1、人教课标高二 选修 6Unit 4性质功 能例 句代词用作人称代词，代替上文提到的人或事物。Who is it?Its me.Youve helped me a lot;Ill never forget it.ItIt的用法及强调句型的用法及强调句型性质功 能例 句代词用以代替指示代词this或that。Whats this?Its a computer Whose book is that?Its hers性质功 能例 句代词表示时间、天气、距离、价钱等。Its time for lunchIts raining hardIts two miles from the school to ou
2、r home引导词作形式主语,代替由不定式、动名词或从句等表示的真正主语。It is easy to buy a new radio.It is no use telling him that.It doesnt matter whether she comes or not.引导词作形式宾语,代替由不定式、动名词或从句等表示的真正宾语。I feel it my duty to helphim.We thought it no use doing that.Ive made it clear that nobody is allowed to smoke here.引导词表示强调,其结构是:I
3、t is/was+强调部分+that+原句剩余部分。此结构只限于强调状语、主语和宾语。注意：如果强调的是人,其后用that或who 均可;如果强调的是物、时间或地点等状语,其后只能用that不用where、when、why。引导词I saw Tom yesterday here.It was I that/who saw Tom yesterday here.It was Tom that/who I saw yesterday here.It was yesterday that I saw Tom here.It was here that I saw Tom yesterday.引导词注
4、意:若原句是notuntil句型,在强调until 部分时,要把否定形式放入被强调部分。例如:He didnt leave until l returned.=It was not until I returned that he left.易与强调句型*若强调谓语,则用do/does/did+动词原形,常译为“的确”“一定”等,该结构只能用于陈述句或祈使句中。引导的强调句与其它从句的区别在于：Do be patient!(一定要耐心点)He does want to learn English well.(他的确想学好英语。)It was in the place that I was bo
5、rn.(强调句)It was the place where I was born.(定语从句)混淆的其它从句 强调句型中前后时态应一致;被强调的部分为主语、宾语和状语,若把it is/was和that/who去掉,剩下的词语能重新组成正确的句子,而且不缺成分,否则就是其它从句。It was in 1945 that World War II ended.(强调句)It was 1945 when World War II ended.(定语从句)It was a long time since I met you last.(时间状语)It is time that you went to
6、bed.(定语从句)口诀代词 it 本意它,既可指这又指那;时间天气均可指,谈到距离也用它;假主假宾均可做,强调句型跟that。1.Was it on a lonely island _ he 2.was saved one month after the boat 3.went down?（四川2011）A.where B.that B.C.which D.what从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。2.It is not how much we do but how much love we put into what we do _ benefits our wor
7、k most.（陕西2011）A.who B.which B.C.that D.what3.It was from only a few supplies that she had bought in the village _ the hostess cooked such a nice dinner.（安徽2010）A.where B.that B.C.when D.which4.It was _ he came back from Africa that year _ he met the girl he would like to marry.（江西2009）A.when;then B.not;until C.not until;that D.only;when5.Ive read another book this week.Well,maybe _ is not how much you read but what you read that counts.（浙江2009）A.this B.that B.C.there D.it
