Grammar语法2020春A+单元指引Unit8一、宾语从句1.引导词①that引导“陈述句”，可省略IknowthatKateisgoodatswimming.=IknowKateisgoodatswimming.(宾语从句Kateisgoodatswimming为陈述句)②if&whether引导词“一般疑问句”，表示“是否”Heaskedmeif/whetherMissGaowasateacher.③下列情况只能用whether记忆口诀：前有介be狼，后有todo虎，位句首，加是否(ornot)i.前面有介词或be动词时Wearetalkingaboutwhetherhewillcomeback.Theproblemiswhetherhewantstohaveapicnicwithus.(表语从句)ii.后面有todo时Shecan’tdecidewhethertogoshopping.iii.位于句首时Whetherwewillgotheretomorrowdependsontheweather.(主语从句)iv.固定搭配whether…ornotJaneaskedmewhetherIlikewatchingTVornot.2.语序：从句部分要用“陈述语序”，即引导词后紧跟主语Doyouknowwhentheyaregoingtohavethemeeting.Idon’trememberwhereIputthebookyesterday.Couldyoutellmewhattheyaredoing?3.时态①主现从随便：主句是一般现在时，从句可以是任意时态IknowthatKateisgoodatswimming.(从句部分为“一般现在时”)Doyouknowwhentheyaregoingtohavethemeeting.(从句部分为“一般将来时”)Idon’trememberwhereIputthebookyesterday.(从句部分为“一般过去时”)Couldyoutellmewhattheyaredoing?(从句部分为“现在进行时”)注：Couldyoutellme中的Could为委婉语气，并不是一般过去时②主过从必过：主句是一般过去时，从句也要是某种过去时态HeaskedmeifMissGaowasateacher.(主句Heaskedme为一般过去时，从句ifMissGaowasateacher为过去)③真理永一现：客观真理永远用一般现在时，不受主语时态的影响Myfathertoldmethatthesunrisesintheeast.(主句Myfathertoldme是一般过去时，但从句thatthesunrisesintheeast是客观真理，所以仍用一般现在时)二、定语从句1.关系代词做主语①who先行词为人时，既可做主语，也可做宾语Thewomanwhoisthemostimportantinmylifeismymother.(先行词为thewoman；关系代词为who；who代替thewoman，在从句中做主语ThewomanwhoImetonmywaytoschoolisMary’saunt.(先行词为thewoman；关系代词为who；who代替thewoman，在从句中做宾语②whom先行词为人时，只能做宾语ThewomanwhomImetonmywaytoschoolisMary’saunt.(先行词为thewoman；关系代词为whom；whom代替thewoman，在从句中做宾语③which先行词为物，既可做主语，也可做宾语Hedidn’tcatchtheballwhi...
