Unit5AdelicateworldUsinglanguage课件-高中英语选择性.pptx

P3UsinglanguageAdelicateworldUnit5

?含义?类型it作为形式主语，代替句子的逻辑主语，并无实际词义。这可以保持句子的结构平衡，避免主语太长，显得头重脚轻。it作形式主语?It指代不定式?It指代动名词?It指代从句

?常见句型(1)Itisclear/obvious/true/possible/certain/…that…(2)Itisimportant/necessary/right/strange/natural/…that… (should)do…(3)Itissaid/reported/learnt/…that…(4)Itissuggested/ordered/required/…that...(should)do...(5)Itisapity/shame/…that…(6)Ithappens/seems/looks/appears/…that…(7)Itdoesn’tmatterwhether/if…(8)Itlooks/seemsasif…(9)Itis+adj.+ofsb+todo…/It+be+adj.+forsb+todo(10)Ittakes…(sometime)todo(11)Itis/wasawasteoftimedoing…(12)Itis/wasnogood/usedoing…(13)Itis/wasworth/worthwhiledoing…

Lookatthesentencesandanswerthequestions.Group2Group10,000peoplereadingmyblog!bIlovetophotographtherisingsun,…a.NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.b.NovisitorwouldthinkthattheislandbeingaUNESCOWorldHeritageSiteissurprising.0,000peoplereadingmyblog!bIlovetophotographtherisingsun,…c.Expertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.d.Expertsfelttocomeupwithaplantoremovealltherabbitsfromtheislandwasnecessary.Whatdoes“it”refertoinsentences(a)and(c)?2.Whatisthedifferencebetweenthesentencesineachgroup?Whentheobjectofasentenceisathat-clause(b)oraninfinitive(d),wesometimesuse“it”asanemptyobjectandputtherealobjectlatertokeepbalance.

1.Thisincidentmadeitclearthattherat,mouseandrabbitproblemneededsolvingonceandforall.(U5P68)2.Thisinterventionisalong,much-delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.(U5P68)3.Channelsofcommunication,suchasthemobilephoneandtheInternet,havemadeitpossibletospeakinstantlywithsomeoneontheothersideoftheplan