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1、He found it difficult to stop smoking.I think it best that you should do more exercise.She thought it no good worrying about him.It作形式宾语代替不定式短语,从句或动词-ing。第1页/共11页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，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，常用为保持平衡，避免句式结构的混乱，常用it it作形式宾语，而将真作形式宾语，而将真正的宾语放在句尾。此时正
2、的宾语放在句尾。此时it it只起引导作用，无意义只起引导作用，无意义。S+v+it+adj.n(for sb)to do sth.从句doing sth+第2页/共11页 find possible1.S+think +it +necessary +(for sb.)to do sth./that-clause feel important Sentence patterns:形式宾语 a rule2.S+V +it +ones duty +(for sb.)to do sth./that-clause an honour 3.S +V+it +no good +doing sth.no u
3、se 第3页/共11页完成句子完成句子（1）They_（发觉难）tofinishtheirworkintwodays.（2）We_（认为是我们的职责）tocleanourclassroomeveryday.（3）Itisimportant_（对她来说）tocometotheparty.found it difficultthink it our dutyfor her 第4页/共11页作形式宾语(Preparatory Subject)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i
4、t；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。We think it our duty to clean our classroom every day.He felt it important learning English well.They found it difficult that they would finish their work in two days.第5页/共11页1.Thefactthatshewasforeignmade_difficultforhertogetajobinthatcountry.A.SoB
5、.muchC.thatD.it2.Thedoctorthought_wouldbegoodformetohaveaholiday.A.thisB.thatC.oneD.It3.Idontthink_possibletomasteraforeignlanguagewithoutmuchmemorywork.A.thisB.thatC.itsD.it第6页/共11页4.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.We would mu
6、ch appreciate it if you could do us that favour.要是你们能帮我们这个忙，我们将非常感激。Id prefer it if I didnt have to finish the work.要是我不必完成那项工作，那就太好了。第7页/共11页2.某些含有介词的动词短语如see to,depend on,answer for,rely on,insist on,look to,stick to 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.Ill see to it that everything is ready in time.
7、我将负责按时做好一切准备。You may depend on it that Tom will help you with your English.你放心，汤姆会帮助你学英语的。Im counting on it that you will come.我指望着你会来。第8页/共11页1.I like _ in the autumn when the weather is clear and bright.2.A.this B.that C.it D.one2.I hate _when people talk with their mouths full.A.it B.that C.these D.them第9页/共11页第10页/共11页感谢您的观看。第11页/共11页