it做形式宾语的用法

Theuseof“it”asaformofanobjectHefounditdifficulttostopsmoking.Ithinkitbestthatyoushoulddomoreexercise.Shethoughtitnogoodworryingabouthim.It作形式宾语代替不定式短语,从句或动词-ing。1.It用作形式宾语当不定式（短语）、动名词（短语）或从句在句子中作宾语时，为保持平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾。此时it只起引导作用，无意义。S+v+it+adj.n(forsb)todosth..从句doingsth+……findpossible1.S+think+it+necessary+(forsb.)todosth./that-clausefeelimportant……Sentencepatterns:形式宾语…arule2.S+V+it+one’sduty+(forsb.)todosth./that-clauseanhonour…3.S+V+it+nogood+doingsth.nouse完成句子（1）They________________（发觉……难）tofinishtheirworkintwodays.（2）We________________（认为……是我们的职责）tocleanourclassroomeveryday.（3）Itisimportant_______（对她来说）tocometotheparty.founditdifficultthinkitourdutyforher作形式宾语(PreparatorySubject)为了记忆方便我们把该句型总结为6123结构。6指主句中常用的动词：think,believe,make,find,consider,feel；1指的是形式宾语it；2指的是宾补的两种形式：形容词或名词；3指的是真正宾语的三种形式：不定式短语，动名词短语或从句。Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.1.Thefactthatshewasforeignmade____difficultforhertogetajobinthatcountry.A.SoB.muchC.thatD.it2.Thedoctorthought____wouldbegoodformetohaveaholiday.A.thisB.thatC.oneD.It3.Idon’tthink_______possibletomasteraforeignlanguagewithoutmuchmemorywork.A.thisB.thatC.itsD.it4.It作形式宾语的特殊用法1.某些表示“喜、怒、哀、乐”的动词，如like,enjoy,love,hate,dislike,appreciate等后往往不能直接接宾语从句；必须先由it担任形式宾语,再接从句.Wewouldmuchappreciateitifyoucoulddousthatfavour.要是你们能帮我们这个忙，我们将非常感激。I'dpreferitifIdidn'thavetofinishthework.要是我不必完成那项工作，那就太好了。2.某些含有介词的动词短语如seeto,dependon,answerfor,relyon,insiston,lookto,stickto等结构中往往不能直接接宾语从句；必须先由it担任形式宾语,再接从句.I'llseetoitthateverythingisreadyintime.我将负责按时做好一切准备。YoumaydependonitthatTomwillhelpyouwithyourEnglish.你放心，汤姆会帮助你学英语的。I’mcountingonitthatyouwillcome.我指望着你会来。1.Ilike_______intheautumnwhentheweatherisclearandbright.2.A.thisB.thatC.itD.one2.Ihate__whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them