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1、Unit 9 It smells deliciousIt It 用法用法Who is it?It is me .这里的这里的“it”“it”是什么意思呢？是什么意思呢？It was stolen.They promise me to find it.It is a pity.这里的这里的“it”“it”是什么意思呢？是什么意思呢？It It 用法用法一一. 作指示代词作指示代词二二. 作形式主语或形式宾语作形式主语或形式宾语三三. 用于强调句用于强调句一，作指示代词一，作指示代词1）it 可作指示代词代替上文提到的事物或情况。可作指示代词代替上文提到的事物或情况。1.My pen is mis
2、sing, I cant find it anywhere.2.Tom has failed in the exam.Have you heard about it?it 用法和用法和which 引导的非限制性定语从句用法的区别。引导的非限制性定语从句用法的区别。He failed in the exam，and it worried him.He failed in the exam. It worried him.He failed in the exam，which worried him.2)当说话者不清楚说话对象的性别时当说话者不清楚说话对象的性别时,可用可用it来表示来表示。Its
3、 a lovely baby. Is it a boy or a girl？Go and see who it is.Its me. Open the door, please3) It 指天气、时间、距离、自然现象、环境等。指天气、时间、距离、自然现象、环境等。It is sunny today.It is five oclock.It is twenty miles to the zoo.It is very quiet here.It is spring now.二二. 作形式主语或形式宾语作形式主语或形式宾语 it 作形式主语或形式宾语作形式主语或形式宾语,代替不定式、动名代替不定式、
4、动名词、主语从句或宾语从句。词、主语从句或宾语从句。It is interesting to listen to the popular music.It is no use learning a theory without practice.It is not yet known where she has gone.I find it very easy to surf the internet.I think it my duty to serve the people.I think it necessary that students should master a foreign
5、 language at school. It is interesting to listen to the popular musicto listen to the popular music.It is no use learning a theory without practice.learning a theory without practice.It is not yet known where she has gone.where she has gone.I find it very easy to surf the internetto surf the interne
6、t.I think it my duty to serve the people.to serve the people.I think it necessary that students should master a foreignstudents should master a foreign language at school. language at school. 我们觉得改掉坏习惯很难。We found it very hard to get rid of the bad habit.Its very hard to get rid of the bad habit.在公共场
7、所大声讲话是不礼貌的。It is impolite to talk loudly in public places.吃太多朱古力没什么好处。It is not good eating too much chocolate. It+is/was+It+is/was+强调部分强调部分+ that / who (whom) + that / who (whom) +其他其他主语，宾语，表语或状语主语，宾语，表语或状语 强调的部分是人，强调的部分是人，that可以由可以由who/whom换用。换用。 it 用于强调句用于强调句部分部分一一. 陈述句的强调句型结构陈述句的强调句型结构 : For exa
8、mple：1. Tom ate an egg at home this morning . 强调主语：强调主语： It was Tom that / who ate an egg at home this morning .强调宾语：强调宾语： It was an egg that Tom ate at home this morning . 强调时间状语：强调时间状语： It was this morning that Tom ate an egg at home.强调地点状语：强调地点状语：It was at home that Tom ate an egg this morning .1
9、.Tom ate an egg at home this morning .Conclusion: 陈述句的强调句型陈述句的强调句型结构结构 : It is /was+ 被强调成分被强调成分 (主语主语/宾语宾语/状语等状语等) +that/who+句子的其他成分。句子的其他成分。（it在这种句型中本身无实际意义）在这种句型中本身无实际意义）Notice： 1. 除除谓语动词谓语动词以外的成分都可用于强调句中以外的成分都可用于强调句中; 2. 如原句时态为现在时或将来时，则如原句时态为现在时或将来时，则be 用用 is, 如原句时态为过去时如原句时态为过去时,则则 be用用 was; 3. 当
10、被强调部分指人时，既可以用当被强调部分指人时，既可以用that,也可用也可用 who .二二.一般疑问句的强调句型：一般疑问句的强调句型：1.It was Tom that / who ate an egg at home this morning . Was it Tom that / who ate an egg at home this morning ?2.It was at home that / who Tom ate an egg this morning . Was it at home that Tom ate an egg this morning ?Conclusion:
11、Is / Was +it +被强调的部分被强调的部分 + that / who + 其余部分其余部分?三三.特殊疑问句的强调句型：特殊疑问句的强调句型：Conclusion:被强调部分被强调部分 (通常是疑问代词或通常是疑问代词或疑问副词疑问副词) +is / was + it + that / who +其余部分其余部分?1.It was this morning that Tom ate an egg at home. When was it that Tom ate an egg at home?2.It was at home that Tom ate an egg this morning .Where was it that Tom ate an egg this morning ?
