2017版高考一轮复习课件：选修7 unit21《Human Biology》（北师大版）
<p> 【联想·积累】</p><p> “<span word="sb">sb</span>/<span word="sth">sth</span> <span word="is">is</span>/<span word="was">was</span> <span word="believed">believed</span>＋<span word="to">to</span> <span word="be">be</span>/<span word="do">do</span>”用法小结 (1) “<span word="sb">sb</span>/<span word="sth">sth</span> <span word="is">is</span>/<span word="was">was</span> <span word="believed">believed</span>＋<span word="to">to</span> <span word="be">be</span>/<span word="do">do</span>”为固定结构，意为“人们认为(相信)……，被认为是/做……”，其中的不定式作主语补足语。常用于这种句型的动词有<span word="say">say</span>/<span word="hope">hope</span>/<span word="think">think</span>/<span word="report">report</span>/<span word="know">know</span>等。动词用被动语态，其主语为指人或物的名词，意为“据说/希望/认为/报道/众所周知……”。 (2)当动作发生在谓语动词动作之前时，不定式用完成式；强调动作正在进行时，不定式用进行式。</p><p> (3)<span word="sb">sb</span>/<span word="sth">sth</span> <span word="be">be</span> <span word="believed">believed</span>/<span word="said">said</span>/<span word="thought">thought</span>/<span word="reported">reported</span>...<span word="to">to</span> <span word="be">be</span>/<span word="do">do</span>...句型可转化为<span word="People">People</span> <span word="believe">believe</span>/<span word="say">say</span>/<span word="think">think</span>/<span word="report">report</span>... (<span word="that">that</span>).../<span word="It">It</span> <span word="is">is</span> <span word="believed">believed</span>/<span word="said">said</span>/<span word="thought">thought</span>/<span word="reported">reported</span>... <span word="that">that</span>...“人们相信/说/认为/报道……”。 Ⅳ.单元语法→识记·思考·运用 条件句与混合条件句 用所给词的适当形式填空 1.<span word="If">If</span> <span word="Mother">Mother</span> __________(<span word="tell">tell</span>) <span word="me">me</span> <span word="the">the</span> <span word="truth">truth</span> <span word="when">when</span> <span word="I">I</span> <span word="was">was</span> <span word="young">young</span>，<span word="I">I</span> <span word="would">would</span> <span word="not">not</span> <span word="make">make</span> <span word="such">such</span> <span word="mistakes">mistakes</span> <span word="so">so</span> <span word="often">often</span> <span word="now">now</span>. 2.<span word="You">You</span> <span word="could">could</span> <span word="answer">answer</span> <span word="most">most</span> <span word="of">of</span> <span word="the">the</span> <span word="questions">questions</span> <span word="now">now</span> <span word="if">if</span> <span word="you">you</span> ______________(<span word="review">review</span>) <span word="the">the</span> <span word="lessons">lessons</span> <span word="last">last</span> <span word="night">night</span>. 3.<span word="If">If</span> <span word="you">you</span> <span word="had">had</span> <span word="studied">studied</span> <span word="hard">hard</span> <span word="before">before</span>，<span word="you">you</span> ___________(<span word="be">be</span>) <span word="a">a</span> <span word="college">college</span> <span word="student">student</span> <span word="now">now</span>. 4.*<span word="I">I</span> <span word="didn">didn</span>'<span word="t">t</span> <span word="hear">hear</span> <span word="the">the</span> <span word="phone">phone</span>.<span word="I">I</span> <span word="must">must</span> ____________(<span word="be">be</span>) <span word="asleep">asleep</span>. 5.*<span word="I">I</span> <span word="could">could</span> _____________(<span word="work">work</span>) <span word="out">out</span> <span word="the">the</span> <span word="problem">problem</span>，<span word="but">but</span> <span word="I">I</span> <span word="was">was</span> <span word="too">too</span> <span word="nervous">nervous</span>. <span word="had">had</span> <span word="told">told</span> <span word="had">had</span> <span word="reviewed">reviewed</span> <span word="would">would</span> <span word="be">be</span> <span word="have">have</span> <span word="been">been</span> <span word="have">have</span> <span word="worked">worked</span> 【联想·积累】 混合条件句 当条件状语从句所表示的行为和主句所表示的行为发生的时间不一致时，这种虚拟条件句称为错综时间条件句。动词的形式要根据它所表示的时间作出相应的调整。 <span word="If">If</span> <span word="you">you</span> <span word="had">had</span> <span word="taken">taken</span> <span word="the">the</span> <span word="doctor">doctor</span>'<span word="s">s</span> <span word="advice">advice</span>，<span word="you">you</span> <span word="would">would</span> <span word="be">be</span> <span word="better">better</span> <span word="now">now</span>. 如果你接受了医生的建议，你现在就会好多了。 [单 词 点 睛] 1.<span word="seek">seek</span> (<span word="sought">sought</span>，<span word="sought">sought</span>)<span word="vt">vt</span>.寻找，寻求；追求；探求；探索；试图</p>
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