book6 unit3 Grammar

1 Itisnevertoooldtolearn 活到老 学到老 Lookattheseproverbsandseewhattheyhaveincommon 2 Itrainscatsanddogs 大雨滂沱 3 Itneverrainsbutitpours 不鸣则已 一鸣惊人 4 Itisapoormousethathasonlyonehole 1 Itisnevertoooldtolearn 2 Itrainscatsanddogs 3 Itneverrainsbutitpours 4 Itisapoormousethathasonlyonehole It iswidelyusedinEnglish It isveryusefulandcanbeusedinmanyways Thesubjectposition ItisamazingthatatmyageIamstillfit 2 Itiseasiertofallthantorise 3 Itisnogoodcryingoverspiltmilk It canbeusedinthesubjectpositiontostandfor or aclause aninfinitive ingform Lookatthesentencesandthinkabouttheway it isused Theobjectposition 4 Ithinkitbestthatyoushoulddomoreexercise 5 Hefounditdifficulttoaccustomhimselftogettingupearly aclause aninfinitive ItisamazingthatatmyageIamstillfit 2 Itiseasiertofallthantorise 3 Itisnogoodcryingoverspiltmilk 4 Ithinkitbestthatyoushoulddomoreexercise 5 Hefounditdifficulttoaccustomhimselftogettingupearly It canbeusedinthesubjectorobjectpositiontostandfor or aclause aninfinitive ingform 形式主语句型It s adj possible necessary important easy strange naturaltodo that It s n pity honor shame wonder todosth It s adj n doingsth It s ed that Ittakessb sometimetodosth ItseemsthatItremainsasecret tobedone Itmatters It slikely unlikelythat 形式宾语句型Make think feel find consider it adj n todosth Like enjoy appreciate dislike hate dependon seeto take forgranted it 从句Iwouldappreciateitifyoucananswermyquestion Shehatesitwhenyouuseherbooks Willyouseetoitthatluggageisbroughtback 2 Someyoungpeoplethinktheylookattractivewhentheysmoke Itseems Givingupsmokingisdifficulttodo Itis thatsomeyoungpeoplethinktheylookattractivewhentheysmoke difficulttogiveupsmoking Rewritethesesentencesusingan it structure 3 Mostpeoplebelievesmokingcausescancer Itisbelieved 4 Don ttrytoquitonastressfulday Itisnouse tryingtoquitonastressfulday thatsmokingcausescancer 5 Myfatherhasquitsmokingatlast Itiswonderful thatmyfatherhasquitsmokingatlast 6 Chinaproducesonethirdoftheworld scigarettes Itisastonishing 7 Youarenotallowedtoadvertisecigarettesinthiscountry Itisillegal thatChinaproducesone thirdoftheworld scigarettes toadvertisecigarettesinthiscountry 8 Youcouldsufferfrombadhealthifyoukeepsmoking Itislikely 9 Youhavetotakepillstocontrolyourbloodpressure Itisnecessary foryoutotakepillstocontrolyourbloodpressure thatyoucouldsufferfrombadhealthifyoukeepsmoking Itisabeautifulday 2 Itneverrainsbutitpours 3 Itwastimetoquitesmoking 4 Itis10kilometerstothecastle 5 Itweighed4kg 6 It sverynoisenow 7 ItisFridaytoday 8 ItliesinthesouthofShaoguancity Itis40 Yougotahighfever who sknockingatthedoor Itmightbethemilkman 观察 It可指代时间 距离 温度 日期 天气 重量 长度 环境 方位 性别不明的人 婴儿 It one that区分 它们均作代词用于指代前文提到的名词 It是同名同物 one和that是同名异物Ilikethebike butIhavenoenoughmoneytobuyit Ilikebicycles butIcan taffordtobuyone ThebikewhichIwanttobuyismorebeautifulthanthathehas One为泛指 相当于a an 名词That为特指 相当于the 名词Achairmadeofsteelisstrongerthatonemadeofwood ThewaterinthecupishotterthatthatinthepotOne只能代替可数名词单数 代替可数名词复数用ones that既可代替不可数名词可以代替可数名词单数 代替可数名词复数用those Ilikearedpenmo