1、Unit 3 A healthy life Period 3 Learning about Language 语法专题课 it的用法(),【课前热身】 完成句子, 体会画线部分在句中的用法。 _ _ _ that at my age I am still fit. 在我这个年龄我依然很健康似乎很令人惊讶。,It,seems,amazing,_ _ _ _ _ smoking, but millions have managed to quit and so can you. 戒烟不容易, 但是数百万人已成功地戒了烟, 因此, 你也能。 _ _ _ _ the National Palace M
2、useum. 参观故宫博物院是值得的。,Its,not,easy,to,stop,It,is,worth,visiting,_ _ _ _ _ here and I am sitting under the big tree at the end of the garden. 今天天气很好, 我正在花园尽头的一棵大树下坐着。,It,is,a,beautiful,day,Your mother tells me that you started smoking some time ago and now you are finding _ _ _ give it up. 你妈妈告诉我前一段时间你
3、开始吸烟, 并且现在你发 现戒烟很难。,it,difficult,to,【课堂诠解】 . it用作人称代词it的最基本用法是作代词, 代替上文出现的人或事物。指代人时一般指婴儿或身份不明确的人。,My phone is ringing. _ must be the courier. 我的手机响了, 一定是快递员。 Who is the baby? _ _ _ _. 这个小孩是谁? 是我老师的儿子。,It,Its,my,teachers,son,. it用作非人称代词it作指示代词时, 主要指时间、距离、价值、天气、气候及温度等自然现象。有时, 它还可以指代上下文提到过的同一个事物。,_ _ a
4、ll day yesterday. 昨天下了一天的雨。 _ _ _ to go there now. 现在去那儿已经太 迟了。 How far _ _ from here to the station? _ about two kilometers. 从这儿到车站有多远? 大约两千米。,It,rained,Its,too,late,is,it,Its,Whats the cost of the dictionary? _ _ sixty-three yuan. 那本词典多少钱? 六十三元。,It,is,I cant find my watch. You havent found _? If y
5、ou want to buy a new _, I suggest you buy one made in China. 我的手表找不到了。 你还没找到吗? 如果你想买一个新的, 我建议你 买一款中国制造的。,it,one,【易混辨析】 常用的名词替代词it, one, ones, that, those的区别,. it用作形式主语当动词不定式、动名词或从句作主语时, 通常用it作句子的形式主语。常用于以下结构中:,1. It is +adj. (important/difficult/hard/necessary/possible. . . )+ (for sb. )to do sth. 对
6、于我们来说学好英语是重要的。(汉译英) _ _ _ _ _ _ _ AIDS patients in a proper way. 以一种合适的方式帮助艾滋病人是没有危险的。,It is important for us to learn English well.,It,is,not,dangerous,to,help,2. It is +adj. (kind/nice/brave/stupid/necessary/important. . . )+ of/for sb. to do sth. (用适当的介词填空) It is stupid _ him to refuse a job as a
7、 reporter onthat well known newspaper. It is necessary _ us to finish the task on time.,of,for,【名师指津】“It is+adj. +of/for. . . ”结构中的of与for在“It is +adj. +of/for sb. . . . ”结构中, 介词of与for的区别是: of用于指某人的性格、属性、特征等, 介词for表示对象, 意为“对来说”。,3. Its no use(no good, useless, senseless, etc. )+动 名词。 _ _ _ _ _ over s
8、pilt milk. 覆水难收。 看太多电视是没用的。(汉译英) _,It,is,no,good,crying,It is no use watching too much TV.,4. It is clear(obvious/true/possible/certain. . . )+that 从句, 常译为“是清楚的(显然的/真的/可能的/肯 定的)”。 _ _ _ _ he doesnt like it. 很清楚, 他不喜欢它。 _ _ _ _ our team will win the game. 很显然, 我们队将会赢这场比赛。,Its,very,clear,that,It,is,ob
9、vious,that,5. It is important (necessary/right/strange/ natural. . . ) +that从句, 常译为“是重要的(必要的/对的/奇怪的/自然的)”。that后的从句中要用虚拟语气, 即should+动词原形, should可以省略。,It is important that we _(keep) calm in an emergency. 在紧急情况下保持镇静是重要的。 It is necessary that the problem _ (settle)at once. 有必要马上解决这个问题。,(should)keep,sho
10、uld be settled,6. It is a pity(a shame/an honor/a surprise. . . )+that 从句。 It is a pity that the weather isnt appropriate for our outing today. (英译汉) _ _ _ _ _ _ I have not heard from you for years. 真遗憾, 我多年没有收到你的信了。,今天天气不适合我们出行, 真是遗憾。,It,is,a,shame,that,. it用作形式宾语 1. 用于“主语+及物动词+宾语+宾语补足语”句型中。当复合宾语是不
11、定式、动名词或宾语从句时, 常用it作形式宾语, 而往往把真正的宾语(不定式、动名词或宾语从句)放在它们的补足语后面。这些动词有think, make, find, consider, suppose, feel等。,I think _ no use _ _ _. 我认为和他争吵没有用。 I found _ very interesting _ _ _. 我发现学英语非常有趣。,it,arguing,with,him,it,to,study,English,(2016北京高考)_ _ _ _ to get in touchwith us, youd better keep this card
12、at hand. 为了更容易和我们取得联系, 你最好随身带着这张 名片。 I feel _ _ _ _ I should devote myself to teaching. 我认为致力于教学是我的责任。,To,make,it,easier,it,my,duty,that,2. 用于“主语+及物动词+宾语+宾语补足语”句型中。英语中有些词汇(like, love, dislike, hate, appreciate, help, depend on, count on, see to等)后面不能直接跟宾语从句, 需先加形式宾语it, 然后再加宾语从句。,I _ _ when people ta
13、lk with a full mouth. 我讨厌人们含着满嘴食物说话。 I will _ _ _you can help me. 如您能帮助我, 我将不胜感激。 You can _ _ _ _ he is very smart. 你就相信吧, 他非常聪明。,hate,it,appreciate,it,if,depend,on,i,t,that,Please _ _ _ _ you bring enough money when you go out. 出门时, 务必带够钱。,see,to,it,that,. 其他句型 1. It is +时间段+since从句。 _ _ _ _ _ he j
14、oined the army. 自从他参军以来已经三年了。,It,is,three,years,since,2. It is the+序数词+time+that从句, 该从句用现在完 成时。如果is改为was, 后面从句的时态用过去完成 时。意为“这是某人第几次做某事”。 It is the first time that I _(visit)the Great Wall. 这是我第一次参观长城。 It was the first time that she _ _ independently. 这是她第一次独立生活。,have visited,had,lived,3. It will (no
15、t) be+时间段+before从句, 从句后跟一般 现在时, 意为“(没)过多久就”。 It will not be long before they understand each other. (英译汉) _,他们不久就会互相了解。,4. It happens (seems/looks/appears) +that从句, 常译 为“碰巧, 似乎是, 看起来”。 It happened that he met his teacher in the street. (英译汉) _ _ _ _ he will be back in a few days. 看来他几天后就会回来了。,他在街上碰巧
16、遇到了他的老师。,It,seems,that,5. It is said/believed/reported that. . . 据说/认为/报 道 _ _ _ _ the rhythm of tides is affected by the moon. 据说潮汐的涨落受月亮的影响。,It,is,said,that,6. It takes sb. some time to do sth. 某人花费一些时 间做某事。 _ _ _ quite a while _ fill out the questionnaire. 填写那份问卷花了我好长一段时间。,It,took,me,to,【课堂小结】 1. it常指时间、距离、天气、事物及上下文提到的同一物。 2. it用作形式主语与宾语, 以便平衡句子结构。 3. it的特殊句型较多, 须谨记。,
