2020届一轮复习人教版必修三Unit4Astronomy-the science of star(9)

Who will go to the concert is not known.

不知道谁会去听音乐会。

Whatever you do in your spare time should do no harm to others. 无论你在业余时间做什么都不应该伤害其他人。 [名师点津] who 引导的主语从句表示一件“事情”，而whoever引导的主语从句指“人”。 3．连接副词(when, where, how, why等)

连接副词引导主语从句并在从句中作状语。 How this happened is not clear to anyone.

这件事怎样发生的，谁也不清楚。

When we will have a meeting is an important question. 我们何时举行会议是个重要的问题。

Where I spend my summer is no business of yours.

我在哪里过暑假不关你的事。

[名师点津] 名词性从句引导词的确定步骤：

(1)分析句式结构，明确名词性从句在句中的功能； (2)明确名词性从句所表达的意义；

(3)明确名词性从句中所需要的成分及意义； (4)确定从句的引导词。

[即时演练2] 用适当的连接代词或连接副词填空 ①How it was done was a mystery.

②Why John was late for the class has been unexplained.

③Which part of the country he will travel to needs discussing.

④Where/When the English evening will be held has not yet been decided. ⑤What surprises me most is that he is too proud.

⑥Whoever is interested in the activity can sign your names. 三、主语从句中用it作形式主语的结构

1．It＋be＋形容词(obvious, true, natural, strange, etc.)＋主语从句 It is important that he should know about this. 他应该知道此事是重要的。

[名师点津] 在“It＋be＋形容词＋主语从句”结构中，若形容词为important/necessary/strange等，主语从句中的谓语用“(should) do”。

2．It＋be＋名词词组(no wonder, an honour, a pity, a/no surprise, etc.)＋主语从句 It's a pity that he didn't come. 很遗憾他没来。

3．It＋be＋过去分词(said, reported, thought, expected, proved, etc.)＋主语从句 It is suggested that the meeting be put off. 有人建议会议延期召开。

[名师点津] 在“It＋be＋过去分词＋主语从句”结构中，过去分词若为suggested/ordered/required/advised等，主语从句中的谓语用“(should) do”。 4．It＋不及物动词(happen, seem, appear, remain, etc.)＋主语从句 It seems that it is going to rain. 看起来好像要下雨。

5．It＋及物动词＋宾语＋主语从句

It surprised him why they came to visit him suddenly.

让他吃惊的是他们为什么突然都来看他。

[即时演练3] (1)补全句子

①It's_a_pity that you can't attend my birthday party. 很可惜你不能参加我的生日聚会。

②It's_suggested that the old man (should) go to the countryside to have a rest. 建议这位老人到乡村休息一下。

③It_seems_that you disagree with the plan. 你好像不赞成这个计划。

④It is doubtful whether_she_will_be_able_to_come_to_the_party. 她是否能来参加聚会还很难说。

⑤It_happened_that the harvest was bad that year. 碰巧那年收成不好。 (2)句型转换(每空一词)

①That he suddenly fell ill last month surprised us. →It surprised us that he suddenly fell ill last month.

②Whether they will sell the house hasn't been yet decided. →It hasn't been decided yet whether they will sell the house. ③That light travels in straight lines is known to us all. →It is known to us all that light travels in straight lines. 四、主语从句中应注意的问题 1．从句要用陈述语序

What we will do next should be decided.

应该决定一下我们下一步该做什么。 2．主谓一致

(1)从句作主语时，主句的谓语一般用单数形式。

Where he will get a job after graduation has puzzled him much. 毕业后到哪儿找份工作使他很困惑。

[名师点津] what引导主语从句时，有时主句谓语动词应与主句中作表语的名词保持一致。 What the school needs most are books.

这所学校最需要的是书。

(2)如果由and连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或多个连接词引导一个主语从句时，谓语动词用单数。

When they will start and where they will go have not been decided yet. 他们将在什么时候动身以及要去哪里还没定下来。 When and where the movie will be shown is not clear. 这部影片何时何地上映还不清楚。

[即时演练4] 用所给词的适当形式填空

①What surprised me most was (be) that the man in rags was a millionaire. ②What he needs most is (be) money. …… 此处隐藏：1174字，全部文档内容请下载后查看。喜欢就下载吧 ……