第04天
it作形式主语
高考频度：★★★☆☆
难易程度：★★☆☆☆
1. (2018?浙江卷·语法填空) Many westerners who come to China cook much less than in their own countries once they realize how cheap ___58___ can be to eat out. 【参考答案】it
【试题解析】考查it用法。句子为感叹句，正常语序应该是it can be cheap to eat out.其中不定式to eat out是真正主语，用it 是形式主语。故填it。 【拓展延伸】it作形式主语的句型：
It was obvious that...句型中，it为形式主语，that从句为真正的主语。常用于这种结构的形容词有：clear，strange，obvious，certain，important，possible，natural，surprising，interesting，likely，unusual等。 it作形式主语，没有具体意义，而只是帮助把真正的主语移至句子末尾，从而避免句子头重脚轻，使句子显得匀称。It作形式主语，其后的that从句才是真正的主语。 常用it作形式主语的句型有：
(1)It be＋形容词(possible, strange, natural, important ...)＋that从句 (2)It be＋过去分词(said, thought, believed, supposed, reported ...)＋that从句 (3)It＋不及物动词(seem, occur, happen ...)＋that从句
(4)It be＋名词短语(a pity, a fact, a wonder, an honour, an idea, no wonder ...)＋that从句 【特别注意】
1. 在＂It is/was suggested/proposed/desired+that＂从句中，从句常用虚拟语气，即从句谓语动词为：should+动词原形，should可以省略。
2. 在句型＂It is/was strange/important/necessary/essential ...＋that从句＂中，从句常用虚拟语气，即从句谓语动词为＂should＋动词原形＂，should可以省略。
?It is suggested that she (should) finish her homework this afternoon.
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建议她今天下午完成作业。 【归纳总结】
it 作形式主语，主要分为三种情况：不定式作主语、动名词作主语和从句作主语。具体用法如例： 1. 不定式作主语： ?It is a good idea to think this way. 这样考虑问题是个好办法。 ?It is not hard for one to do a bit of good. 对于一个人来说做点好事并不难。 ?It is wrong to tell lies. = To tell lies is wrong. 撒谎是不对的。 ?What a pleasure it is to work with you! 同你一起工作是多么愉快啊！ ?It needed hard work to finish the job. 要完成这项工作需要努力地工作。 2. 动名词作主语： ?It was nice meeting you. 见到你真高兴!（分别时用） ?It’s no good (use) doing that. 那样做没好处（没用）。 3. 从句作主语： ?It is a surprise that you gave such an answer to the question. 你对这个问题作了这样的回答，令人吃惊。 ?It is probable that he has known everything. 很可能他什么都已经知道了。 ?It appeared that he had a taste for music. 看来他对音乐有一定的鉴赏力。 ?It made us very happy that she was saved. 她能化险为夷令我们大家很高兴。 ?It says in the newspaper that the enemy has been defeated. 报纸上报导敌人被打败了。 2
1. 用it作形式主语的用法改写下列各个句子 ①To learn something about the use of “it” is necessary.
________________________________________________________________________ ②Crying over spilt milk is no use.
________________________________________________________________________ ③That the boss was behaving pretty strangely struck me.
________________________________________________________________________ ④Whether you come or not doesn’t interest me.
________________________________________________________________________ ⑤Tom is believed to win the race.
________________________________________________________________________ ⑥That a picture is worth a thousand words is not always true.
________________________________________________________________________ 2. 单句改错
①There is not necessary for you to have told her about the bad news. ②It is no good try to solve the issue between the nations by the means of war. 3. 完成句子
①It is a pity ____________________________________. 浪费这些食物真可惜。
②____________________________________ to leave school. 你中途退学，真是傻瓜。
③It took us three years ____________________________________. 我们花费三年时间才完成了这项工程。
④It ____________________________________ this way. 听起来这样做有道理。
⑤____________________________________ doing that. 那样做没用。
⑥It is not an easy task ____________________________________ . 做这工作真非易事。
⑦It is ____________________________________ . 据说李好去过欧洲。
⑧____________________________________ a rabbit ran out of the empty box on the desk. 桌上的空盒子里竟然跑出来一只兔子，太有趣了。
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《暑假作业》第04天 it作形式主语-每日一题之2019快乐暑假高二英语人教版
