第20天 if引導條件狀語從句-每日一題之2017快樂暑假高一英語人教版 Word版含解析

第20天if引導條件狀語從句重要程度：★★★★★難易程度：★★★★★(2017·江蘇)____________notforthesupportoftheteachers,thestudentcouldnotovercomeherdifficulty.A.Itwere B.Wereit C.Itwas D.Wasit【參考答案】B【特別提醒】1.在虛擬語氣中，be動詞只能用were；虛擬條件句省去連詞if時，從句主謂部分倒裝：Were/Had/Should+主語+謂語動詞...e.g.WereITom,Iwouldrefuse.如果我是湯姆，我會拒絕。Iwillgo,shoulditbenecessary.假若有必要，我會去的。Haditnotbeenforthebadweatherwewouldhavearrivedintime.若不是天氣壞，我們就準時到達了。2.若條件從句為否定句，否定詞not應置于主語之后，而不能與were,should,had等縮略成weren’t,shouldn’t,hadn’t置于句首。1.用括號內(nèi)所給詞的正確形式填空=1\*GB3①Whatwillyoubuyifyou________(have)alotofmoney?=2\*GB3②Ifit________(notsnow)tomorrow,wewillfeelunhappy.=3\*GB3③Youmustn’tgotoschoolifyou________(be)stillinbed.=4\*GB3④Ifhe_______(be)athomeatthattime,hewouldknowit.=5\*GB3⑤Pleaseshowmethewayifyou________(know)it.=6\*GB3⑥Youwillhurtyourteethifyou________(eat)toomuchcandy.=7\*GB3⑦Ifyougivemeatoycar,I_________(be)veryhappy.2.(2017·北京)___________birdsusetheirfeathersforflight,someoftheirfeathersareforotherpurposes.A.Once B.If C.Although D.Because3.(2017·北京)Ifthenewsafetysystem__________touse,theaccidentwouldneverhavehappened.A.hadbeenput B.wereputC.shouldbeput D.wouldbeput4.Ifyouvisitourhomeandringthedoorbell,you__________byourdog.gkstkA.weregreeted B.willgreet1C.willbegreeted D.greeted1.①have ②doesn’tsnow③are ④were⑤know ⑥eat⑦willbe【拓展延伸】if引導的虛擬條件句：虛擬情況if從句的謂語動詞主句謂語動詞1.與現(xiàn)在事實相反動詞過去式（be一律用were）would/could/might/should+動詞原形2.與過去事實相反haddonewould/could/might/should+havedone3.與將來事實可能相反a.動詞過去式（be一律用were）b.should+動詞原形（不能用would）c.wereto+動詞原形would/could/might/should+動詞原形3.A【解析】句意：如果這個新的安全系統(tǒng)被投入使用的話，這個事故就不會發(fā)生了。根據(jù)主句確定是對過去情況的虛擬，所以從句謂語用haddone形式；此外根據(jù)句意可知是被動，用被動語態(tài)，故A項是正確的?！疽?guī)律總結】在if引導的條件狀語從句中，如果從句談論的是一個有可能發(fā)生的事實及其產(chǎn)生的相關的結果，主句用一般將來時態(tài)，從句用一般現(xiàn)在時態(tài)。除了if外，常見的這類詞還有assoonas"一……就"，unless"除非，如果不"，supposing"如果，假如"，provided"假如，除非"。if引導條件狀語從句的用法，你掌握了嗎？__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________