写作专题 阶段二：第七讲　避免头重脚轻的it句型 2021届高考北师大版英语一轮复习课件 (共13张PPT)

第七讲　避免头重脚轻的it句型 it除了用作人称代词外，还常用作形式主语或形式宾语，有时也可以用在一些固定句型中。灵活地运用it句型可使文章更高级，结构更紧凑。 一、it作形式主语的常用句型 在英语中，为了避免头重脚轻，经常运用it作形式主语，而把真正的主语后置，作真正主语的常为动词不定式(短语)或从句，有时也可用动名词(短语)。 1．It takes (sb.) some time/energy/effort... to do sth.“做某事花费(某人的)时间/精力……” It took them about half an hour to work out the difficult maths problem. 他们花了大约半个小时的时间才解出这道数学难题。 2．It is (was)＋形容词＋(of/for sb.) to do sth./It is (was)＋形容词＋that... ①[2018·江苏高考书面表达]In that case, it is both convenient and economical to buy books according to the ratings. 在那种情况下，按消费排名购买图书既方便又经济。 ②[2017·全国卷Ⅰ书面表达]It's necessary that you have a good knowledge of Tang Poetry. 你对唐诗有很好的了解是很有必要的。 3．It is (was)＋名词＋(for sb.) to do sth./It is (was)＋名词＋that... ①It is a tradition and virtue for us Chinese people to help those in need. 帮助需要帮助的人是我们中华民族的传统美德。 ②[2017·全国卷Ⅰ书面表达]It's really a good idea that we should spend some time taking a brief look at the history of the Tang Dynasty.我们应该花点时间简要了解唐朝的历史，这的确是个好主意。 4．It is/was＋过去分词＋that... [2018·全国卷Ⅱ书面表达]It is believed that the English short film will be not only meaningful but also interesting. 相信这部英文短片不仅有意义，而且很有趣。 5．It seems/appears/happens＋that...“似乎/碰巧……” It seems that no one knows what has happened in the park.似乎没有人知道公园里发生了什么事。 6．It is the first/second... time that...“这是第一/二……次……” [2017·天津高考书面表达]It is the first time that I have been a volunteer, so I am now receiving all the training involved.这是我第一次做志愿者，所以我现在正接受所有相关的培训。 7．It is/has been＋一段时间＋since...“自从……以来已经有多长时间了” It is already three months since he worked in this company, and now he still can't find a job.自从他离开这家公司以来已有三个月了，他现在还没有找到一份工作。 8．It is/was (about/high) time that...“是……的时候了” It is high time that you should make/made a decision. 该是你做出决定的时候了。 9．It goes without saying that...“不用说……” Therefore, it goes without saying that it is this proverb that brings me motivation and encouragement. 因此，不用说是这句谚语给我带来了动力和鼓励。 二、it作形式宾语及其他的常用句型 it除了可以作形式主语外，还可作形式宾语。it作形式宾语和在一些常用句型中的应用都可以提升文章的档次，使文章更高级。 1．动词＋it＋形容词/名词＋to do/doing/that从句(常见的动词有：find, feel, thi