英语外研版 (2019)Unit 4 Breaking boundaries课后作业题

这是一份英语外研版 (2019)Unit 4 Breaking boundaries课后作业题，共4页。试卷主要包含了作形式主语替代主语从句，作形式主语替代不定式短语，作形式主语替代动名词短语等内容，欢迎下载使用。
一、作形式主语替代主语从句
观察
1.It is quite certain that he will be at the meeting.
2.It is imprtant that we（shuld）think befre we decide.
3.It is a pity that yu missed the sprts meeting last week.
4.It is reprted that 16 peple were killed in the earthquake.
5.It is required that the students（shuld）learn a freign language.
6.It seems that they knw what they’re ding.
归纳 It替代主语从句作句子主语，主语从句后置。
常见的句型有：
（1）“It+be+形容词+that从句.”可用于此句型的形容词有 wnderful、true gd、right、wrng、Imprtant、surprising clear、certain、necessary等。需要注意的是，当形容词是imprtant、necessary等时，从句要用1._______，谓语动词用shuld+动词原形”，shuld可以省略。
（2）“It+be+名词（词组）+that从句”适用该句型的名词（词组）有 a pity，an hnur、a gd thing，a fact、a surprise等。
（3）“It+be+过去分词+that从句”适用该句型的过去分词有 annunced、believed，expected、hped、decided、reprted、 said、shwn等。需要注意的是，当过去分词是 suggested、required、rdered等时，从句要用2._______，谓语动词用“shuld
+动词原形”，shuld可以省略。
（4）还可用于“It seems/appears+that从句.”句型中。
二、作形式主语替代不定式短语
观察
1.It is brave f the dctrs and nurses t save peple infected with the crnavirus.
2.It is imprtant (fr yu) t remember that Ebla desn’t respect natinal bundaries.
3.But it is vital（fr yu）nt t take any chances.
归纳 （1）It is kind（brave/flish/… sb.）t d sth.不定式的逻辑主语是由f引出的，句中的形容词必须是能表示逻辑主语特征的褒义或贬义形容词。
（2）It is necessary（imprtant/vital/…4.______ sb.）t d sth.不定式的逻辑主语是由fr引出的，句中的形容词通常是表示重要性、紧迫性、频繁程度等情況的形容词。
三、作形式主语替代动名词短语
观察
1.It is n gd/n use learning English withut speaking English.
2.It's useless trying t argue with Shylck.
3.It’s a waste f time talking t her any mre.
归纳 It作形式主语，可以替代后面的动名词短语。常用于“It+be+名词或形容词+动名词短语.”句式中，这类名词和形容词常常是gd、5._____、6._____、a waste f time、senseless、7、______等。
链接高考
单句语法填空
1.（2017江苏，阅读理解D，★★☆）When it cmes t adaptatin，it is imprtant
__________（understand）that climate change is a prcess.
2.（2017浙江，阅读理解A，★★☆）While it’s likely ______ he understd very little f the bks they were his intrductin t classical paintings.
3.（2016课标全国I，语法填空，★★☆）S It was a great hne ______ (invite) backstage at the nt-fr-prfit Panda Base where ticket mney helps pay fr research.
句型转换
4.、（2020浙江1月，阅读理解A改编，★★☆）That yu'd read every wrd in the bk and needed anther t start made n difference t her.
→_____ _____ _____ _____ t her that yu'd read every wrd in the bk and needed anther t start.
5.（★★★）It is reprted that a space statin will be built n the mn in years t cme. →A space statin _____ _____ _____ _____ _____ n the mn in years t cme.
6.（★★☆）It is said that bdy language accunts fr 55 per cent f a first impressin while what yu say just 7 per cent.
→ Bdy language _____ _____ _____ _____ _____ 55 per cent f a first impressin while what yu say just 7 per cent.
7.（★★★）Keep in mind that t waste fd is a shame
→ Keep in mind that _____ _____ _____ _____ _____ _____ _____.
8.（★★☆）Crying ver spilt milk is f n use.
→_____ _____ _____ _____ _____ ver spilt milk.
完成句子
9.（2018北京，阅读理解D，★★☆）很难预测无人驾驶汽车什么时候会遍布我们的道路上的各个地方。
_____ _____ _____ _____ when driverless cars will be everywhere n ur rads.
10.（2018天津，8，★★☆）他花了很长时间掌握成为一名优秀舞蹈家所需要的技能。
_____ _____ _____ _____ _____ _____ t acquire the skills he needed t becme a gd dancer.
答案：
1.虚拟语气2.虚拟语气3.f 4.fr 5.n gd
6.n use7. useless
1.t understand考查非谓语动词。句意：当提到适应时，了解气候变化是一个过程很重要。第二个it为形式主语，t understand..真正的主语。
2.that考查名词性从句。句意：虽然他可能对这些书了解甚少，但它们是他对古典绘画的初次接触。it为形式主语，that引导的从句为真正的主语。由于从句结构完整，句意完整，因此使用that。
3.t be invited考查非谓语动词。it为形式主语，t be invited..真正的主语。
4.It made n difference
5. is reprted t be built
6. is said t accunt fr
7.it is a shame t waste fd
8.It is n use crying
9.It's hard t predict
10.It tk him a lng time