____itrainstomorrow.(2015，长春)A．unlessB．butC．orD．so6．Mysistergot____ateacherlastyear.A．marriedtoB．marrywithC．marrytoD．married7．Insummermilkwillquicklygobad____itisputintoafridge.(2014，杭州)A．thoughB．unlessC．becauseD．onceAAAB二、选用assoonas，unless，so…that…，before，but填空。8．I'llprobablystaywithmyfriends_______Igetmyownplacetolivein.9．—Anna，you'rewearinganewdresstoday!—Itfitsmewell，_____thecolorisnotmyfavorite.10．Hedressedsoquickly_____heputhisshoesonthewrongfeet.11．Yourdreamwon'tcometrue______youknowwhatyourdreamis.12．I'llgotovisitmyauntinEngland_________thesummerholidaysstart.13．Youwillneverknowwhatyoucando______youtry.beforebutthatunlessassoonasunless14．HowIwishIcouldsleeplonger！However，Ihadtogetup____________thealarmclockwentoff.15．—WillyouplaybasketballagainstClass3tomorrow?—Yes，_______itsnows.assoonasunless