初中英语语法

Question

要人教版的 ，比如什么现在进行时啊 过去进行时 现在将来时什么的

谢谢

Answer 1

一般过去时 Ved
一般将来时 Be going to + V / Will + V
过去将来时 Be的过去时 going to +V/ Would +V
现在进行时 Be +doing
过去进行时 was/were doing/ was /were not doing
将来进行时 Will +be+doing/ will not be doing
现在完成时 have +done/ have not done
过去完成时 Had+done/ had not done
现在完成进行时 have/has been doing/ have has not been doing
过去完成进行时 had been doing/ had not been doing

一、一般时态

1、一般现在时

(1)一般现在时表示没有时限的持久存在的动作或状态或现阶段反复发生的动作或状态，常和副词usually，often，always sometimes， regularly，near，occasionally，every year, every week等连用。例如：

1)The moon moves round the earth..

2)Mr. Smith travels to work by bus every day.

(2)在由after，until，before，once，when，even if，in case，as long as，as soon as，the moment以及if，unless等引导的时间状语从句或条件状语从句中，通常用一般现在时代替将来时。例如：

1)I will tell him the news as soon as I see him.

2)I will not go to countryside if it rains tomorrow.

(3)某些表示起始的动词，可用一般现在时表示按规定、计划或安排要发生的动作，这类动词有：be，go，come，start，depart，arrive，begin，leave等。例如：

1)The plane leaves at three sharp.

2)The new teachers arrive tomorrow.

(4)在由why，what，where，whoever，who，that，as等引导的从句中，也常用一般现在时代替将来时。例如：

1)Free tickets will be given to whoever comes first.

2)You’ll probably be in the same train as I am tomorrow.

2.一般过去时

(1)表示过去某一特定时间所发生的、可完成的动作或状态，常与表示确切过去时间的词、短语或从句连用。例如：

We went to the pictures last night and saw a very interesting film.

(2)表示过去习惯性动作。例如：

1)He always went to class last.

2)I used to do my homework in the library.

(注意与be used to doing短语的区别)

3.一般将来时

1)表示将来打算进行或期待发生的动作或状态。例如：

I shall graduate next year.

2)几种替代形式：

1)be going to +v在口语中广泛使用，表示准备做或将发生的事情。例如：

I’m going to buy a house when we’ve saved enough money.

2)be to +v表示计划安排要做的事，具有“必要”的强制性意义。例如：

I am to play tennis this afternoon.

3)be about to +v表示即将发生的事情。例如：

He was about to start.

4)be due to +v表示预先确定了的事，必定发生的事。例如：

The train is due to depart in ten minutes.

5)be on the point/verge of +v – ing强调即将发生的某种事态。例如：

The baby was on the point of crying when her mother finally came home.

二、进行时态

1.现在进行时

(1)表示现在正在进行的动作，常与now，right now，at the mother，for the time being，for the present等连用。例如：

Don’t disturb her. She is reading a newspaper now.

(2)表示现阶段经常发生的动作，常与always，continually，forever，constantly等连用。例如：

My father is forever criticizing me.

(3)表示根据计划或安排在最近要进行的事情。具有这种语法功能的动词仅限于过渡性动词。即表示从一个状态或位置转移到另一个状态或位置上去的动词。常用的有：go，come，leave，start，arrive，return等。例如：

They are leaving for Hong Kong next month.

(4)有些动词不能用进行时，这是一类表示“感觉，感情，存在，从属”等的动词。如：see，hear，smell，taste，feel，notice，look，appear，(表示感觉的词)；hate，love，fear，like，want，wish，prefer，refuse，forgive(表示感情的动词)；be，exist，remain，stay，obtain(表示存在状态的动词)；have，possess，own，contain，belong，consist of，form(表示占有与从属的动词)；understand，know，believe，think，doubt，forget，remember(表示思考理解的动词)。但是如果它们词义改变，便也可用进行时态。例如：

1)Tom looks pale. What’s wrong with him?

(look在此为联系动词，意为“显得，看上去”)

2)Tom is looking for his books.

(look在此为实义动词，意为“寻找”)

2.过去进行时

过去进行时表示一个过去的动作发生时或发生后，另一个过去的动作正在进行，或表示过去反复的习惯，常与always，continually，constantly等动词连用。例如：

1)We were discussing the matter when the headmaster entered.

2)Whenever I visited him, he was always writing at the desk.

3.将来进行时

将来进行时主要表示将来某一时刻正在进行的动作，或表示要在将来某一时刻开始，并继续下去的动作。常用来表示礼貌的询问、请求等。例如：

1)This time next day they will be sitting in the cinema.

2)What will you be doing at six tomorrow evening?

4.完成进行时

(现在、过去、将来)完成进行时是(现在、过去、将来)完成时的强调形式，将放在完成时态部分讲述。

三、完成时态

完成时态通常表示已完成或从事的动作。它可分为：

1.现在完成时

(1)现在完成时用来表示对目前状况仍有影响的，刚刚完成的动作(常与yet，already，just连用)，或者过去某一时刻发生的，持续到现在的情况(常与for，since连用)。例如：

1)I have just finished my homework.

2)Mary has been ill for three days.

(2)常与现在完成时连用的时间状语有：since, for, during, over等引导出的短语；副词already, yet, just, ever, now, before, often, lately, recently等；状语词组this week (morning, month, year), so far, up to now, many times, up to the present等。例如：

1)I haven’t been there for five years.

2)So far, she hasn’t enjoyed the summer vacation.

3)There have been a lot of changes since 1978.

(3)完成时态可用在下列结构中：

This (That, It) is (was) the first (second…) time +定语从句；This (That, It) is (was) the only (last) + n +定语从句；This (That, It) is (was) +形容词最高级+ n +定语从句。如果主句的谓语动词是一般现在时，从句的谓语动词通常用现在完成时；如果主句谓语动词是一般过去时，从句谓语动词通常用过去完成时。例如：

(1)This is one of the rarest questions that have ever been raised at such a meeting.

(2)There was a knock at the door. It was the second time someone had interrupted me that evening.

2.过去完成时

(1)表示过去某时间前已经发生的动作或情况，这个过去的时间可以用by，before等介词短语或一个时间状语从句来表示；或者表示一个动作在另一个过去动作之前已经完成。例如：

1)We had just had our breakfast when Tom came in.

2)By the end of last year they had turned out 5, 000 bicycles.

(2)动词expect, hope, mean, intend, plan, suppose, wish, want, desire等用过去完成时，表示过去的希望、预期、意图或愿望等没有实现。例如：

I had meant to take a good holiday this year, but I wasn’t able to get away.

另外两种表示“过去想做而未做的事”的表达方式是：

1)was / were + to have done sth,例如：

We were to have come yesterday, but we couldn’t.

2)intended (expected, hope, meant, planned, supposed, wished, wanted, desired) + to have done sth,例如：

I meant to have told you about it, but I forgot to do so.

(3)过去完成时常用于以下固定句型：

1)hardly, scarcely, barely + 过去完成时+ when + 过去时。例如：

Hardly had I got on the bus when it started to move.

2)no sooner +过去完成时+ than +过去时。例如：

No sooner had I gone out than he came to see me.

3)by (the end of ) +过去时间，主句中谓语动词用过去完成时。例如：

The experiment had been finished by 4 o’clock yesterday afternoon.

3.将来完成时

将来完成时表示在将来某一时刻将完成或在另一个未来的动作发生之前已经完成的动作；也可以用来表示一种猜测。常与将来完成时连用的时间状语有：by (the time / the end of ) +表示将来时间的短语和句子；before (the end of ) +表示将来时间的词语或句子；when, after等加上表示将来动作的句子等。例如：

1)By this time tomorrow you will have arrived in Shanghai.

2)I shall have finished this composition before 9 o’clock.

3)When we get on the railway station, the train will probably have left.

4.完成进行时

完成进行时是完成时的强调形式，有现在完成进行时，过去完成进行时，将来完成进行时。

(1)现在完成进行时表示过去某一时刻之前开始的动作或状态一直延续到过去某一时刻。例如：

I have been looking for my lost book for three days, but I still haven’t found it.

(2)过去完成进行时表示过去某一时刻之前开始的动作或状态一直延续到过去某一时刻。例如：

It had been raining cats and dogs for over a week and the downpour had caused landslides in many places.

(3)将来完成进行时表示在将来某一时刻之前开始的一个动作或状态一直延续到将来某一时刻。例如：

By the time you arrive tonight, she will have been typing for hours.

四：时态一致

时态一致是英语四、六级考试的一个重要内容。通常应由主句谓语的时态决定从句的谓语时态。一般原则是：

1、当主句谓语使用现在时或将来时，从句的谓语根据具体情况使用任何时态

He says that he lives in Wuhan.

We hope that there will be many people at your party today.

“Did you hear that Bill finally sold the house?” “Yes, but I don’t know who bought it.”

“There’s a lot of excitement on the street.”

“There certainly is. Do you suppose the astronauts have returned?”

2、当主句谓语使用过去时的时候，从句的谓语必须使用过去范围的时态

He said he was writing a novel.

The teacher wanted to know when we would finish the experiment.

He said his father had been an engineer.

3、当从句是表示没有时间概念的真理时，从句的谓语应使用一般现在时。例如：

The teacher told them since light travels faster than sound, lightning appears to go before thunder.

注：在此种情况下，即使主句谓语用了过去式的各种时态，从句谓语也应用一般现在时。

4、从句谓语只能用虚拟语气的情况

利用时态一致原则确定从句动词时态时，还应注意，若主语动词是表示命令、请求、要求、建议、劝告等的动词，从句谓语只能用虚拟语气，不能遵循时态一致原则。例如：

We insisted that we do it ourselves.

动词的语态

语态也是动词的一种形式，英语有两种语态：主动语态和被动语态。主动语态表示主语是动作的执行者，而被动语态表示主语是动作的承受者。

1)We use electricity to run machines. (主动语态)

2)Electricity is used to run machines. (被动语态)

1.不能用于被动语态的动词和短语

(1)在英语中，不及物动词不能用于被动语态，但有些不及物动词(包括短语)容易引起误用。如：appear, belong, belong, die, escape, fall, happen, last, remain, succeed, occur, come true, take place, consist of。

(2)某些表示状态或特征的及物动词，如：become, contain, cost, fit, have, resemble, suit也没有被动语态。

2.被动语态的时态形式

常用的被动语态有表1所列的几种时态形式。

表1

时?SPAN lang=EN-US> 一般时进行时完成时

现在 am asked am being asked

is asked is being asked

are asked are being asked

过去

was be asked was being asked

were be asked were being asked

将来 shall be asked shall have been asked

will be asked will have been asked

过去 should be asked should have been asked

将来 would be asked would have been asked

3.短语动词的被动语态

短语动词转换为被动语态时，通常被看作是一个动词，后面的介词或副词不能拆开或省略。例如：

1)So far no correct conclusion has arrived at.

2)All the rubbish should be got rid of.

4.“get + -ed分词”的被动语态

“get + -ed分词”结构强调动作的结果，而非动作本身，常用来表示突发性的，出乎意料的偶然事件。例如：

The boy got hurt on his way home from work.

另外，“get + -ed分词”还可用于谈论为自己做的事，是主动的行为而不是被动的行为。例如：

get dressed(穿衣服) get divorced(离婚)

get engaged(订婚) get confused(迷惑不解)

get lost(迷路) get washed(洗脸)

get married(结婚)

5.能带两个宾语和复合宾语的动词改为被动语态

(1)能带两个宾语的动词改为被动语态时，一次只能由一个宾语作主语，另一个宾语被保留下来。例如：

1)We showed the visitors our new products.(主动语态)

2)The visitors were shown our new products.(被动语态)

3)Our new products were shown to the visitors.(被动语态)

(2)能带复合宾语的动词改为被动语态时，原来的宾语补足语变为主语补足语。例如：

1)The teacher appointed him League secretary.(主动语态)

2)He was appointed League secretary.(被动语态)

6.被动语态与系表结构的区别

(1)The novel was well written.(系表结构)

(2)The novel was written by Diskens.(被动语态)

7.少数动词的主动语态有时有被动的意思

例1：The book is selling remarkably well.

例2：The song sounds very beautiful.

能这样用的动词还有read(读起来)，clean(擦起来)，wash(洗起来)，write(写起来)。

例3：My watch needs cleaning. (= My watch needs to be cleaned).

能像need这样用的动词还有：want, require, deserve, do, owe, bind等。

例4：The meat is cooking.

例5：The book written by the professor is printing

Answer 2

1、一般现在时的用法
当主语是第三人称单数时，行为动词有以下变化：
a:一般动词在词尾加- s
b: 以字母 s, x, ch, sh, o结尾的动词加-es
c: 以辅+y 结尾的动词，去y,加-ies
变形：1.(主语为第三人称时)否定句在动词前面用助动词does + not = doesn't, 这时行为动词用原形，一般疑问句在句首加助动词does，这时后面的行为动词用原形。
e.g: She likes apples.(肯定句)
She doesn't like bananas.(否定句) Does she like oranges?(一般疑问句)
2.（主语不为第三人称时）当谓语是行为动词时，否定句，疑问句中要加助动词do。
e.g: Do you like Chinese food? 你喜欢中国食品吗？
We don't have any classes on Sundays. 我们星期天不上课。
用法：
1) 经常性或习惯性的动作，常与表示频度的时间状语连用。时间状语： every…, sometimes, at…, on Sunday。例如：
I leave home for school at 7 every morning.
2) 客观真理，客观存在，科学事实。
The geography teacher told us the earth moves around the sun.
Shanghai lies in the east of China.
3) 表示格言或警句中。如：Pride goes before a fall. 骄者必败。
注意：此用法如出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
例：Columbus proved that the earth is round..
4) 现在时刻的状态、能力、性格、个性。
I don't want so much. Ann Wang writes good English but does not speak well.
5）表示知觉、态度、感情、某种抽象的关系或概念的词常用一般现在时：see、hear、smell、taste、feel、notice、agree、believe、like、hate、want、think、belong seem等。如：
I know what you mean.
Smith owns a car and a house.
All the students here belong to No.1 Middle School.
6）在时间、条件状语从句中常用一般现在时代替将来时。但要注意由if 引导的条件状语从句中可以用shall或will表"意愿"，但不表示时态。
译：不管他同意与否，我都会待在家里。________________________________________
译：如果时间允许的话，我们明天去那里。______________________________________.
译：如果你愿意接受并参加我们的舞会，我的家人会非常高兴。
_______________________________________________________________

2.现在进行时
结构：is/are/am+V-ing
V-ing的构成：a: 在动词原形末尾加-ing.
b: 以不发音的e结尾的动词，先去e, 再加-ing.
c：以重读闭音节结尾的动词（辅+元+辅），双写，再加V-ing.
现在进行时的基本用法：
a. 表示现在( 指说话人说话时) 正在发生的事情。
We are waiting for you.
b. 习惯进行：表示长期的或重复性的动作，说话时动作未必正在进行。
Mr. Green is writing another novel.
(说话时并未在写，只处于写作的状态。)
She is learning piano under Mr. Smith.
c. 表示渐变的动词有：get, grow, become, turn, run, go, begin等。
翻译： 叶子在变红。_____________________________
翻译：天越来越热了。___________________________
d. 与always, constantly, forever 等词连用，表示反复发生的动作或持续存在的状态，往往带有说话人的主观色彩。
You are always changing your mind.

3. 过去进行时
1） 概念：表示过去某时正在进行的状态或动作。
2） 过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候，另一个短动作发生。
3) 常用的时间状语有this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while等。例如：
My brother fell while he was riding his bicycle and hurt himself.
他们离开车站时，正下着雨。__________________________
我到达山顶时，阳光灿烂。______________________________

4. 将来进行时
1) 概念：表示将来某时进行的状态或动作，或按预测将来会发生的事情。
She'll be coming soon.
I'll be meeting him sometime in the future.
注意：将来进行时不用于表示"意志"，不能说 I'll be having a talk with her.
2）常用的时间状语
tomorrow, on Sunday, by this time，tomorrow, in two days, tomorrow evening
例如：By this time tomorrow, I'll be flying across the ocean.

5、 一般过去时的用法
动词过去式的规则变化a:一般动词在词尾加- ed work-- worked ,
b: 以e结尾的动词加-d live --lived
c: 以辅+y 结尾的动词，变y为i,加-ed study -studied
d：以重读闭音节结尾的动词（辅+元+辅），双写，再加ed. Stop--stopped
e: 不规则变化： have/has -- had,eat--ate, see—saw，am/is—was, go—went,do—did,take--took,run--ran,lend--lent,sleep--slept,get—got,,meet—met,,bring—brought,,buy—bought, think—thought, say—said, give—gave, put—put
变形：否定句在动词前面用助动词did + not = didn't, 这时行为动词用原形. She didn’t like cheese.
疑问句将助动词did置于句首，这时行为动词用原形。Did she get up late?

用法：
1）在确定的过去时间里所发生的动作或存在的状态。
时间状语有：yesterday, last week, an hour ago, the other day, in 1982等。
Where did you go just now?
2）表示在过去一段时间内，经常性或习惯性的动作。
When I was a child, I often played football in the street.
3）句型：
It is time for sb. to do sth "到……时间了" "该……了"
It is time sb. did sth. "时间已迟了" "早该……了"
It is time for you to go to bed. 你该睡觉了。
It is time you went to bed. 你早该睡觉了。
would (had) rather sb. did sth. 表示'宁愿某人做某事'
I'd rather you came tomorrow.
4) wish, wonder, think, hope 等用过去时，作试探性的询问、请求、建议等。
I thought you might have some. 我以为你想要一些。
注意： 用过去时表示现在，表示委婉语气。
1）动词want, hope, wonder, think, intend 等。
Did you want anything else? I wondered if you could help me.
2）情态动词 could, would.
Could you lend me your bike?

6. 一般将来时
表示将来的动作或状态。
1) shall用于第一人称，常被will 所代替。
will 在陈述句中用于各人称，在争求意见时常用于第二人称。
译：我先读哪一段呢？______________________________________
译：今晚七点回家好吗？____________________________________
注意：
一般将来时表示一种倾向或推测：
Flowers will die without water. 没有水花会枯死的。
Water will change into ice at 0℃. 水在零摄氏度就会结冰
2) be going to +不定式，表示将来。
a. 主语的意图，即将做某事。
What are you going to do tomorrow?
b. 计划，安排要发生的事。
The play is going to be produced next month。
c. 有迹象要发生的事
Look at the dark clouds, there is going to be a storm.
3) be +不定式表将来，按计划或正式安排将发生的事。
We are to discuss the report next Saturday.
4) be about to +不定式，意为马上做某事。
He is about to leave for Beijing.
注意：be about to 不能与tomorrow, next week 等表示明确将来时的时间状语连用。
5）与表示时间或条件的状语从句连用,主句用一般将来时，从句用一般现在时表将来。
译:他一到我就通知你。____________________________________________________.
译：除非下雨，否则我们是要去的。_____________________________.
6). 用现在进行时表示将来
下列动词come, go, arrive, leave, start, begin, return等现在进行时可以表示将来。
例如：
I'm leaving tomorrow. 明天我要走了。
Are you staying here till next week? 你会在这儿呆到下周吗？

7..现在完成时
现在完成时用来表示之前已发生或完成的动作或状态，其结果的影响现在还存在；也可表示持续到现在的动作或状态。其构成：have （has） +过去分词。
结构：have/has+动词的过去分词
动词的过去分词的规则变化：a:一般动词在词尾加- ed
b: 以e结尾的动词加-d
c: 以辅+y 结尾的动词，去y,加-ied
d：以重读闭音节结尾的动词（辅+元+辅），双写，再加ed.
用法：（1）表示过去发生或已经完成的动作对现在造成的影响或结果。 标志词：already, just (一般用在肯定句中)，yet, ever, never(一般用在否定句或疑问句中)
e.g: Have you finished your work yet?
(2)表示过去已经开始，持续到现在的动作或状态，可以和表示从过去某一时刻延续到现在（包括“现在”在内）的一段时间状语连用，如：these day, all this year, recently, so far, up to now, for+一段时间，since+过去某一时间点，since+从句（从句必须用一般过去时）。
e.g：I've studied English for two years. I've studied English since I was ten.
★在含有一段时间的肯定句中和how long 开头的句子中不能用短暂性动词。
常见的短暂性动词及相对应的延续性动词：
come—be here come to –-be in/at go out ---be out move/leave---be away, be out of begin/start---be on buy---have borrow---keep join---be/become a member of, be in die---be dead catch a cold---have a cold get to know---know become---be fall asleep---be asleep go to sleep--sleep open--be open end/finish--be over get up---be up
e.g: The film has begun for half an hour.(×) The film has been on for half an hour.(√)
(3)have been to 去过…… have gone to 已经去了……
1.My father____ home for nearly three weeks.
A.has gone away from B.has left C.has been away from D.went away
2.Mr. and Mrs. Green have_____in China for a week.
A.been B.got C.arrived D.reached
3.--Where's Mary?
--Oh,she _____the library.
A. has gone to B. went to C. has been to D. had gone to
4.I'm not feeling well. I've caught a cold for three days.(改错)
现在完成时考点分析：
①现在完成时除可以和for、since引导的状语连用外，还可以和下面的介词短语连用：during / in /over the last(past)few years (months, weeks)、in recent years等。
②用于现在完成时的句型
It is (has been) + 一段时间 + since从句
This(That / It)is the first(second...)time that + 完成时
It is the first time that I have visited the city. 这是我第一次访问这城市。
This is the first time （that） I've heard him sing. 这是我第一次听他唱歌。
This is +形容词最高级+that…结构，that 从句要用现在完成时。例如：
This is the best film that I’ve (ever) seen. 这是我看过的最好的电影
注意：It was the third time that the boy had been late.
③在时间或条件状语从句中，现在完成时可以代替一般将来时。如：
I shall post the letter as soon as I have written it.
If you have done the experiment, you will realize the theory better.
Don't get off the bus until it has stopped.
注意： 比较一般过去时与现在完成时
1）一般过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。
2）一般过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。
一般过去时的时间状语：yesterday, last week，…ago, in1980, in October, just now等，皆为具体的时间状语。
现在完成时的时间状语：for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always等，皆不确定的时间状语。
共同的时间状语：this morning, tonight, this April, now, already, recently, lately 等。
3）现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如live, teach, learn, work, study, know.。
一般过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。如：
I saw this film yesterday. （强调看的动作发生过了）
I have seen this film. （强调对现在的影响，电影的内容已经知道了）
Why did you get up so early? （强调起床的动作已发生过了）
Who hasn't handed in his paper? （强调有卷子未交）
He has been in the League for three years. （在团内的状态可延续）
He has been a League member for three years. （是团员的状态可持续）
句子中如有过去时的时间副词（如yesterday, last, week, in 1960）时，不能使用现在完成时，要用过去时。
（错）Tom has written a letter to his parents last night.
（对）Tom wrote a letter to his parents last night.

8.过去完成时
1） 概念：表示过去某一段时刻或某一动作之前完成的动作或存在的状态。
其构成是had +过去分词构成。
2） 概念：表示过去的过去
----|----------|--------|----> 其构成是had +过去分词构成。
那时以前 那时 现在
3） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句。
She said (that) she had never been to Paris.
b. 状语从句
在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。
When the police arrived, the thieves had run away.
c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本…，未能…"
We had hoped that you would come, but you didn't.
3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。
句型：hardly had sb done sth when sb did sth
no sooner had sb done sth than sb did sth

9.将来完成时
1) 构成will / be going to do sth. 2) 概念
（1） 状态完成：表示某事继续到将来某一时为止一直有的状态。例如：
译：到那时他们结婚将有二十年了。____________________________
（2）动作完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或获得的经验。
译：明天此时，你已经到达上海了 ________________________________
注意容易混淆的时态：
①.将来完成时
1） 状态完成：表示某事继续到将来某一时为止一直有的状态。例如：
They will have been married for 20 years by then. 到那时他们结婚将有二十年了。
2）动作完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或获得的经验。
You will have reached Shanghai by this time tomorrow. 明天此时，你已经到达上海了
② 将来进行时 表示将来某时进行的状态或动作，或按预测将来会发生的事情。例如：
By this time tomorrow, I'll be lying on the beach. 明天此时，我正躺在海滩上呢。
（这是初中和高中比较常用的时态，希望对你有所帮助）