高一英语必修一知识点归纳 『范文1』
各种时态的被动语态
被动语态概述
被动语态的概念:它是动词的一种形式,表示主语与谓语之间的执行或被执行关系。主动语态表示主语是谓语动作的执行者,例如:They saw the little boy crying by the river. 被动语态表示主语是谓语动作的承受者,例如:The little boy was seen crying by the river.
被动语态的构成
被动语态的形式是由“助动词be+动词的过去分词”构成。助动词be随着主语的人称、数、时态等的不同而变化。几种常见时态的被动语态形式如下:
1、 一般现在时 am/is/are + 过去分词
例如:Rice is planted in the south of China.
2、 一般过去时 was/were + 过去分词
例如:These trees were planted the year before last.
3、 一般将来时 will/shall + be + 过去分词
例如:A sports meeting will be held next week in our school.
4、 现在进行时 am/is/are + being + 过去分词
例如:Your radio is being repaired now.
5、 过去进行时 was/were + being + 过去分词
When he got there, the problem was being discussed.
6、 现在完成时 have/has + been + 过去分词
His work has been finished.
Has his work been finished? Yes, it has. / No, it hasn’t.
7、 过去完成时 had + been + 过去分词
注意:
1、除了be之外的其它系动词如get, stay等也可以和过去分词构成被动语态。例如:Their questions haven’t got answered.
2、 含有情态动词的谓语变成被动语态使用“情态动词+ be + 过去分词”结构。例如:
More attention should be paid to the old in this country.
This work can’t be done until Mr. Black comes.
3、 含有“be going to”, “be to”等结构的谓语,其被动语态分别用“be going to + be + 过去分词”和“be to + be + 过去分词”。例如:
The problem is going to be discussed at the next meeting.
All these books are to be taken to the library.
4、 被动语态与系表结构的区别:“连系动词+用作表语的过去分词”构成的系表结构,与被动语态的形式完全一样,所以应注意它们的区别。被动语态中的过去分词是动词,多强调动作;系表结构中的过去分词相当于形容词,多强调状态。前者通常可用by 引出动作的执行者,而后者则不可以。例如:
The map was changed by someone.(被动结构)
That custom remained unchanged for many centuries.(系表结构)
系表结构中的过去分词通常可被very修饰,被动语态中的过去分词往往要用much修饰。
例如:
He was very excited.(系表结构)
He was much excited by her words.(被动结构)
5、 主动形式表被动意义。有些动词的主动形式有被动意味,如 open, read, sell, shut, wash, wear, write等。此时句子的主语一般是物。例如:
These books sell well. 这些书很畅销。
The door won’t shut. 这门关不上。
The clothes wash well. 这些衣服很好洗。
高一英语必修一知识点归纳 『范文2』
as 可作关系代词,引导定语从句。
1.as
as可以在限制性定语从句和非限制性定语从句中作主语或宾语。
① 在限制性定语从句中,as可跟在由suc, so, the same修饰的先行词之后。
Such men as heard him were deeply moved. 听过他说话的人,都会深受感动。(as在定语从句中作heard的主语)
I've never heard such stories as he tells. 我从未听过像他讲的这样的故事。(as在定语从句中作tell的宾语)
He lifted so heavy a stone as no one else can lift. 他搬起别人都搬不起的大石头。(as在定语从句中lift的宾语)
比较:
在the same