《英语it的用法》PPT课件

To do
It is important to know your limitations.
知道自己的局限性是很重要的。
It is a good idea to go camping.
去野营是个好主意。
It is against the law to do that.
这样做是违法的。 It gives me great pleasure to see the movie. 观看电影让我很高兴。
用强调句改写句子
①Prof. Lin teaches us English. It is Prof. Lin who teaches us English. (强调主语) ②Prof. Lin teaches us English. It is English that Prof. Lin teaches us. (强调宾语) ③ I saw the film in Shanghai. It was in Shanghai that I saw the film. (强调状语) ④ I went to university in 2001. It was in 2001 that I went to university. (强调状语)
两词都可代替某一特定名词，但that指同一类，并非 同一个。
2. 用作非人称代词
Read and analyze the sentences.
It is Friday today. date
It was very cold last Monday. weather
It is about 8:30 now. time
with him？
你认为和他吵值得吗？
主语从句
（1）It + be + 名词 + that从句 e.g. It is a pity/a fact/a wonder/no wonder that… （2）It + be + 形容词 + that从句 e.g. It is important/likely/possible/right that… （3）It + 不及物动词 + that 从句 e.g. It seems/happens/appears that… （4） It + be + 动词的过去分词 + that从句 e.g. It is said/believed/known/reported that…
2. Someone is ringing the doorbell. Go and see ＿＿ A. who is he B. who he is C. who is it D. who it is
Life is like a fire; it begins in smoke, and ends in ashes.
It is about 25km from Longxian to Bazi. distance
It lies in the south of Shaoguan city. place
It is 40°C ! You got a high fever! temperature
日期 Conclusion: it 可以用作非人称代词, 表示_____, 天气 ______, 时间 ______, 距离 ______, 地点 ______ 温度 等。 _____,
4. It 做形式宾语
当复合宾语中的宾语是不 定式、动名词、宾语从句 时，往往把宾语放在它的 补足语后面，而用it作形式 宾语，放在谓语之后。
结构：动词+ it +宾语补足语+真正 的宾语（不定式、动名词、从句）
IT做形式宾语的6123结构 6：动词：consider, think, make, find, believe, feel 1：形式宾语：it 2：宾补：名词和形容词 3：真正的宾语：to do, v-ing, 从句
主语从句中除了that也可能是疑问词引导的
It is st源自文库ll a question how many people
are to come.
多少个人会来，还是个问题。
It is none of your business where I
spend my summer.
我在哪儿过夏天，这不关你的事。 It remains to be seen whether it will do us harm or good. 对我们有好处还是有害处，还要等着瞧。
⑤He didn’t go to bed until his mother came back.
It was not until his mother came back that he went to bed.
not … until … 句型的强调句
1)句型为：It is/ was not until + 被强调部 分 + that + 其它部分 2)注意：因为句型中It is/ was not … 已 经是否定句了，that后面的从句要用肯 定句。
6.用于特殊句型中
①make it 及时赶到;成功;办成
相当于 in fact, in reality 意为实际 上，事实上 ③that’s it 相当于That’s all. That’s so much. 意为“到此为止，没有别的了； 就这样” ④forget it 用于回答sorry，也可以委婉表示拒 绝或不同意。
⑤ It is easy to open a shop but hard to keep it always open. 创业容易守业难。 ⑥ It takes three generations (代) to make a gentleman. 十年树木, 百年树人。
用作人称代词
作非人称代词
做形式主语 作形式宾语
Proverbs(谚语) with “It”
① It is never too old to learn. 活到老, 学到老。 ② It is easier to fall than to rise. 摔倒容易爬起来难。 ③ It is no use crying over spilt (溢出的) milk. 覆水难收。 ④ It never rains but it pours(泼水). 不鸣则已, 一鸣惊人。
由你决定
12. It couldn’t be better/ worse.
没有比这更好的了/更糟糕的了。
13. It doesn’t matter. 14. Don’t mention it. 15. take it for granted
没关系
不用谢
想当然
7.常用句型及考点
1. It + be + adj. of/for sb to do sth
她回来时已接近午夜。 It was nearly midnight when she came back. 这里很吵。 It is noisy here. 今天很冷。 It is very cold today.
3. It 做形式主语
it可以用作句子的形式主语,而把 句子逻辑上的真正主语移到后面去, 可以移到后面的主语是： To do V-ing 主语从句
it与that的区别
The climate of South China is mild ; I like ______very much. A. that B. it C. one D. this （it指the climate of South China） The climate of South China is much better than ______of Japan. （that指the climate） A. that B. it C. one D. this
【人生犹如火堆，始于青烟，终于灰烬】
1.用作人称代词
①代替前文提到的事物 ②指代身份和性别等不 明确的人
it与one的区别
① — Do you still have the bicycle? Attention: — No, I have sold ______. 这两个词都可以代表前面说过的名词 , A. that B. it C. one D. this ② — Is this knife yours? it用于同名同物的场合； —No. It is Xiao Zhang’s. Mine is _____ on the desk. one则用于同名异物的场合。 A. that B. it C. the one D. this ③ My bike has been stolen. I think I should buy____. A. that B. it C. one D. this
用于强调结构 习惯用法
1.D。it指代上文提到的事。
1. The boy became fatter and fatter each day and ＿made his parents sad. A. which B. what C. he D. it
2.D。it作人称代词,用来指代身份和性别 等不明确的人。
辨析： It + be + adj. of sb to do sth It + be + adj. for sb to do sth
It is kind of you to help me. It is foolish of him to do that. It is important for us to study hard. It is difficult for them to settle the problem.
如果句型中的形容词是用来描述sb的特征（如 kind/rude/cruel/polite/right/wrong/foolish/ silly/stupid/wise等），则用 of 此时句式可 以换成sb + be + adj. + to do sth； It’s kind of you to help me. = You are kind to help me. 若句型中形容词是用来描述不定式性质的（如 important/necessary/hard/difficult/easy/ natural/common等），则用 for
2. It is time (about time，high time) that… 是时候该做某事了 本句型中that后的从句应该用虚拟语气。 3. It is the first (second…)time that… 第一次…… 本句型中that后的从句要用现在完成时 4. It takes sb time / money to do sth． 5. It doesn’t matter whether… 是否……没关系 6. It is up to sb to do sth． 由某人决定做某事
It is a wonder that he is still alive.
他居然还活着, 真是个奇迹。
It happened that the harvest was bad that year.
碰巧, 那年的收成不好。 It is said that there was an earthquake in Japan. 据说日本发生了地震。
②as it is
⑤got it
意为明白了，理解了
⑥guess it 猜对了 ⑦worth it 相当于useful，有好处，值得做
⑧take it easy
不要慌，别担心 信不信由你
⑨believe it or not
11. It’s up to you.
10. It (all) depends 那要看情况，还没有定下来
I think it no use arguing with him. 我认为和他争吵没有用。 I found it very interesting to study Japanese. 我发现学日语非常有趣。
5.用于强调句中
强调句基本结构： It is/was + 被强调部分 + that/who + 句子的其他部分 如果强调的是人，可以用who代 that。
V-ing
no good (不好） no use （没用） great fun （很有趣） worthwhile（值得） a new experience (一种新的经历）
It is
doing sth.
It is great fun working for him.
为他工作很有意思。
Do you think it is worthwhile quarrelling