it用法课件.ppt

三、用以表示时间、距离、天气、气候、 季节、环境等
1) It is half past eight now. Time 2) It’s only half an hour’s walk from here
to our school. Distance 3) I hope that it will be fine tomorrow. Weather 4) It has rained much this year. Weather 5) It’s spring now. Season 6) It’s quiet here. Circumstance
It is illegal to drive a car without a license.
2) It be adj. of sb. to do sth. 此处adj. 通常为描述人的形容词: kind , nice, rude, polite, cruel, considerate, thoughtful, careful, careless,foolish, stupid, clever, wise, crazy.
③ It is + noun + 从句
It is a pity (a shame /an honor /a good thing/ a fact /a surprise/... ) that ... 该句型中, that后的从句一般用虚拟语气 (should + 动词原形), should可省去。表示 出乎意料, 常译为“竟然”。没有这种意义时, 则不用虚拟语气。如：
Proverbs(谚语) with “It”
It is never too old to learn. 活到老, 学到老。 It is no use crying over spilt (溢出的) milk. 覆水难收。 It takes three generations (代) to make a gentleman. 十年树木, 百年树人。
②It is v-ed that…
It is said (reported/believed.....) that ... 该句型中的it 仍是形式主语, 真正主语是that 引导的主语从句; 该结构常译为“据说(据报道, 据悉…)”。 It is said that he has come to Beijing. He is said to have come to Beijing.
The use of “it”
一、 用作人称代词, 代表前面提到的人或事物 1) Who’s it? ___It_’_s___ me. 2) Look at the picture. __I_t __ is a picture of our school.
二、用于代替指示代词this 和that。 ---Is this jacket yours? ---Yes, __i_t___ is.
四、it 用作形式主语
替代作主语的从句、动词不定式、 动名词, 而把真正作主语的从句、 动词不定式、动名词置于句尾。
1. 代替动词不定式做主语 1) It be adj. (for sb.) to do sth. 此处adj. 通常为描述事件的形容词: easy, difficult, necessary, important, possible, dangerous, right, wrong, legal, useful, useless,
It is a pity that such a thing (should) happen in your class. 这种事竟然发生在你们班上, 真是遗憾！ It is a pity that you can’t come. 你不能来，真是遗憾！
五、it作形式宾语
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, 放在宾语补足语之前。 该句型中的it 作形式宾语, 常用的动词有think, believe, make, find, consider, feel等。
I think it no use arguing with him. 参考： It is no use arguing with him. I found it very interesting to study English. 参考： It was very interesting to study English He made it clear that he was not into the car. 参考： It was clear that he was not into the car. Many new reserves have been built,w__h_ic_h__m_a_k_e_s__it__ _p_o_ss_i_b_l_e_f_o_r_t_h_e_m__o_n_k_e_y_s____(这使这些猴子可能)
3. 代替主语从句作形式主语 ①It is adj. + 从句 It is clear ( ob来自百度文库ious, true, possible, certain …) that ...（注意没有it is sure 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……)”, 是主语从句最常见的一种结构。 e.g. It is very clear that he is tall.
It's kind of you to help me with the problem.
2. 代替动名词做主语 It’s (well) worth one’s while doing/to do… It is worth my while to explore the city. 这值得我花时间/精力勘察这个城市 It’s (well) worthwhile doing/ to do… It is worthwhile to explore the city. It’s no good/ use/pleasure doing… It is no use studying only at school.