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1、Unit 3 A healthy life Grammar：The usages of it,一.基本用法: it 做代词,1) Look at the picture. _is a picture of our school. 2)Someone is knocking at the door. Who is _?,1.用作人称代词，代替前面提到的人（不明确的）或物,也可以指动物或婴儿.,it,It,-Is this your book? -Yes, _ is. 2.用于代替指示代词this 和that.,it,一.基本用法: it 做代词,1） It is half past eight
2、now. 2）Its only half an hours walk from here to our school. 3）I hope that it will be fine tomorrow. 4） It has rained much this year. 5） Its spring now. 6） Its quiet here. 7） It is 40! You got a high fever!,3.非人称代词用以表示时间、距离、天气、气候、季节、环境、温度等,time,distance,weather,climate,season,environment,temperature,
3、1.人称代词 a.用作人称代词，代替前文提到的人或物，以避免重复: b.也可以指动物或婴儿(未知性别的婴儿或孩子). 2.非人称代词 有时并不指具体的东西，可指天气、时间、距离、环境等 It was very quiet in the caf.It is half an hours walk to the city. 3.指示代词 指代this或that This is your pen, isnt it?,it 的基本用法,歌 名： Anything but ordinary(绝不平凡）歌 手： 艾薇儿拉维妮（Avril Lavigne）,Sometimes I get so weird I
4、 even freak myself out I laugh myself to sleep Its my lullaby Sometimes I drive so fast Just to feel the danger I wanna scream It makes me feel alive Is it enough to Is enough to breath Somebody rip my heart out,And leave me here to bleed Is enough to Somebody save my life Id rather be anything but
5、ordinary please To walk within the lines Would make my life so boring I want to know that I Have been to the extreme So knock me off my feets Come on now give it to me ,love,it,die,it,Is it enough to love？,It is enough to love.,（肯定句）,(一般疑问句）,形式主语,真正主语,当_、_、_在句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句
6、首，而将真正的主语放在句尾。此时it只起先行引导作用，本身无词义。,It be +,adj n p.p,(for/of sb) to do sth doing sth 主语从句,+,difficult, important，natural,necessary，etc.,fun, a pity, no use / good, time, etc.,said,reported, suggested, ordered, etc.,it用作形式主语,从句,动词不定式,动词-ing,give up drinking? difficult!,Complete the sentences,It is dif
7、ficult for them to _.,give up drinking,It is + adj+ to do sth.,See! A big hen ploughing (plaui 耕地)!,It is _. (看到如此大的一只母鸡是一件惊讶的事情),a surprise to see so big a hen,It is _. (看到如此大的一只母鸡耕地是一件有趣的事情),fun to see such a big hen ploughing,It is + n+ to do sth.,It is no goodno use _ (cry over spilt milk).,Oh!
8、My milk is spilt(溢出).,crying over spilt milk,It is+ _ + doing sth. 做.是没用的/没好处的,no use/no good,覆水难收。,Complete the sentences,到了我们要戒酒的时候了。 _.,Its high time that we should quit drinking,It is + （high） time+ that .should do. 到了做.的时候,It+ be +adj.+主语从句,注意：如若形容词为 important，necessary， good natural.多使用虚拟语气 sh
9、ould +动词原形 1.It is important that (我们尊敬父母是重要的.) 2.It is necessary that (我们记住这些单词是有必要的.),we (should) respect our parents.,we (should) remember these words,注意：常见的过去分词有believed, expected, reported, said, shown，如果主句中的过去分词是表示请求，建议，命令等词如：suggested/ ordered / demanded /insisted / commanded. 等时 that后的从句要用虚拟
10、语气（should + 动词原形），should 可以省略 1.It is shown that (鸡爪看上去像数字2）,It + be + 过去分词 + 主语从句,the chicken feet look like the number two,注意：常见的过去分词有believed, expected, reported, said, shown，如果主句中的过去分词是表示请求，建议，命令等词如：suggested/ ordered / demanded /insisted / commanded. 等时 that后的从句要用虚拟语气（should + 动词原形），should 可以省略
11、 1.It is suggested that (父母要关注孩子情绪。）,It + be + 过去分词 + 主语从句,parents should pay attention to,childrens feelings,It 用作形式宾语,当_、_、_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,(for sb) to do sth. 从句 doing sth,+,(find/think/feel),possible, important，necessary, etc.,a r
12、ule, ones duty, a honor, etc.,从句,动词不定式,动词-ing,我认为业余时间打篮球是有必要的。 _ _.,I think it necessary to play basketball in spare time,s+v+it+ adj/n + to do/that,I love it!,我发现在雪人旁点火(light a fire)是愚蠢的。 _ _.,I find it stupid to light a fire beside the snowman,s+v+it+ adj/n + to do/that,s+v+it+ adj/n + to do/that,
13、我认为不浪费粮食是我们的责任。 _.,I think it our duty not to waste food,I,Mary,in the street,yesterday,It was I that/who met Mary in the street yesterday.,It was Mary that I met in the street yesterday.,It was in the street that I met Mary yesterday.,It was yesterday that I met Mary in the street.,强调句,It be + 被强调部
14、分 +that /who +句子其他成分,I met Mary in the street yesterday.,1. It 无意义，不可换成this/that. 2. be 只用单数 is/was 3.被强调的部分不能为谓语动词. 4. 强调的部分是人 也可用who其它一律用that.,A,B,C,D,E,F,G,H,I,it,Consolidation,A,If you can answer correctly, I will give you the thumbs-up .,The group getting the most thumbs-up will be the winner.,
15、为 你 点 赞,积 赞 最 多,B,C,D,E,F,G,H,I,A riddle (谜语),代词我， 本意它， 即可指这又指那； 时间天气均可指， 谈到距离也用我； 形主形宾均可做，强调句型跟that.,Guess who I am . The answer is _?_.,“ it ” in daily life,1,2,3,4,5,6,It is up to you.,It doesnt matter.,I have got it.,Believe it or not,You will make it.,Dont mention it .,it,取决于你,没关系,你会成功,别提了,我懂了,信不信由你,The proverbs with it ,1.
