Unit4Astronomy:thescienceofthestars主語從句（TheSubjectClause）（一）語句概念在合句中當(dāng)主語子，叫做主從。句子結(jié)：“主語句（引詞+主語語..謂語動(dòng)子其它...”Whathesaidisofgreatimportance.他所說很要。Thatwillgoupiscertain.物價(jià)上漲是定的。（二）語句引導(dǎo)：連詞that無義,whether（是）連接代who/who（）,whose（誰）,what（...的）,which(哪一個(gè)連接副when什么時(shí)）,where（哪里,how（何/么）,why（為什）（）that引導(dǎo)主從，本身無詞在從句做成分但可省略egThatTompassedtheexamhis1

parentshappy.湯通（）whether引導(dǎo)主從，意為是否，從句中做成分，可略，位句時(shí)不能if。Whetherwe‘llgocampingtomorrowontheweather.明天我是去野營(yíng)決天氣。（）what引導(dǎo)主從，意“...的事在從句做主語、語表語，可略。Whatisforthespacetripiscarefulpreparation（what在從作主語去太空行需要的是細(xì)的準(zhǔn)。Whattheywantisagood（what在從句作賓）他們想的是一本書（）其它殊問詞引的語從句注意特疑詞引導(dǎo)主從句要陳述語序Whowilldoitdoesn’tmatter.誰做這事沒關(guān)。Whichplanisbetterwillbeannouncedlater.哪個(gè)計(jì)更好稍宣布。bookitisisunknown.2

它是誰書不知。Whenthemeetingwillbeheldhasn’tbeendecided.會(huì)議什時(shí)候舉還沒有定。wewillgoforapicnicisstillaproblem.我們要哪里野營(yíng)然是個(gè)題Whydinosaursdiedoutremainsapuzzle.恐龍為滅絕了然是個(gè)。Howgoldwasfoundisnotclear.金子是何那里發(fā)現(xiàn)的在還不楚。（三）語句it做形式主為了避主顯得過，以用it作為句的語，把語句移到子末尾。.that引導(dǎo)主從句，it作形式主常句式：)It+adj（certain,likely,surprising,..+that從句Itiscertainthatshewilldowellinexam.可以肯她考的很。注意以幾個(gè)形詞常用擬語氣式：“Itis+adj（strange奇怪的natural自然的，necessary必然的，important重要的that從句”（從句語詞“should+動(dòng)原形，should可3

省略）Itisstrangethat(should)havetreatedhisparentslikethat.真奇怪他然那樣待父母。Itisimportantthatstudentsshouldattendallthelectures.所有的生應(yīng)該去課這是很要的。2）+be+n(a/nowonder奇怪/難anhonor榮幸，apity/ashame遺憾，+that從句)Itisnowonderthatyouaresotired.難怪你么累呢Itisawonderthatyouhavebeenwalkingforhours.令人奇的一直了幾個(gè)小。Itisapitythatyoucan'tdance.真遺憾不會(huì)跳。3It+be過去詞（known,said,reported,thought..）that從句Itiswellknownthatpracticemakes眾所周熟生巧。注意：issuggested/proposed/recommended(建議，提)desired(要求)+that從句，句謂語動(dòng)詞“should動(dòng)詞原should可省略。4

Itissuggestedthatthemeeting(should)beputofftillnextweek.人們建會(huì)推遲到周Itisdesiredthateverystudent(should)obeytheschoolrules.強(qiáng)要每個(gè)學(xué)都該遵守校紀(jì)律。4）Ithappens/happenedthat從句（巧...）Ithappenedthatshewasoutwhenhecalled.他打電時(shí)碰巧不家.whether引導(dǎo)主語句，it作形式主常用句：1)whether與ornot直接用Itmakesnodifferencewhetherornotwillcome.他是否無要緊。2)whether與表示擇or連用Itmakesnodifferencewhetherheorleaves.他是來是無關(guān)要。3)與ornot不直接連，whether/if都可Itmakesnodifferencewhether/ifwillornot.他是否無要緊。3.特殊問詞（who,when,why,where,how..）引導(dǎo)主語從，it作形主常用句：5

Itmakesnodifferencewherewewillhavethemeeting.我們?cè)谀臅?huì)都無所謂Ithasn’tbeendecidedwhowillgiveusaspeech.誰要給們演講還有決定Itishardtounderstandwhythereisgravity.為什么引難理。（四）語句注意1.主語句的語：陳述序bookitisisunknown.它是誰書不知。Howgoldwasfoundisnotclear.金子是何在那里被現(xiàn)的現(xiàn)在還清楚。2.主謂致單個(gè)主語從做主語主句的語

動(dòng)詞用單。Whenthemeetingwillbeheldhasn’tbeendecided.會(huì)議什時(shí)候舉還沒有定。Whydinosaursdiedoutremainsa