英语语法教学课件：it的用法
1.It was about 600 years ago ______ A the first
clock with face and an hour hand was
made． (NMET97，单项填空)
A．that B．until C．before D．when
2.____computers play such an important part B
⑧. It is important ( necessary, right, strange,
natural...) that ...
记住that 后的从句应用虚拟语气（should
+ 动词原形），should 可以省去．
⑨. It is suggested ( ordered ... ) that ...
◆
It is up to parents to teach their children
manners. 该由父母教孩子礼貌。
5. It is + 被强调部分 + that ... 将被强调的部分放在前面，其它部分置 于 that 之后．被强调部分可以是主语，宾 语，表语或状语．强调的主语如果是人， that 可以由 who 换用．如果把这种句型结构 划掉后，应该是一个完整无缺的句子．这也 是与其 它从句区别判断的方法． 注意: It is not until + 被强调部分 + that ... 强凋“直到…才…”，需将 not 置于 until 之前
2．用于表达天气、环境、时间、距离、季
节等。
◆
It’s half an hour’s walk from here to our
school．
◆
It’s nice and warm here．But it’s two o’clock
now, and it’s time for us to go to school．
⑤. It happens (seems, appears ) that... ◆ It happened that I had seen this problem in some book. ⑥. It is said (reported, learned....) that ... “据说”（据报道，据悉．．．） ◆ It is said that he has gone to New York to attend a medical meeting. ⑦. It is a pity ( a shame ... ) that ... ◆ It is a pity that we have lost the match with a close score.
内容提要
1. it作. it作形式宾语,常用在6123结构中.(think ,
find, make, believe, …)
4. it作形式主语. 当动名词,不定式,从句作主语
时,常用it作形式主语.
5. It is … that….的强调句型.
in our daily life?
A．Why it is that B．Why is it that
C．Why was it that
D．Why is it
3. It was only when I reread his poems recently
____I B began to appreciate their beauty．
that 后的从句要用虚拟语气（should + 动
词原形），should 可以省．常译为＂据建
议；有命令…）
⑩. It is up to sb. to do sth.
该句型为“该由某人做…”。该句型中
up 后的to是介词。
◆
It is up to him to clean our classroom today. 今天应由他做教室清洁。
注意下列几种表示时间的句型
①.It is time ( about time ,high time ) that ... ◆ It’s high time that we left. ②.It is the first ( second ... ) time that ... ◆ It’s the first time that I have been praised. ③.It is .... since ... ◆ It’s three years since they got married. ④.It is / was ... when ... ◆ It was 1949 when the PRC was founded. ⑤.It is / was ... before ... ◆ It will be two years before we meet again.
②. It takes sb. ... to do sth. “做…要花某人…” ◆ It took me ages to repair my computer. ③. It is no good (use ) doing sth. 该句型中的真正主语是动名词短语，主句中 的表语可以是 no good , no use , no value, no importance … ◆ It’s no use crying over the spilt milk. ④. It doesn’t matter whether ( if ) ... ＂不论（是否）…没关系… ◆ It doesn’t matter whether he is for my plan or not.
4. It is necessary ( for sb. ) to do sth.
此句型中的真正主语是不定式短语，主句中的形 容词通常是表示重要性，紧迫性，频繁程度，难 易，安全等情况的形容词，常见的形容词有：①
important, necessary, natural ② easy , safe , common , normal , hard , difficult , dangerous , unusual, rare , impossible , pleasant 在①中的形容词作表语可以用从句改写， 如：It is important for her to come to the party. = It is important that she (should ) come to the party
3. We think it important to learn a foreign language. 该句型中的it 作形式宾语。为了记忆方便我 们可称该句型为“6123结构”。 6 指主句中常用的动词：think, believe, make, find, consider, feel； 1 指的是形式宾语 it； 2 指的是宾补的两种形式：形容词或名 词； 3 指的是真正宾语的三种形式：不定式短 语, 动名词短语或 that 引导的宾语从句。
A．until B．that C．then D．so 4. It was how the young man had learned five foreign languages______ B attracted the audience’s interest.
A. so that B. that C. what D. in which
It作形式主语时的几个常见句型: ①. It is kind ( of sb. ) to do sth. 该句型中的不定式如果须要逻辑主语，则 须要前置介词 of, 而句型中的形容词必须是 能表示逻辑主语特征的形容词，常见的有： bad , brave , careless, clever , cruel , foolish , good （好心的）, honest , horrible , kind , lazy , modest , naughty , nice（有教养的）, polite, rude , silly , stupid , wise , wrong 这个句型可以改写为：sb. is kind to do sth.
1．代替上文中提到过的人或事物。指代人时， 一般用于小孩或身份不十分明朗的人。 例 如： －Who is the baby? －It’s my teacher’s son． －Who is that gentleman? －It’s my friend, Tom．He (不可用It) wants to see you． 【典型例题】 (NMET2001) The Parkers bought a new house but _____ B will need a lot of work before they can move in. A. they B. it C. one D. which
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高中英语 语法代词 it的用法课件(共32张ppt)
2) It was not until __C__ that ____ to prepare his lessons. A. did his father come in, the boy began B. did his father come in, did the boy begin C. his father came in, did the boy begin D. his father came in, the boy began
3) I hope that it will be fine Weather tomorrow.
4) It’s spring now.
Season
5) It’s quiet here. Circumstance
2. 用作人称代词, 代表前面提到的人 或事。
1) Who’s it? _It_’_s me. 2) Look at the picture. _I_t is a picture
Exercises
1) It was not _C__ she took off her dark
glasses ___ I realized she was a
famous film star.
A. when, that B. until, when
C. until, that
D. when, then
3. I don’t think __D_ possible to master a foreign language without much memo ry work. A. this B. that C. its D. it
4. Was it during the Second World War _A__ he died? A. that B. while C. in which D. then
英语语法it形式主语和形式宾语ppt课件
20
1 it 代替不定式（短语） 当不定式（短语）在复合宾语结构中作某些动词（如think, make, find,
consider, feel, suppose等）的宾语时。
I find it pleasant to work with him. They felt it my honor to be invited to speak here.
It
6.(改错)That felt funny watching myself on TV.
It
17
Summary
it
①It is+adj for/of sb+to do sth
作 代替不定式 ②It is+n+to do sth
为
③It takes/took sb+sth+to do sth
形
代替动名词 It is+no use/good/useless/pleasure/a wa
3
？ It is frightening to go climbing with him. to go climbing with him 是真正的主语
To go climbing with him is frightening.
通常it作为形式主语，在句中没有实 际意义，只是满足语法需要，起到 一个平衡句子结构，避免句子头重 脚轻的作用。
11
• ⑥ It + takes + (sb.) + some time + to do sth. •这是一个表示“（某人）花多少时间干某事”的 句型，其中it是形式主语，代替后面的不定式 （to do sth.），句型中的sb.也可以省略。
1 it 代替不定式（短语） 当不定式（短语）在复合宾语结构中作某些动词（如think, make, find,
consider, feel, suppose等）的宾语时。
I find it pleasant to work with him. They felt it my honor to be invited to speak here.
It
6.(改错)That felt funny watching myself on TV.
It
17
Summary
it
①It is+adj for/of sb+to do sth
作 代替不定式 ②It is+n+to do sth
为
③It takes/took sb+sth+to do sth
形
代替动名词 It is+no use/good/useless/pleasure/a wa
3
？ It is frightening to go climbing with him. to go climbing with him 是真正的主语
To go climbing with him is frightening.
通常it作为形式主语，在句中没有实 际意义，只是满足语法需要，起到 一个平衡句子结构，避免句子头重 脚轻的作用。
11
• ⑥ It + takes + (sb.) + some time + to do sth. •这是一个表示“（某人）花多少时间干某事”的 句型，其中it是形式主语，代替后面的不定式 （to do sth.），句型中的sb.也可以省略。
It 的 用法(共16张PPT)
What was it that the man in black 我向老师保证，要不了几个月我就能掌握高考的全部词汇。
Not until I graduated from the university did I see him.
robbed me of near the school last Don’t take it for granted
It was near the school that the man in black robbed me of my mobile phone last year because of my carelessness.
children in poor areas have access Don’t take it for granted
the school last year because of my carelessness.
Who was it that robbed me of my mobile phone near the school last year because of my carelessness.
强调句的特殊疑问句
school because of my carelessness.
When was it that the man in black robbed me of my mobile phone near the school because of my carelessness.
强调句的特殊疑问句
学校规定，考试中作弊的学生将受到严惩。 The school makes it a rule that those
who cheat in the exams will be seriously punished.
Not until I graduated from the university did I see him.
robbed me of near the school last Don’t take it for granted
It was near the school that the man in black robbed me of my mobile phone last year because of my carelessness.
children in poor areas have access Don’t take it for granted
the school last year because of my carelessness.
Who was it that robbed me of my mobile phone near the school last year because of my carelessness.
强调句的特殊疑问句
school because of my carelessness.
When was it that the man in black robbed me of my mobile phone near the school because of my carelessness.
强调句的特殊疑问句
学校规定，考试中作弊的学生将受到严惩。 The school makes it a rule that those
who cheat in the exams will be seriously punished.
高考英语二轮复习：it的用法课件(共40张PPT)
① It is difficult for a foreigner to learn Chinese. ② It is everyone’s duty to obey the law. ③ It took them a year to build the bridge. ④ It is up to us to help those in need.
二、it 作形式主语
⒊ it代替主语从句：这个主语从句可以用连词that引导，也可以用连接 代词或连接副词引导。
①It is clear ( obvious， true， possible， certain....) that ...该句型中 it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显 然，真的，肯定……）＂ 是主语从句最常见的一种结构。 ➢ It is very clear that he’s round and tall like a t真正的主语移到句子 后部去，使句子显得平衡，避免“头重脚轻”。it作形式主语时，可以代 替三种形式：不定式、动名词和主语从句。
二、it 作形式主语
1. it代替不定式短语，常用于下列句型中： It + be +adj + (for/of sb.) to do sth. It + be + n + to do sth. It takes sb. some time to do sth. It’s up to sb. to do sth.
二、it 作形式主语
b) It doesn’t matter（It’s no wonder；It doesn’t make too much difference等）＋连接代词或连接副词引导的从句。 ➢ It doesn’t matter whether we go together or separately. ➢ It is no wonder why he came here too late.
二、it 作形式主语
⒊ it代替主语从句：这个主语从句可以用连词that引导，也可以用连接 代词或连接副词引导。
①It is clear ( obvious， true， possible， certain....) that ...该句型中 it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显 然，真的，肯定……）＂ 是主语从句最常见的一种结构。 ➢ It is very clear that he’s round and tall like a t真正的主语移到句子 后部去，使句子显得平衡，避免“头重脚轻”。it作形式主语时，可以代 替三种形式：不定式、动名词和主语从句。
二、it 作形式主语
1. it代替不定式短语，常用于下列句型中： It + be +adj + (for/of sb.) to do sth. It + be + n + to do sth. It takes sb. some time to do sth. It’s up to sb. to do sth.
二、it 作形式主语
b) It doesn’t matter（It’s no wonder；It doesn’t make too much difference等）＋连接代词或连接副词引导的从句。 ➢ It doesn’t matter whether we go together or separately. ➢ It is no wonder why he came here too late.
归纳it的用法PPT课件
法 • 注： it作形式宾语时，宾语之后一定要 有宾语补足语。否则，就不能用it了。 因为宾语已经在句末。
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III. 用在强调句型中的it (1)
It
• 强调句子的主语, 宾语, 表语或状语时，常用：
• “It is/was + 被强调的部分 + that连剩余部 分”. 这种句型不能强调谓语动词。如果强调 的部分是人，可用who/whom代替that。
= It is the place that I was born in.
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It
III. 用在强调句型中的it (4)
• 注6：在特殊疑问句中，只能强调特殊
疑问词。其结构为：“疑问词+强调句型 的 的一般疑问句？”
用• 即：“wh- + is/was it that连剩余部分？”
（3、4）
3) 在表达感情时可用 she, her, he, him代
替 it, its. 指国家、船只、飞机、火车、汽
的
车和城镇等无生命的东西。
用
e.g. We love our motherland. We are proud
of her.
法
4) 在回答 “what’s this/that?” 的答语中,
用it 代替 this/that。
e.g. What’s this/that? It’s a computer.
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It
I、 用作人称代词的it （5）
5) 指时间天气日期温度和距离。常不 的 翻译出来。
e.g. “What time is it?” “It’s 9 o’clock.” 用 It’s five years since he left.
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III. 用在强调句型中的it (1)
It
• 强调句子的主语, 宾语, 表语或状语时，常用：
• “It is/was + 被强调的部分 + that连剩余部 分”. 这种句型不能强调谓语动词。如果强调 的部分是人，可用who/whom代替that。
= It is the place that I was born in.
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It
III. 用在强调句型中的it (4)
• 注6：在特殊疑问句中，只能强调特殊
疑问词。其结构为：“疑问词+强调句型 的 的一般疑问句？”
用• 即：“wh- + is/was it that连剩余部分？”
（3、4）
3) 在表达感情时可用 she, her, he, him代
替 it, its. 指国家、船只、飞机、火车、汽
的
车和城镇等无生命的东西。
用
e.g. We love our motherland. We are proud
of her.
法
4) 在回答 “what’s this/that?” 的答语中,
用it 代替 this/that。
e.g. What’s this/that? It’s a computer.
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It
I、 用作人称代词的it （5）
5) 指时间天气日期温度和距离。常不 的 翻译出来。
e.g. “What time is it?” “It’s 9 o’clock.” 用 It’s five years since he left.
it用法总结ppt课件
3). It be ... before ... 该句型主句中的 it 指时间， 主句中的时态常是一般将来时或过去 时两种时态．主句中的表语多是long， not long ， 3 days ， 2 weeks 等表示时间段的词或短语，常译为“．．．之后．．．”。
It was 3 days before he went to Beijing. It will be not long before he finishes his job.
8
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
②. It is suggested ( ordered /demanded/insisted/commanded... ) that ...
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形）， should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It is time that children went to bed.
② It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。
It is the first time I have been here. = This is the first time I have been here.
It was 3 days before he went to Beijing. It will be not long before he finishes his job.
8
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
②. It is suggested ( ordered /demanded/insisted/commanded... ) that ...
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形）， should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It is time that children went to bed.
② It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。
It is the first time I have been here. = This is the first time I have been here.
高中英语语法-It-的用法课件人教版课件
It-作为形式主语
It-作为形式宾语
It-引导强调句型
It-在固定搭配中 的用法
回 顾 I t-的 用 法 的 重 点 与 难 点
It-作为形式主语
It-作为形式宾语
It-引导强调句型
It-在固定搭配中的用法
对未来学习的展望
掌握更多英语语法知识 提高英语阅读和写作能力 培养英语语感和语用能力 拓展英语文化背景知识
古 英 语 和 中 世 纪 英 语 中 的 I t用法
It-在强调句型中的用法和演 变
I t-的 用 法 的 文 化 背 景
单击此处添加标题
强调句型：在英语中，使用“It is/was...that...”结构来强调某个句子成分， 如主语、宾语或状语。
单击此处添加标题
形式主语：使用“It”作为形式主语，代替真正的主语，使句子更加简洁。
主语
It-作为形式主 语，用于避免 句子头重脚轻
It-作为形式主 语，用于构成 固定句型结构
I t-作 为 形 式 宾 语
It-作为形式宾语的定义 It-作为形式宾语的用法 It-作为形式宾语与真正宾语的区别 It-作为形式宾语在句子中的作用
I t-引 导 强 调 句 型
强调句型结构：It is/was +被强调部分+that/who+其他部分
It-作为形式主语的用法举 例
It-作为形式主语与真正主 语的区别
I t-作 为 形 式 宾 语
定义：It作为形式宾语，用于代替真正宾语的位置
用法：常与make、take等动词连用
特点：使句子结构更加平衡，避免头重脚轻
例子：如“It takes me an hour to finish my homework every d a y. ”
《英语it的用法》PPT课件
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.
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
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。
To do
It is important to know your limitations.
知道自己的局限性是很重要的。
【精品】it的用法、常用句型PPT课件
It is (high) time that ... （早就）该…… It’s first / second / third / ... time + that ... 这是 某人第几次干某事（从句谓语用现在完成时）
It is / has been +一段时间+ since ... 自从……已 经……； It wasn’t / won’t be long before ... 没过多久就 / 很快…… It’s + 时间段 + before ... 过……时间才…… 五、it与one的区别 两者均可代替前面提到的事物，区别是：it指的 是与前面已提到的事物为同一物，此时的it等于 “the +名词”；而one 指的是与前面已提到的事 物为同一类物，此时的one等于“a +名词”。如：
III. 选用正确的词完成下面短文。 it, these, that, what, the
Do you have a drawer or a box of your special stuff? 1. __I_t __ may look like junk to anybody else, but to you 2. _i_t __ may be very important. Maybe 3. __i_t_____ is your set of last year’s hockey cards, a bottle top you hoped would show the winning number, the smoothest pebbles you could find on the beach, and your class photo. If you have kept things like 4. _t_h_e_se____, then you are a collector! Some people might call 5. ___th_e____ collection junk,
It is / has been +一段时间+ since ... 自从……已 经……； It wasn’t / won’t be long before ... 没过多久就 / 很快…… It’s + 时间段 + before ... 过……时间才…… 五、it与one的区别 两者均可代替前面提到的事物，区别是：it指的 是与前面已提到的事物为同一物，此时的it等于 “the +名词”；而one 指的是与前面已提到的事 物为同一类物，此时的one等于“a +名词”。如：
III. 选用正确的词完成下面短文。 it, these, that, what, the
Do you have a drawer or a box of your special stuff? 1. __I_t __ may look like junk to anybody else, but to you 2. _i_t __ may be very important. Maybe 3. __i_t_____ is your set of last year’s hockey cards, a bottle top you hoped would show the winning number, the smoothest pebbles you could find on the beach, and your class photo. If you have kept things like 4. _t_h_e_se____, then you are a collector! Some people might call 5. ___th_e____ collection junk,
it的用法精讲ppt课件
另外，用于该句型的动词还有order, command, suggest, propose, advise, demand, require. request等表示“请 求，建议，命令”等词。此时that 后的从句要用虚拟语气 （should + 动词原形），should 可以省。如： It is suggested that the meeting (should) be put off. It was ordered that the project be completed by the end of this year.
判定强调句型的方法： 将itis/was和that去掉后，剩余
的部分仍然是一个完整的有意义 的句子。
【典型例题】
1. It’s not doing the things we like, but
liking the things we have to do
____makes life happy.
(1)强调句的肯定句式： It is/was＋被强调部分＋that/who＋句子其 余部分。
It was Jane who paid for the meal yesterday. (强调主语)
It is in the hall that they have had a meeting. (强调地点状语)
(4)若强调“not ... until”结构中由until 所引导的时间状语时，用固定的强调句型： It is/was＋not until ...＋that ... It was not until he took off his dark glasses that I realized he was a famous film star. 直到他摘下墨镜我才认出他是著名的影星。