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主谓要一致(谓语动词单复数受表语影响)

句子大全 2023-01-12 06:40:01
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记录典型问题 分享教学方法

S:学生 T:老师

S:老师,主系表结构中,系动词的单复数取决于表语吗?比如:

what I need___(be)time and money.

T:what引导的主语从句, 谓语动词一般用单数形式;

(但是,最讨厌的事情发生了,此处存在“如果”。)

如果从句后的表语是复数形式,或从句本身表示复数意义,则谓语动词宜用复数形式。

原理很简单:

A is B, 也可以说成B is A。

即:Time and money are what I need.

S: 所以说,系动词的单复数受表语名词的影响了。即:

What I need are time and money.

T: 类似情况,再比如:

When to hold the meeting and where to hold itare two things.

When and where to hold the meeting hasn’t been decided.

What you saidis right.

结论:

由and连接的不定式短语、动名词短语或从句作主语时,其谓语动词主要根据句子的单复数概念决定用单数还是复数。

S: 老师,另外一个问题:

all作主语,谓语动词的单复数也根据句意来定?

T:代词all, some, more, such等单独作主语时,根据其“指代意义”决定谓语动词的单复数。

比如:All goes well.一切进展顺利。

All are present. 所有人都到了。

Such is his answer.或

Such are his answers.

S:明白了!“意义一致”原则。

S: 还有,这个句子填is还是are?

We each ____(be) tired.

T: 此处each作主语we的同位语,主谓一致中,谓语动词不受其同位语的影响。

即:We each are tired.

但是若主语为each, 则谓语动词用单数。

即:Each of us is tired.

S: 明白!不定代词做主语,谓语动词用单数。

T: 主谓一致中,还有一种现象值得强调,即:单复数同形的名词作主语时,谓语动词的数取决于其前面的限定词。

单复数同形的名词, 比如:

means 方法;goods 商品、货物;

series系列; species 品种

All possible means have been tried.

A means of readinghas been found.

A series of plansis made by him.

The twoTV series are very popular.

练一练:

1.The following ___(be)her suggestion.

2.The following __(be)her suggestions.

3.There___(be)an effective means.

4.They each____(have)their own room.

5.To love and to be loved ____(be) a great happiness.

6.What I say and do___(be)none of your business.

S: 答案

1.is; 2. are; 3.is; 4. have; 5.is ;6.is.

本节课教与学心得体会:

学习的专精和用力,应筛选掉那些吸收时没有困惑,应用时也没有问题的知识。

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