1时间状语从句条件状语从句词条含义用法例句if从句+祈使句如果......,就......(指能够发生或可能发生的事件)1.位置可在主句前也可在主句后；2.表建议Ifyouwanttogo,pleasetellme.Ifyoudon’tfeelwell,pleasegotoseethedoctor.if如果（表假设）1.从句表示某种假设，主句表示此种情况所导致的结果。2.“主将从现”；Shemaycomewithusifshearrivesintimes.Ifhedoesn’tworkhard,hewillfailhisexam.ZXY词条含义用法例句when当......时候1.其引导的从句的时间状语既可以是“时间点”也可以是“时间段”；2.从句的动词既可以是短暂性动词也可以是延续性动词；3.“主将从现”I’mgoingtobeateacherwhenIgrowup.Becarefulwhenyoucrosstheroad.while当......时候;和......同时1.引导的从句的时间状语只可是“时间段”；2.从句的动词只可是延续性动词或表状态的词；3.从句中持续性词常用进行时态ImetAnnewhileIwastakingawalkinthepark.WhilehewaswatchingTV,hefellasleep.assoonas一......就......1.主句与从句的动作几乎同时发生；2.“主将从现”Pleasecallmeassoonashecomesback.before/after在......之前/后1.在before和after引导的时间状语从句“主将从现”2.after引导先后发生的两个动作时，这两个动作都可以用一般过去时HewillcometoseeyoubeforeheleavesBeijing.AfterIcamebackhewenttothefactory.until直到......1.肯定句中，谓语动词必须是延续性动词；2.否定句中，谓语动词既可是延续性动词也可是非延续动词。HewillwaituntilIarrive.Thegirldidn’tgotothebeduntilshefinishedherhomeworkbyherself.since自从表示从起点到现在的时间段，主句一般用完成时态。Shehaslivedalonesinceherhusbanddiedfiveyearsago.2because,sothat,so,so...that,though/although引导的状语从句词条/含义引导的从句类型用法例句because因为；由于原因状语从句1.表示必然的因果关系，语气较强，通常放在主句之后，若强调原因则放在主句之前；2.常用来回答why的提问；3.不和so在同一个句子中使用.4.和becauseof+短语/名词/代词可以互换，because+句子；--Whyareyouworried?--Becausemybikeisbroken.Wecan’tgotothepartybecauseoftherain.=Wecan’tgototopartybecauseit’sraining.sothat以便；为了；目的是目的状语从句1.sothat引导的目的状语从句中通常有can,could,may,might,should等情态动词；2.在主句之后，从句前不用逗号，有时可省略thatTheyworkedveryhardsothattheycouldfinishtheworkbeforesupper.Hegotupearlysothathecouldcatchtheearlybus.so因此；所以结果状语从句1.so常用来连接并列句，前一分句表示原因，so后的分句表示结果；2.so和because不能同时出现在一个句子中。It’sverycold,soIwroteaheavycoat.=Becauseit’sverycold,Iworeaheavycoat.so...that如此......以至于结果状语从句1.so+adj/adv.;that+结果状语从句；2.that+肯定句时可以与enoughto...互换；that+否定句可以与too...to互换。MissGaoaskedaquestion.Itwassoeasythateverybodycouldanswerit.=MissGaoaskedaquestion.Itwaseasyenoughforeverybodytoanswerit.Thegirlissoyoungthatshecan’tdresshimself.=Thegirlistooyoungtodressherself.although/though虽然；然而让步状语从句1.although比though更正式；2.不能与but连用，但可以与yet或still连用。Heisverybusy,butheisveryhappy.=Althoughheisverybusy,heisveryhappy.ZXY
