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2020-03-05
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初中英语单词速记软件哪家好,选了4款最管用的单词软件送给你!
2020-03-05
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2020-03-05
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2020-03-05
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乌鲁木齐小学英语三年级下载英语快速记单词,有趣的单词记忆法,今天教给你
2020-03-05
更新时间:2020-03-05浏览:次评论: 条
2020-03-05
初中英语单词速记软件哪家好,选了4款最管用的单词软件送给你!
2020-03-05
2020-03-05
2020-03-05
乌鲁木齐小学英语三年级下载英语快速记单词,有趣的单词记忆法,今天教给你
2020-03-05
考点一 动词不定式
动词不定式的构成: to+动词原形。它没有人称和数的变化。
1.作主语[常用it作形式主语、将真正的主语(动词不定式)置于句末。]
To ask the teacher for help is necessary.
=It is necessary to ask the teacher for help.
向老师求教是必要的。
2.作宾语
(1)后接不定式作宾语的动词有: want, try, decide, hope, need, wish, agree, expect, refuse, learn,remember,forget, would like/love等。如:
I hope to go there before dark.
我希望天黑以前到那儿。
(2)在think, find, make等动词后通常用it作形式宾语,而把不定式移至形容词之后,构成“主语+动词+it(形式宾语)+宾补(形容词/名词)+不定式”结构。如:
I found it difficult to solvethe problem.
我发现解决这个问题很难。
3.作宾语补足语
(1)后面能接带to的不定式作宾补的动词有:tell,ask,allow,want,help,wish,teach,warn,invite,like,encourage等。如:
The teacher told us to do Exercise1.
老师要我们做练习一。
(2)有些动词后要用不带to的动词不定式作宾补。但是,当上述动词变为被动语态后,其后的不定式必须补上to。
那么能接省略to 的不定式做宾补的动词有:
三使:have, make, let
四看:look at, see, watch, notice
二听:listen to, hear
一发现:find
一感觉:feel
如:We often hear her sing. 我们经常听见她唱歌。
被动语态: She is often heard to sing.
4.作状语( 表目的)
I get up early to catch the early bus.
后来他离开家到不同的城市工作。
5.作定语(须后置)
(1) 不定式和所修饰的词构成动宾关系。
I have a lot of clothes to wash.
其中不定式to wash 和clothes 构成动宾关系。(
(2)如果不定式中的动词是不及物动词,则其后要加上相应的介词。
I have no room to live in.
若所修饰的名词是time, place, way时,通常省略。
We are looking for a place to live.
6.作表语
Their duty is to look after theanimals.
他们的职责是照看动物。
7. “疑问词+不定式”结构
动词不定式可以和疑问词what, which, when, where, how等连用,构成不定式短语,在句中作主语、宾语、表语、宾语补足语等。如:
He doesn't know what to wear.
他不知道要穿什么。(作宾语)
Where to go has not been decided.
要去哪里还未决定。(作主语)
[注意] 动词不定式的否定结构是: not to do sth。
被动语态
一.语 态 分 类
英语动词有两种语态.,主动语态和被动语态。主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者。如:
They will build a new bridge over the river. (主动)
A new bridge will be built over the river. (被动)
二.被动语态谓语部分构成
助动词be + 及物动词的过去分词构成。
三.被动语态的各种时态
一般地讲,被动语态可用于英语的各种时态。为了能准确地运用被动语态,重点是要掌握be动词的各种时态变化。各种时态的被动语态举例如下:
1、一般现在时的被动语态. am / is / are + 动词的过去分词
Our classroom is cleaned every day.
This car is made in China.
2、一般过去式的被动语态: was / were + 动词的过去分词
His desk was cleaned just now.
The station was built in 1928.
3、现在进行时的被动语态: am / is / are + being + 动词的过去分词
A new factory is being built in our city now.
Some trees are being cut down in the park.
4、过去进行时的被动语态: was / were + being + 动词的过去分词
A new factory was being built in our city at that time.
Some babies were being looked after by Miss Chen last year.
5、一般将来时的被动语态:
(A) will / shall + be + 动词的过去分词
(B) am / is/ are + going to be +动词的过去分词.
Some new factories will be built in our city this year.
Your watch is going to be mended in an hour.
6、过去将来时的被动语态:
(1).would / should + be + 动词的过去分词
(2).was / were +going to be + 动词的过去分词.
She said that some new factories would be built soon in our city.
He thought that your watch was going to be mended after an hour.
7、现在完成时的被动语态:have / has + been + 动词的过去分词
Some new factories have been built in the city since last year.
Your watch has been mended already.
四. 含有情态动词的被动语态:
含有情态动词的被动语态是由“情态动词+ be+ 及物动词的过去分词”构成。
(1)You must hand in your compositions(作文) after class.
Your compositions must be handed in after class.
五.不及物动词没有被动语态,如:rise, happen, succeed, remain, lie等。
一些不及物动词短语也没有被动语如:take place, break out, belong to, lose heart, consist of, add up to等。
The fire broke out in the capital building.
误:The fire was broke out in the capital building.
六.感官动词作系动词用,无被动语态
The cake smells nice.
主动语态改被动语态的方法
一.三步骤
1.把主动语态的宾语变成被动语态的主语。
2.把主动语态的谓语变成被动语态的“be+过去分词”结构;时态要与原句保持一致。
3.将主动语态的主语改为介词by之后的宾语,放在谓语动词之后(有时可省略)。如果原句主语是地点名词,在被动语态中用in + 地点名词作状语。
二.含直接宾语和间接宾语的主动语态改为被动语态时有两种情况:
1. 把间接宾语改为被动语态的主语,直接宾语仍保留原位;
He gave the boy anapple.
→The boy was givenan apple.
2. 把直接宾语改为主动语态的主语,此时,间接宾语前要加介词to或 for。
He gave the boy anapple.
→An apple wasgiven to the boy.
Her father bought hera present.
→ A present wasbought for her by her father.
(注:一般在下列动词后,常在间接宾语前用介词 to,如:
bring, give, hand, lend, offer, pass, pay, promise, sell, show, take, teach, tell 等。
下列动词后,间接宾语前用介词 for, 如:
build, buy, cook, cut, choose, do, fetch, find, fix, get, keep, make, order, paint, play, sing 等。)
三. 带复合宾语(宾语+ 宾补)的动词改为被动语态时,一般把主动结构中的宾语改为主语,而宾语补足语保留在谓语动词后面。
We call him Xiao Wang.
→He is called XiaoWang.
He cut his hair short.
→His hair was cutshort.
They told him to helpme.
四.在see, watch, hear, notice, listen to, look at, make, feel等动词后作宾语补足语的动词不定式都不带 to,但改成被动语态后都带to。
We often hear him play the guitar.
→He is often heard to play the guitar.
They watched thechildren sing that morning.
→The children werewatched to sing that morning
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