Unit5WorkingtheLandDiscoverusefulstructures課件-高中英語(yǔ)人教版選擇性2

Unit5WorkingthelandDiscoverUsefulStructures

let’sreview然而，他最關(guān)心的是

農(nóng)民經(jīng)常糧食歉收

有時(shí)

甚至

出現(xiàn)嚴(yán)重的食物短缺。如何實(shí)現(xiàn)這一目標(biāo)

成為當(dāng)時(shí)一個(gè)頗具挑戰(zhàn)性的問題。然而，是否能開發(fā)出自花授粉作物的雜交品種，是一個(gè)有著爭(zhēng)論的問題（amatterofgreatdebate)Circlethesimplesubjectineachsentence.Timeflies.Icecreamisthefavoritedessertofchildren.Thechildreninthefirstrowreceivedbadges.WhywouldababyelephantbeeatingleavesWhogaveyouthatpresentToleavewashiswish.Tallbuildingsandwindyweatherdon’tmixwell.Eatyourdinnerwithaspoon.Drivingtoofastisdangerous.YouwhatyuanLongpingreallycaredaboutwasnotmoneyorcelebrity.ThatYuanLongpinghadrealisedhisdreamofseawaterricesurprisedthewholeworld.ItsurprisedthewholeworldthatYuanLongpinghadrealisedhisdreamofdevelopingseawaterrice.觀察劃線斜體部分在主句中的位置

文中還有，剛背過的———————————————————————————————————————————————————————————————————————————————————————————————————————————————————Whatconcernedhimmostwasthatfarmersoftenhadpoorharvestsandsometimesevenhadaseriousshortageoffoodtoeat.Discoverusefulstructures:Subjectclauseswhat在主語(yǔ)從句中充當(dāng)_______,譯為______主語(yǔ)事情Howthiscouldbedonewasachallengingquestionatthetime.

Whetheritwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.how在主語(yǔ)從句中充當(dāng)___________,譯為______whether在主語(yǔ)從句中充當(dāng)_______,譯為______方式狀語(yǔ)怎樣不做成分是否WhatimpressespeoplemostaboutYuanLongpingishisongoingabilitytofulfilhisdreams.主語(yǔ)從句，即在復(fù)合句中充當(dāng)主語(yǔ)成分的句子.what在主語(yǔ)從句中充當(dāng)_______,譯為______主語(yǔ)事情，東西引導(dǎo)主語(yǔ)從句的關(guān)聯(lián)詞從屬連詞(不作成分）連接代詞（作成分）連接副詞（作狀語(yǔ)）what,who,whom,whose,which,wh+everthat,whether,ifwhen,where,how,why讀一讀，體會(huì)what與that使用的不同whatyuanLongpingreallycaredaboutwasnotmoneyorcelebrity.ThatYuanLongpinghadrealisedhisdreamofseawaterricesurprisedthewholeworld.that和what的選用：that和what都可引導(dǎo)主語(yǔ)從句。但是，what除起連接作用外，還在主語(yǔ)從句中充當(dāng)成分，可做從句的主語(yǔ)、賓語(yǔ)、或表語(yǔ)，相當(dāng)于thething(s)that；而that在主語(yǔ)從句中不充當(dāng)任何成分，只起連接作用。Whetherhewillpasstheexaminationisstillunknown.(他是否能夠通過考試仍然不知道。)Itisnotclearifanyonewasinjured.that引導(dǎo)主語(yǔ)從句，表示某個(gè)事實(shí)或觀點(diǎn)。例如:Thatheisstillaliveisawonder歸納總結(jié)：★主語(yǔ)從句必須有引導(dǎo)詞；主語(yǔ)從句用陳述句語(yǔ)氣。★連詞位于句首不能省略★主語(yǔ)從句大多數(shù)情況下視為第三人稱單數(shù)，但也有例外.★主語(yǔ)從句引導(dǎo)詞的選擇主要是根據(jù)從句的結(jié)構(gòu)和意義來(lái)選擇。如果從句的意義和結(jié)構(gòu)完整，則用that。如果從句的意義和結(jié)構(gòu)不完整，則根據(jù)從句的意義和結(jié)構(gòu)選擇相應(yīng)的引導(dǎo)詞。練一練：用適當(dāng)?shù)倪B詞填空______________Indianeedsisalawtomakelandownershipfairer.Itisnotyetdecided__________________cashcropwillbeproducednextyear.____________________________hesaidwasright.WhatWhat/Whateverwhich/what1._________hewantsisabook.主語(yǔ)從句

2._________hewantstogothereisobvious.主語(yǔ)從句（itis..)3._________happenedisnotclear.主語(yǔ)從句WhatThatWhat由連詞that引起的主語(yǔ)從句：

ThatYuanLongpinghadrealisedhisdreamofseawaterrice

surprisedthewholeworld.

但是這類句子在大多數(shù)情況下會(huì)放到整個(gè)句子的后部去，而用代詞it作形式主語(yǔ)。ItsurprisedthewholeworldthatYuanLongpinghadrealisedhisdreamofdevelopingseawaterrice.

為了使句子保持平衡，常用it來(lái)代替主語(yǔ)從句，而把主語(yǔ)從句放到后面，that有時(shí)可以省略，例如：ThatEnglishhasbecomeagloballanguageisquiteclearItisquiteclearthatEnglishhasbecomeagloballanguage尤其是連詞that引導(dǎo)的主語(yǔ)從句常用于此種句式中。常用句型如下：It+be+名詞+that從句It+be+形容詞+that從句It+be+動(dòng)詞的過去分詞+that從句It+不及物動(dòng)詞+that從句Itisestimatedthatabout60percentofdomesticriceconsumptioninChinaiscomprisedofcropsgeneratedfromYuan'shybridstrains,andhisstrainshaveallowedChina'sfarmerstoproducearound200milliontonsofriceperyear.that在主語(yǔ)從句中充當(dāng)_______,譯為______,但不可省略。不做成分無(wú)意思12431.thefactthatthevegetableslookbeautifulontheoutside

2.thethingthatsheisunhappyabout

3.thewaythattheyaregoingtospendtheirretirement

4.thequestionwhethertheycanliveahealthylifewhatimpressesmemostisthatYuanLongpingsucceededinhelping