英语有哪八大时态？
一、一般现在时
1.表经常发生的事情、存在的动作或状态
eg She sings with the band Crazy Boy.
2.表内心活动感情等
eg I don't think you are right.
3.描述客观真理
eg Birds fly in the sky.
4.表预定的行为
eg The train leaves at 9.
二、一般过去时
1.表过去发生的事情或存在的状态
eg Suddenly,the clouds cleared and the rain stopped.
2.表过去经常发生的事情
eg I was very thin in my childhood.
3.带有确定的过去的时间状语
eg Did you meet yesterday? He left just now.
三、一般将来时
1.要在将来的某个时间内发生，是“纯粹的将来动作”。
eg I shall / will not be free tomorrow.
2.表说话人的意图、打算或某种可能性
eg Who is going to speak first?
3.按计划要发生的动作或命令他人做某事
eg The new bridge is to open to traffic in 3 days.
四、现在进行时
1.说话、写文章的当刻正在发生的动作
eg They are having a football match.
2.现阶段一直在进行的动作
eg He is preparing for CET Band Six.
3.表示说话人的情感，如赞许、批评等
eg She is often doing well at school.
4.表示在近期按计划或安排要发生的动作
eg Are you staying here till next week?
五、过去进行时
1.表示在过去某时刻正在进行的动作
eg At this moment yesterday, I was packing for camp.
2.用于故事的开头，交代故事发生的背景情况
eg One night, he was typing in his study . Suddenly , a man broke …
3.表示在过去的未来时间要发生的动作
eg We left there when it's getting dark.
六、过去完成时
1.发生在“过去的过去”
eg When I woke up, it had stopped raining.
2.与一个表示过去的时间状语连用
eg Peter had collected more than 300 Chinese stamps by the time he was ten.
3.在过去某时之前开始一直延续到这一时间
eg By the end of last year, he had worked in the factory for twenty years.
七、现在完成时
1.表示截止现在业已完成的动作
eg By now, I have collected all the data that I need.
2.表示发生在过去而对现在产生影响、带来结果的动作
eg She has been to the United States.
3.表示过去发生的动作持续到现在，并可能还要延续
eg I have learned English for 8 years.
八、过去将来时
1.宾语从句或间接引语中
eg He didn't expect that we would all be there.
2.表示过去习惯性的动作
eg During that period, he would do this every day.
3.表示过去的愿望、倾向，多用于否定句
eg They knew that we would never permit such a thing.
参考资料
1、一般现在时
2、一般过去时
3、一般将来时
4、现在进行时
5、过去进行时
6、过去将来时
7、现在完成时
8、过去完成时
一、一般现在时：
基本结构：①动词原形 ②主语三单：动词原形+s/es
三种常考基本用法：1、经常性和习惯性动作
Eg. I always get up early.
2、客观事实和普遍真理
Eg. The earth goes around the sun.
3、在时间状语从句及条件状语从句中，一般现在表将来
If it doesn't rain, we will have a picnic.
其中，第三种用法就是学生们熟知的"主将从现"的原则，这一点大家务必掌握，此知识点会在初二学习，同时也是中考重要考点。
常见时间状语：
always, usually, often, sometimes, every day, on Sundays, at weekends, once a week, twice a month, etc.
二、一般过去时：
基本结构：动词的过去式
基本用法：
1、过去某个时间里发生的动作或状态
Eg. I got up late yesterday.
2、过去习惯性、经常性的动作
Eg. When I was in the countryside, I often swam in the river.
常见时间状语：ago, yesterday, the day before yesterday, last week (year, night, month…), in 1986, just now, at the age of 10, at that time, once upon a time, etc.
三、一般将来时：
基本结构：①am/is/are/going to + do;②will/shall + do.
基本用法：
am/is/are/going to + do
1、(人)计划打算做某事
Eg. I'm going to go shopping with my mom tomorrow.
2、(事)即将发生
Eg. Look at the clouds, it's going to rain.
will/shall do
1、将来的动作和状态(相对较长远)
Eg. You'll have your own house in the future.
2、礼貌询问、客气邀请
Eg. Will you go with me?
3、意愿
Eg. I will do it for you.
常见时间状语：tomorrow, next day (week, month, year…), soon, the day after tomorrow, in+时间段(格外注意)，etc.
四、现在进行时： 基本结构：am/is/are+现在分词
基本用法：1、此时此刻正在进行的动作
Eg. I am writing a letter now.
2、现阶段正在进行的动作
Eg. I am reading a book these days.
常见时间状语：now, at this time, these days, etc.
五、过去进行时：
基本结构：was/were+现在分词
基本用法：1、过去某时刻正在进行的动作
Eg. He was playing computer games when his father came home.
2、过去某时段正在进行的动作
Eg. He was doing his homework while his mother was cooking.
常见时间状语：at this time yesterday, at that time或以when引导的谓语动词是一般过去时的时间状语等。
六、过去将来时：
基本结构：①was/were/going to + do;②would/should + do.
基本用法：从过去时间点看将来，常用于宾语从句中。
Eg. He said that he would marry her.
常见时间状语：the next day (morning, year…), the following month (week…), etc.
七、现在完成时：
基本结构：have/has + 过去分词
基本用法：
1、过去发生的动作对现在造成的影响或结果
Eg. I have finished my homework.
2、过去已经开始，持续到现在的动作或状态
Eg. We have waited for her for 2 hours.
常见时间状语：recently, lately, so far, up to now, since+时间点，for+时间段, in the past few years, etc.
现在完成时是考试中的重点也是难点，同学们需要格外加强。特别注意瞬间动词和延续性动词的转化问题。
八、过去完成时：
基本结构：had + 过去分词
基本用法：以过去某个时间为标准，在此以前发生的动作或行为，即"过去的过去"。
Eg. Just before the English class, I suddenly realized that I had left my English textbookat home.
