九年级下册 英语 第四单元《Lesson 4 Grammar》课件

九年级下册—上海教育出版社—英语—第四单元Unit4NaturaldisastersLesson4Grammar学习目标通过这节课的学习，你将能做到以下几点：1.理解it作为形式主语的三种用法；2.适当运用it作为形式主语作一个天气报告；3.树立安全意识，增强防风避险能力。Howmany

pronouns

it?What’sthemeaningofit?It

指代具体事物(water)“It”作为形式主语(emptysubject)。13It

没有指代具体的事物

What’sthemeaningofit?What’sanemptysubject?Israining.Itisraining.“It”作为形式主语，没有实际语义。缺乏主语。Tellthemeaningsofit.It

指代具体事物/事件(water/manycitieswouldbefloodedanddisappear)Tellthemeaningsofit.It

没有指代具体的事物。

It作为形式主语，没有实际语义。28“It”作为形式主语，没有实际语义。第二个it指代具体事物(work)第一个It

没有指代具体的事物

Tellthemeaningsofit.“It”

作为形式主语，没有具体语义。“It”

用于指代具体事物图片来源于网络HaveyoueverexperiencedafloodinGuangzhou?图片来源于网络TyphoonlandingsinChinainthepast70years↓morethan250timesinGuangdong17times图片来源于网络图片来源于网络Typhoonaffectsourdailylives.BenandJaneareplanningtogocampingwiththeirfriendsthisweekend.But...图片来源于网络BenandJanecampingListentoaconversationandanswerthequestions.1.What’sthetimenow?2.Whatistheweatherliketoday?3.Whatistheseason?4.Whatisthetemperature?5.Howfarawayisthetyphoonfromthem?It’ssixo’clock.It’srainy.It’sautumn.It’s24degreescentigrade.It’sabout200km.图片来源于网络BenandJaneIt’ssixo’clock.It’srainy.It’sautumn.It’sabout200kmawayfromthem.It’s24degreescentigrade.用法1：it作形式主语表示时间、季节、天气、距离或温度timeweatherseason1.Whatisthetimenow?2.Whatistheweatherliketoday?3.Whatistheseasonnow?

Let’shaveatry.It’s2o’clockintheafternoon.

It’sSunnyoutthere.

It’sspring.P56B

Putthewordsinthecorrectordertomakemeaningfulsentences.Itistimeforsuppernow.ItisautumninAustralianow.Itisaboutfivekilometrestothepark.Itwaswindyyesterday.Therearemanydarkclouds,andthewindisblowingstrongly.图片来源于网络BenandJaneareupsetbecausethetyphoonmakesthemcancelthecamping.

Itappearsthatarainstormiscoming.Itseemsthatheisnothappywiththecancellation.图片来源于网络Benisfrowning.取消n.形式主语用法2：it作形式主语用于Itseems/appearsthat...的句型我们常使用带“形式主语it”的结构，将充当主语的从句移到句末。Itappearsthatarainstormiscoming.Itseemsthatheisnothappywiththeweather.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~真正的主语Itseemsthatheisnothappywiththecancellation.图片来源于网络WhatshouldIdonow?

图片来源于网络Itseemsthattheywilltakearaincheck.

Benmakesanewplanforthecamping.图片来源于网络1sunny/willbe/it/nextSaturday____________________________________2aboutthirtykilometres/it/is/tothecampground____________________________________3theywill/seems/it/havesomuchfun/that_____________________________________ItwillbesunnynextSaturday.Itisaboutthirtykilometrestothecampground.Itseemsthattheywillhavesomuchfun.Let’shaveatry.Putthewordsinbracketsinthecorrectordertocompletetheconversations.Itseemsthatatyphooniscoming.Itappearsthattheflighthasbeencancelled.Itseemsthatsomethingbadhashappenedtoher.Iheardthatshelostherpurse.Howcanwestaysafeduringatyphoon?

Itisimportanttostaycalm.=Tostaycalmisimportant.图片来源于网络Itisdangeroustostandunderatree.=Tostandunderatreeisdangerous.Howcanwestaysafeduringatyphoon?

thunderstorm图片来源于网络Itisagoodideatostayathome.=Tostayathomeisagoodidea.Howcanwestaysafeduringatyphoon?

图片来源于网络Itisimportanttostaycalm.=Tostaycalmisimportant.Itisdangeroustostandunderatree.=Tostandunderatreeisdangerous.Itisagoodideatostayathome.=Tostayathomeisagoodidea.当句子的主语是动词不定式短语时，动词不定式短语一般不放在句首，而通常用it来作为句子的开头，动词不定式短语则放在句末。用法3：It作形式主语代替todoGivesomeadvicetoJanebyusing

Itis+adj.+todosth.food,water,survivalkit/prepare/necessarytheweatherupdates/important/listentonow/thebeach/goto/sillyflowerpots/goodidea/bringin图片来源于网络It’snecessarytoprepareenoughwater,foodandasurvivalkit.water,food,asurvivalkit/prepare/necessary图片来源于网络图片来源于网络theweatherupdates/important/listento

It’simportanttolistentoweatherupdates.flowerpots/goodidea/bringinIt’sagoodideatobringintheflowerpots.图片来源于网络图片来源于网络It’ssillytogotothebeachnow.now/thebeach/goto/sillyWecanalsosay...It’snecessary(foryou)toprepareenoughwater,foodandasurvivalkit.It’simportant(foryou)tolistentotheweatherupdates.It’ssilly(ofyou)togotothebeachnow.图片来源于网络Whatarethedifferences图片来源于网络It’snecessary

foryoutoprepareenoughwater,foodandasurvivalkit.It’simportant

foryoutolistentoweatherupdates.It’ssilly

ofyoutogotothebeachnow.形容词介词Itis+

形容词

+(forsb.)+todosth.句型通常与表达必要性(necessary)、重要性(important)、危险性(dangerous)及可能性(impossible)等的形容词连用。It’snecessary

(foryou)toprepareenoughwater,foodandasurvivalkit.It’simportant

(foryou)tolistentoweatherupdates.Itisdangerous

(forus)tostandunderatree.Itisimpossible

(forBen)togocampingthisweekend.拓展1：Itis+形容词

+forsb.+todosth.句型convenient方便的difficult困难的easy容易的hard困难的possible可能的safe安全的unsafe不安全的educational有教育意义的It’ssilly

(ofyou)togotothebeachnow.Itisthoughtful

(ofyou)toturnoffpower,gasandwater.Itissensible

(ofBen)totakearaincheck.generous大方的kind善良的mean刻薄的nice和善的polite有礼的rude粗鲁的brave勇敢的cruel残忍的拓展2：Itis+形容词

+ofsb.+todosth.句型Itis+

形容词

+(ofsb.)+todosth.句型通常与描述人物品格的形容词连用。拓展3：Itis+名词/名词短语

+(forsb.)+todosth.句型It’stimeformetostudy.It’sagoodideatobringintheflowerpots.It’sa(great)pleasureforus

tohaveyouhere.Itwas

anexcitingmovietowatch.Let’shaveatry.1.台风来之前做一个计划是很重要的。______________

veryimportanforus______________aplanbeforethetyphooncomes.2.刮台风的时候远离窗户是个好主意。It______________

______________tostayawayfromthewindowsduringatyphoon.3.--妈妈，为什么我们不能喝水龙头的水？

--台风之后自来水似乎被污染了。--Whycan’twedrinkthetapwater,mum?--_______________________________thewaterispollutedafterthetyphoon.Itis

tomake

isagoodidea

Itseems/appearsthat

Hello,everyone.Itis_________________________________________Speaking图片来源于网络

假如你是学校英语电台的主播，请你播报今天的天气，并给予防御建议。Safetytips

Hello,everyone.It’sMay21,2022.

ThisisAnn.Andhereistoday’sweatheroutlookinGuangzhou.First,let’sseewhattheweatherisliketoday.It’srainyalldaytoday.Anditisalsoquitewindy.Thetemperatureistwentydegreescentigrade.Itseemsthatatyphoonisabouttocome.Isuggestyoushouldstaycalm.It’snecessaryforyoutoprepareenoughwater,foodandasurvivalkit.Doremembertomonitortheweatherupdates.It’sagoodideatotakearaincheckforoutdooractivitiessuchascampingorgoingtothebeach.Lifeisprecious,pleasestaysafeduringtyphoons.图片来源于网络林安儿Lifeisprecious!Wemustbecareful!图片来源于网络Summary&Assessment通过这节课的学习，你能做到以下几点：1.理解it作为形式主语的三种用法；2.适当运用it作为形式主语的句式作一个报告；3.树立安全意识，增强防风避险能力。图片来源于网络MakeaposteronHowToStaySafeDuringTyphoons.Homework图片来源于网络Thankyou!图片来源于网络九年级下册—上海教育出版社—英语—第四单元Unit4NaturaldisastersLesson4Grammar(答疑）否定句式：Itis+not+形容词

+(for/ofsb.)+todosth.Itisnotsafe(forhim)totakewrongactions.答疑1：Itis+todo句型的否定句式是什么？否定句式：Itis+not+名词/名词短语

+(forsb.)+todosth.Itisnotagoodidea(forthem)togooutdoorsduringatyphoon.疑问句式：Isit+形容词

+(for/ofsb.)+todosth.Myphoneisdead.Isitpossible(forus)toaskforhelp?答疑2：Itis+todo句型的疑问句式是什么？疑问句式：Isit+名词/名词短语

+(forsb.)+todosth.Isitanopportunaty(forhim)toworkinGuangzhou?改变be的时态：一般过去时：ItwasMay5,whenthetyphoonlandedintheircity.一般将来时：Itwillbesunnynextweek.现在完成时：Itha