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用心爱心专心116号编辑Unit4Astronomy:thescienceofthestarsPeriod1Grammarpoints.一.语法要点主语从句:在复合句中作主句的主语的从句叫主语从句。引导主语从句的词有连词that,whether;连接代词who,what,which;连接副词when,where,how,why等。Eg:Whichteamwillwinthematchisstillunknown.主语从句放在句首,句子常显得笨重,因此一般把它放到句子后面,前面用引导词”it”来作主语。Eg:It’sstrangethathedidn’tcomeyesterday.二.重点难点1.Nobodyknewthatitwasgoingtobedifferentfromotherplanetsgoingtobedifferentfromotherplanetsgoingroundthesun.goingroundthesun为现在分词短语定语,表示一般的动作。Eg:Menbreakingthelawwillbepunished.现在分词短语,也可表示进行的动作2.Weatherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.formillionsofyearstocome中不定式tocome作定语,与前面的名词有逻辑上的主谓关系。Eg:Sheisthelastpersontotelllies.3.Theproblemwasthattheearthbecameviolentbecauseitwasnotclearwhetherthesolidshapewastolastornot.Theproblemwasthat…,that引导表语从句,that只起连接作用,无意义,但不能省略。Eg:Thetroubleisthatweareshortofmoney.4.Astheearthcooleddown,waterbegantoappearonitssurface.asconj.随着,在…期间;由于,因为;尽管,即使;当…的时候;像…一样5.Thatmadeitpossibleforlifetobegintodevelop.it是形式主语,真正的主语是不定式tobegintodevelop.Eg:Hethinksit’shisdutytohelpothers.三.功能句型指示(Introductions)Pleaselookat/listento…Pleasepayattentionto...Pleasecheckthat…Makesureyou…Don’tforgetto…Watchoutfor…Youneed…You’dbetter…Youmust/mustn’t…四.重点单词及短语单词①atmospheren.大气,空气,气氛afriendlyatmosphere友好的气氛atmosphericadj.大气的,有气氛的②violentadj.剧烈的,厉害的;(人)暴戾的;(感情、言语)激昂的,激烈的violencen.剧烈,暴行violentlyadv.激烈地,粗暴地③solidadj.n.固体的;实质的;纯粹的;结实宾;牢靠的,稳固的④explodevt.vi.爆炸,使爆炸;感情爆发;驳倒,推翻explosionn.爆发,爆炸explosiveadj.爆炸性的,爆发性的⑤surfacen.外表,表面;adj.表面的,外表的;vt.vi.浮出水面,给…装上表面⑥dissolvevt.vi.使溶解,溶解;解散,消除,解除dissolutionn.解散,溶解⑦harmfuladj.有害的harmn.v.危害,伤害harmlessadj.无害的harmlessnessn.无害,无恶意,天真无邪harmfullyadv.有害地harmlesslyadv.无害地⑧spreadvt.vi.n.(使)张开,伸展,扩张;涂;散布,传播;(使)蔓延⑨existvi.在,存在,生存existencen.存在;生活,生存⑩massn.团,块,堆,众多,大量;pl.群众,民众;质量短语intime迟早,最后intimeforsth./todosth.及时,不迟prevent…from阻止某人做某事(from有时可省略,但在被动说现语态中不能省)dependon/upsth.依靠,指望;相信;取决于cheerup使某人高兴或更快乐nowthat既然,由于breakout突然发生,逃出某地makesenseof…理解,弄懂,有道理,有意义,理智的