比较状语从句ppt课件

.,DegreesofComparison,比较状语从句,.,比较状语从句是表示比较、比例、类比等的句子。其主要句子结构如下：,.,a.主语+谓语+as+形容词/副词+as+被比对象,.,这个句型叫等比句结构，表示两个人和事物在性质、特征等方面相似或相等，即相等的比较。被比对象可能是从句中的主语，也可能是宾语或其他成分。两个as，作用不同，前一个as是副词，在主句中说明所比较内容的程度，后一个as是连词，含有“比”、“如同”的意思，它所引导的从句通常是省略形式。,.,Physicsisasimportantasmathematics(is).Youseemtoknowmusicaswellasyouknowastronomy.天文学Takeasmuchasyouwant.Isitasdifficultastheysayitis?Wehaveaccomplished达到（目的)asmuchinthepastthreeyearsaswouldhavetakentenyearsinthepast.,.,表示两个人或事物在性质、特征等方面的不相似或不相同时，就用“主语+谓语+notso/as+形容词/副词+(名词)+as+被比对象”这个句型。,.,Youarenotsooldasyoulook.Therewasnogardensolovelyashisinthiscity.Itisntascoldasitwasyesterday.Nopersoniseithersohappyorsounhappyasheimagines.Finallyhehasmadeasmuchmoneyashewanted.,.,有时as好象是从句的主语，其实是从句的主语省略了。,.,Therewerenotsomanyticketsavailableaswereaskedfor.Youseemedtounderstandhumannatureaswellasdoscience.,.,比较句的肯定形式还有thesameas,suchas；否定形式还有notthesameas,notsuchas。,.,Yournameisthesameasyourfathers.Herdresswasthesamecolorasmine.Yourwatchisnotthesameashis.Inevermetsuchamanasyouryoungerbrother.,.,b.主语+谓语+形容词/副词比较级+than+被比对象,.,在这种结构中，than是个连词，引导比较状语从句，如果被比较的对象为名词或代词，一般采用省略形式，省去与主句中相同的部分。,.,Thisriverislongerthanthatone.Heisyoungerthanshe.LessonOneismoreinterestingthanLessonTwo.Shestudiesmorediligently勤奋地thanherclassmates.,.,Hedrivesfasterandmoredangerouslythanyou.ThistestislesssimplethanIexpectedittobe.Lightdoesnottravelatthesamespeedthroughallmaterials物质;itgoesslowerthroughsomethanthroughothers.,.,有时，连词than后直接跟从句的谓语，这时我们可以把它看成是省略了某些词语。,.,在这种结构中，有时比较对象需要根据上下文内容进行判断；有时对象含蓄在主句中，这时后面往往是一个表示时间或条件的修饰语。,.,Thereweremorecasualties受害者thanwasreported.(=thanitwasreportedtherewere)Sheplayedthepianomuchbetterthancouldhavebeenexpected.,.,Takingthismedicinehelpstorelieve缓解hisheadache,andmakeshimlessill-tempered脾气暴躁thanbefore.,.,than引导的从句有时可放句首。Thanhenoonecouldshowafriendlierattitude态度toyou.,.,在一定上下文中，从句还可以省略。Yououghttocomehereearlier.,.,c.主语+谓语+形容词/副词最高级+（名词）+范围,.,在这个句子结构中，形容词最高级的前面要加定冠词the。副词最高级的前面可加the可不加。形容词最高级后面可跟名词，而副词后面却不能跟名词，它只能修饰动词。比较范围一般是短语或从句。,.,ThiscoatisthemostexpensivethatIveeverbought.Sheisthemostactivegirlinourclass.Heworkedhardestintheworkshop.Sheboughttheleastexpensivetowelsthatshecouldfind.,.,最高级还可以用下列结构表示：,.,否定词语+比较级Ihaveneverseenatallerbuilding.Nootherbookhashadagreaterinfluenceonmylife.,.,否定词语+so+形容词/副词+as+比较对象ThereisnothingIlikesomuchastravelingabroad.Hehasneverbeensohappyasheistoday.,.,morethananyotherSheismorebeautifulthananyothergirlintheschool.Thisteacherexplained解释theproblemmoreclearlythananyotherteacher.,.,asasanyHerunsasfastasanyotherstudentintheclass.Thisriverisaslongasanyotherintheworld.,.,d.the+比较级，the+比较级,.,这是表示比例的句型，意思是“越，就越”。后面跟的是形容词或副词的比较级。通常，前面为条件从句，后面为结果主句。,.,Themoreticketsyousell,themoremoneyyouwillget.Thesmallerthecomputeris,thefasteritcanwork.Themorehethought,theangrierhegrew.,.,有时主句在前，从句在后：Anobjectdrawstheharder,themorematteritcontains.(物体含有的物质越多，它的引力就越大。)Otherswillsuspect怀疑usthemore,themorewesuspectthem.别人怀疑我们越多我们怀疑他们也越多,.,这种句型常用省略句。Themore,thebetter.Thesooner,theworse.Thesmallerthemind,thegreatertheconceit.,.,主句的主谓有时半倒装，以保持句子的平衡。Themoreyouread,thebetterwillyouwrite.Thesmallertheparticles(分子)are,themorefreelydotheymove.,.,e.类比句，表示两类事物的相同或相似关系，通常用连词或引导从句。其主要句型结构有：,.,1.AistoBwhat/asCistoD.Readingistothemindwhatexerciseistothebody.读书对于思想,好比运动对于身体一样.Manureistocropsasfoodistoman.肥料对于庄稼正如食物对于人们那样重要。,.,2.AdoesforBwhatCdoesforD.Leavesdoforplantswhatlungsdoforanimals.叶子对植物的作用犹如肺对动物的作用。,.,3.AisthattoBwhichCi