一、 动词的时态
时态是表示动作或状态发生时间的动词形式。它告诉我们动作是发生在现在、过去还是将来,以及这个动作是正在进行、已经完成还是简单发生。
英语中主要有12种基本时态,可以通过以下时间(现在、过去、将来)和状态(一般、进行、完成、完成进行)的组合来理解。
1. 现在时态
-
一般现在时
-
形式: 动词原形(第三人称单数加-s/-es)
-
用法:
-
表示习惯性、经常性的动作。
-
I work every day.
-
He plays tennis on weekends.
-
-
表示客观事实或真理。
-
The sun rises in the east.
-
-
表示现在的状态或感觉。
-
I like coffee.
-
-
在时间或条件状语从句中,代替一般将来时。
-
If it rains tomorrow, we will stay home.
-
-
-
-
现在进行时
-
形式: am/is/are + 现在分词(动词-ing)
-
用法:
-
表示此刻正在进行的动作。
-
She is watching TV now.
-
-
表示现阶段正在进行的动作(但不一定是说话时正在进行)。
-
I am learning French these days.
-
-
表示即将发生的、计划好的事情(常用于位移动词)。
-
He is leaving for Beijing tomorrow.
-
-
-
-
现在完成时
-
形式: have/has + 过去分词
-
用法:
-
表示过去发生的动作对现在造成的影响或结果。
-
I have finished my homework. (结果是现在可以休息了)
-
-
表示从过去某时开始持续到现在的动作或状态,常与“for + 时间段”或“since + 时间点”连用。
-
He has lived here for ten years.
-
We have been friends since childhood.
-
-
-
-
现在完成进行时
-
形式: have/has been + 现在分词
-
用法: 强调从过去某时开始一直持续到现在的动作,这个动作可能刚刚结束,也可能仍在进行。
-
I have been waiting for you for two hours. (强调等待这个动作的持续性和耗时)
-
It has been raining all day.
-
-
2. 过去时态
-
一般过去时
-
形式: 动词的过去式(规则动词加-ed,不规则动词需记忆)
-
用法: 表示在过去某个特定时间发生的或存在的动作或状态。
-
I visited my grandparents yesterday.
-
He was a student ten years ago.
-
-
-
过去进行时
-
形式: was/were + 现在分词
-
用法:
-
表示在过去某一时刻或时段正在进行的动作。
-
At 8 p.m. last night, I was reading a book.
-
-
常用于描述故事发生的背景。
-
The sun was shining, and the birds were singing.
-
-
-
-
过去完成时
-
形式: had + 过去分词
-
用法: 表示“过去的过去”,即在一个过去动作之前就已经完成的动作。
-
When I arrived at the station, the train had already left. (“离开”发生在“到达”之前)
-
-
-
过去完成进行时
-
形式: had been + 现在分词
-
用法: 表示一直持续到过去某个时间点的动作,强调动作的持续性和过程。
-
He had been waiting for an hour when she finally arrived.
-
-
3. 将来时态
-
一般将来时
-
形式: will/shall + 动词原形;am/is/are going to + 动词原形
-
用法:
-
will/shall: 表示单纯的将来或主观预测。
-
I will call you later.
-
-
be going to: 表示计划、打算或有迹象表明要发生的事情。
-
Look at the clouds! It is going to rain.
-
-
-
-
将来进行时
-
形式: will be + 现在分词
-
用法: 表示在将来某一时刻正在进行的动作。
-
This time tomorrow, I will be flying to New York.
-
-
-
将来完成时
-
形式: will have + 过去分词
-
用法: 表示到将来某个时间点为止会已经完成的动作。
-
By next year, I will have graduated from university.
-
-
-
将来完成进行时
-
形式: will have been + 现在分词
-
用法: 表示动作从某一时间开始一直持续到将来某一时间,强调持续性。
-
By the end of this month, I will have been working here for five years.
-
-
二、 动词的语态
语态表示主语和谓语动词之间的关系,主要有两种:主动语态和被动语态。
1. 主动语态
主语是动作的执行者。
-
结构: 主语 + 谓语动词 + 宾语
-
例子:
-
The cat caught the mouse. (猫抓住了老鼠。)
-
She writes a letter. (她写信。)
-
2. 被动语态
主语是动作的承受者。当我们不知道或不关心谁是动作的执行者,或者想强调动作的承受者时,使用被动语态。
-
结构: 主语 + be + 过去分词 + (by + 执行者)
-
例子:
-
The mouse was caught by the cat. (老鼠被猫抓住了。)
-
A letter is written by her. (信是由她写的。)
-
被动语态在各种时态中的形式:
| 时态 | 主动语态 | 被动语态 |
|---|---|---|
| 一般现在时 | He writes the report. | The report is written by him. |
| 现在进行时 | He is writing the report. | The report is being written by him. |
| 现在完成时 | He has written the report. | The report has been written by him. |
| 一般过去时 | He wrote the report. | The report was written by him. |
| 过去进行时 | He was writing the report. | The report was being written by him. |
| 过去完成时 | He had written the report. | The report had been written by him. |
| 一般将来时 | He will write the report. | The report will be written by him. |
| 将来完成时 | He will have written the report. | The report will have been written by him. |
| 含情态动词 | He can write the report. | The report can be written by him. |
使用被动语态的注意事项:
-
不及物动词(如 happen, die, appear)没有被动语态,因为它们没有宾语。
-
被动语态的重点在于动作本身或动作的承受者,执行者(by短语)常被省略,尤其是当执行者不明确或不重要时。
-
My bike was stolen. (我的自行车被偷了。) —— 谁偷的不重要。
-
总结
-
时态:关注动作发生的时间和状态(一般、进行、完成)。
-
语态:关注主语是动作的执行者还是承受者。
将时态和语态结合起来,你就能准确地表达任何时间发生的任何动作,并能灵活地切换句子的焦点。多读多练是掌握它们的最好方法。