A. 英语语法16时态，及例句！谢谢
英语的时态是靠动词的变化和时间状语来表达的。英语中的时态共有十六种，但是常考的或较常用的只有8种，而且重点测试完成时态。 要掌握英语的时态和语态，必须掌握好英语中的助动词(do, be, have)和时间状语这两个核心问题。
1、一般现在时
主要用来表示人、事物的现在状况和特点；表示经常或习惯性的动作，句子中常有often, always, from time to time 等时间状语； 表示客观规律和永恒真理等。
He usually goes to work at 7 o’clock every morning.
She has a brother who lives in New York.
The earth goes around the sun.
Guangzhou is situated in the south of China.
考点一：表示永恒的真理，即使出现在过去的语境中，仍用一般现在时。如：
I learned that the earth goes around the sun when I was in primary school.
考点二：在时间和条件状语从句中，代替一般将来时；常用的引导词有：
时间：when, until, after, before, as soon as, once, the moment/the minute, the day; 条件：if, unless, provided.
If he accepts the job, he will get more money soon.
考点三：在make sure (certain), see to it, mind, care, matter ＋宾语从句， 从句用一般现在时代替一般将来时。
So long as he works hard, I don’t mind when he finishes the experiment.
只要他努力工作， 我不介意他什么时候做完试验。
考点四：在the more… the more … (越……越……) 句型中, 若主句是一般将来时, 从句通常用一般现在时。
The harder you study, the better results you will get.
2、现在进行时
表说话时或目前一段时间内正在进行的活动：或表感情色彩，加强语气。与频率副词，如always，constantly，continually，again等连用表示说话人的某种感情色彩（赞叹、厌烦、埋怨等）。
We are having English class.
The house is being built these days.
The little boy is always making trouble.
考点一：在时间状语或条件状语从句中表示将来正在进行的动作。
Look out when you are crossing the street.
Don\'t wake him up if he is still sleeping at 7 tomorrow morning.
考点二： 表示在最近按计划或安排要进行的动作（这时多有表示将来的时间状语）。
Marry is leaving on Friday.
3、现在完成时
表示动作发生在过去，完成在过去，但强调与现在情况仍有联系，其结果或影响仍存在。现在完成时有一些标志性的时间状语：
考点一：for + 时间段；since + 时间点
They have lived in Beijing for five years.
They have lived in Beijing since 1995.
I have learned English for ten years.
考点二：常见的不确定的时间状语：lately; recently, just, already, yet, up to now; till now; so far, these days,
Has it stopped raining yet?
考点三：在表示“最近几世纪/ 年/ 月以来……”时间状语中，谓语动词用现在完成时。
in the past few years/months/weeks/days；over the past few years; ring the last three months; for the last few centuries, through centuries; throughout history 等
考点四：表示“第几次做某事，”或在 “It is the best (worst, most interesting ) +名词 ＋that” 后面跟现在完成时。
This is my first time that I have visited China.
This is the most interesting film I have ever seen.
That is the only book that he has written.
4．一般过去时
表在过去某个特定时间发生且完成的动作，或过去习惯性动作，不强调对现在的影响，只说明过去。常跟明确的过去时间连用，如：yesterday; last week; in 1945, at that time; once; ring the war; before; a few days ago; when, 注意：
考点一：used to + do，表示过去经常但现在已不再维持的习惯动作。to为不定式，后接动词原形。
be/become/get used to + doing，表示习惯于
He used to smoke a lot.
He has got used to getting up early.
考点二：在时间和条件状语从句中，代替过去将来时。
He promised to buy me a computer if he got a raise
5. 过去进行时
表示过去某个时间点或某段时间内正在发生的动作。
The boy was doing his homework when his father came back from work.
He was taking a walk leisurely by the lake when he heard someone shouted for help.
What were you doing at nine last night?
The radio was being repaired when you called me.
6. 过去完成时
表示过去某个时间之前已经完成的动作，即过去完成时的动作发生在“过去的过去”，句中有明显的参照动作或时间状语，这种时态从来不孤立使用 ( before, after, by, up till )
There had been 25 parks in our city up till 2000.
By the end of last term we had finished the book.
They finished earlier than we had expected.
考点一：用于hardly/scarcely...when; no sooner ...than 句型中，主句用过去完成时，从句用一般过去时。
I had hardly finished my work when he came to see me.
I had no sooner got into the room than it began to snow.
No sooner had I arrived home than the telephone rang. （注意主谓倒装）
考点二：表示“第几次做某事”，主句用过去时，从句用过去完成时。
That was the second time that she had seen her grandfather.
It was 3 years since we had parted。
考点三：动词hope, expect, think, intend, mean, want, suppose, plan 用过去完成时，表示未实现的愿望、打算和意图。
I had hoped that I could do the job.
I had intended to see you but I was too busy.
7. 一般将来时
表在将来某个时间会发生的动作或情况。常和tomorrow, next year, in 2008等表示将来的时间状语连用，其表现形式多达5种。
Beijing will host the 29th Olympic Games in 2008.
考点一：一般将来时总是用在一些时间状语从句或条件状语从句的主句中：
We will begin our class as soon as the teacher comes.
（主句用一般将来时，从句中一定要用一般现在时替代一般将来时。）
考点二：某些表示短暂性动作的动词如arrive, come, go, leave, start等，用现在进行时形式表示将来。
I am leaving for Beijing tomorrow.
考点三：“祈使句 + and/or + 句子”，这种结构中and后面的句子谓语用一般将来时。
Use your head and you will find a way.
考点四：“am (is, are) going to + 动词原形”，表示打算要做的事或可能要发生的事。
“am (is, are) about to + 动词原形”表示按照预定计划或打算准备着手进行的动作。
“am (is, are) to + 动词原形”表示必须、必然或计划将要做的事。
They are to be married in this May.
8、将来进行时
表将来某个时间正在发生的动作，或按计划一定会发生的事情。
I’ll be doing my homework this time tomorrow. 明天这会我正在写作业。
The President will be meeting the foreign delegation at the airport.
9、将来完成时
表在将来某时刻之前业已完成的事情，时间状语非常明显。
考点一：常用的时间状语一般用by+将来的时间。如：by the end of this year, by 8 o’clock this evening, by March next year以及由by the time…, before或when等引导的副词从句。
By the end of next month, he will have traveled 1000 miles on foot.
By the time you reach the station, the train will have left.
By next Tuesday, I will have got ready for the exams.
考点二：在时间和条件状语从句中，将来完成时则由现在完成时表示。
The children will do their homework the moment they have arrived back from school.
B. 英语语法：一个英语句子的时态问题
你好。可以来这样理解：aren't biting 只是强调自此时此刻 not bite，不代表以後也不bite.
如果用了won't bite，就说明，不管你怎麼努力，它们都不会bite。如果早知道won't bite，说话人就不出来catch fish了。还有，你不能根据翻译-----今天鱼儿就是不咬钩-----来理解英语。翻译的目的是让你尽可能容易地理解句子，但不能取代英语原句。
例句：
1 She is not coming today. Just come again and see her tomorrow.
2 Strange! Mr. White is driving (by) himself。 He usually has his driver take him when he wants to go out.
C. 求英语语法时态公式，简单明了即可
这里的have
been
married是be
married的现在完成时形式，不是marry的现在完成时的被动语态。
在本句中不能用marry的被动语态形式来与for
20n
years连用。
D. 求英语所有时态的语法
答：
英语中有16种时态。很好记，4X4=16.
就是4种时间X4种状态=16种时态。
这4种时间是：现在、过去、将来和过去将来。
这4种状态是：一般、进行、完成和完成进行。
以do为例，给你列个表格：
时间X状态 一般 进行 完成 完成进行
现在 does/ do am/is/are doing has/have done has/have been doing
过去 did was/were doing had done had been doing
将来 shall/will do shall/will be doing shall/will have done shall/will have been doing
过去将来：would do would be doing would have done would have been doing
至于它们的用法，网上有详细的解说，有例句，自己去看。也有TX为你准备好了。那都是网上来的。
E. 英语语法时态问题
一般情况下，定语从句的关联词（关系代词、关系副词）必须紧跟先行词（被修饰的词）。在回第三答句中，“questions”明显是先行词，复数，所以 “that” 也是复数，答案是 “c”，用“have”。
诚然有时也会看到先行词与关联词脱节的情况，这时就需要用意思或逻辑思维来判断了。
后来美式英语韦氏语法比较好的解决了这难题，引用他们的例句：
I place the book on the table, which I have just bought today.
可以看到，当先行词 “book” 被一些词隔开时，定语从句前加逗号 “，”，如果不加“，”，先行词变成 “table”，意思变了：
I place the book on the table which I have just bought today.
供你参考。
F. 英语语法时态
they 与 them 要分清，来they 一般用作主语，源放在句首，them做宾语，放在动词后面。
原句 They are waiting for you (at the library) .可看出they在句中做主语，因此提问时不能用them。
看看这个例子：Are you waiting for them？你在等他们吗？
谓语动词是除开be动词以外的其他所有行为动词的一般现在时变疑问句时用do，如果是第三人称单数，用does。当谓语动词是be或把be当助动词时就用be了。
比较一下这两个句子：
Are you running?你正在跑步吗？
Do you like running?你喜欢跑步吗？
be going to do 是指去做某事
be going to someplace（sp.） 是指去某地方
be going to sp. to do sth. 去某地做某事
G. 英语时态语法
He kept the door closed 指的是说话以前他让门保持着关闭的状态，所以要用过去时态。