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副词性从句是什么?
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副词性从句
副词性从句也称为状语从句,主要用来修饰主句或者主句的谓语.大致分为九大类,分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式.
(1)时间状语从句e.g.Wheneveryoneisfullyawareoftheseverityoffreshwaterscarcityandtakeseffectivemeasures,Iamconvincedthatwewilltacklethisproblemconstructively.(当每个人充分意识到淡水短缺的严重性,并采取有效措施,我相信我们一定能妥善解决好这个问题.)
(2)地点状语从句e.g.Wherethereissmoke,thereisfire.(无风不起浪)(3)原因状语从句e.g.Petsshouldbeforbiddenbecausetheymayspreaddiseasesanddamagethecityscape.(应该禁止饲养宠物,因为它们可能会传播疾病和有损市容.)
(3)目的状语从句e.g.Oldpeopleshouldbeencouragedtoliveinanursinghousesothattheycanenjoyprofessionalcareandfirst-ratefacilities.(应当鼓励老人到敬老院居住,这样他们可以享受到专业的照料和一流的设施.)
(4)结果状语从句e.g.Somegovernmentofficialsfailtorecognizethepotentialhazardsofimproperwastedisposal,sothattheenvironmentinsomecitiesisdeteriorating.(一些政府官员未能认识到垃圾处理不当带来的潜在危害,因此一些城市的环境不断恶化.)
(5)条件状语从句e.g.IfwecontinuetooverlooktheincreasingwasteinGuangzhou,itislikelythatGuangzhouwillbecomeahugelandfillsitesoonerorlater.(如果我们继续无视广州日益增多的垃圾,有可能不久的将来广州将成为巨大的垃圾填埋场.)
(6)让步状语从句e.g.WhileIadmitthatsmokinghassomeside-effects,Istillfeelthatitisridiculoustobansmokinginpublicplaces.(虽然我承认吸烟有副作用,我依然觉得公共场所禁烟是荒唐的.)
(7)比较状语从句e.g.RedistwotimesasmuchasBlue.(红色是蓝色的两倍.)
(8)方式状语从句e.g.Justasweprotectlessablehumanbeings,soweshouldsafeguardthewelfareofotherweakerspecies.(正如我们保护弱者一样,我们也应该保护弱势物种的福利.)