那时以前 那时 现在
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.
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。
He said that he had learned some English before.
By the time he was twelve, Edison had began to make a living by himself.
Tom was disappointed that most of the guests had left when he arrived at the party.
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B，were writing, has left C. had written, had left D. were writing, had left
注意： had no … when 还没等…… 就……
had no sooner… than 刚…… 就……
He had no sooner bought the car than he sold it.
1) 两个动作如按顺序发生，又不强调先后，或用then，and，but 等连词时，多用一般过去时。
When she saw the mouse，she screamed.
My aunt gave me a hat and I lost it.
2 ) 两个动作相继发生，可用一般过去时;如第一个动作需要若干时间完成，用过去完成时。
When I heard the news, I was very excited.
Our teacher told us that Columbus discovered America in 1492.
1) 构成will / be going to do sth.
They will have been married for 20 years by then.
You will have reached Shanghai by this time tomorrow.
a. 表示现在( 指说话人说话时) 正在发生的事情。
We are waiting for you.
Mr. Green is writing another novel.
She is learning piano under Mr. Smith.
c. 表示渐变的动词有：get, grow, become, turn, run, go, begin等。
The leaves are turning red.
It’s getting warmer and warmer.
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.
My dictionary ___, I have looked for it everywhere but still___ it.
A. has lost, don’t find B. is missing, don’t find C. has lost, haven’t found D. is missing, haven’t found.
have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue
I have two brothers.
This house belongs to my sister.
Know, realize, think see, believe, suppose, imagine, agree, recognize, remember, want, need, forget, prefer, mean, understand, love, hate
I need your help.
He loves her very much.
3 ) 瞬间动词
accept, receive, complete, finish, give, allow, decide, refuse.
I accept your advice.
seem, remain, lie, see, hear, smell, feel, taste, get, become, turn
You seem a little tired.
this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while
My brother fell while he was riding his bicycle and hurt himself.
It was raining when they left the station.
When I got to the top of the mountain, the sun was shining.
1) Mary ___ a dress when she cut her finger.
A. made B. is making C. was making D. makes
答案C. 割伤手指是已发生的事情，应用过去时。同 时，when表时间的同时性，"玛丽在做衣服时"提供事情发生的背景，因此用过去进行时。
2) As she ___ the newspaper, Granny ___ asleep.
read; was falling B. was reading; fell C. was reading; was falling D. read;fell
答案B.句中的as = when, while，意为"当……之时"。描述一件事发生的背景时，用过去进行;一个长动作发生的时候，另一个短动作发生。句意为 "在她看报纸时，奶奶睡着了。"句中的 fell (fall的过去时)，是系动词，后跟形容词，如：fall sick。
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.
Soon, tomorrow, this evening，on Sunday, by this time，tomorrow, in two days, tomorrow evening
By this time tomorrow, I’ll be lying on the beach.
When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the year, immediately
He is going to visit her aunt the day he arrives in Beijing. 他一到北京，就去看他姨妈。
(1)He said he________me a present unless I_______ in doing the experiment.
A. had not given; had not succeeded B. would not give; succeed
C. will not give; succeed D. would not give; will succeed.
答案B. 在时间，条件或让步主语从句中一般不用将来时。本题有He said，故为过去式。主句用将来时，故选B. 此处用一般过去式代替了过去将来时。
The museum opens at ten tomorrow. 博物馆明天10点开门。(实际上每天如此。)
The newspaper says that it’s going to be cold tomorrow.
Napoleon’s army now advances and the great battle begins.
hear, tell, learn, write , understand, forget, know, find , say, remember.
I hear (= have heard) he will go to London.
I forget (=have forgotten) how old he is.
2) 句型 " It is … since…"代替"It has been … since …"
3) It is (= has been) five years since we last met.
1) 句型：Here comes… ; There goes…
Look, here comes Mr. Li.
Are you staying with us this weekend? 这周和我们一起度周末吗?
We are leaving soon. 我们马上就走。
2) 渐变动词，如：get, run, grow, become, begin及die。
He is dying.
At that time, people did not know that the earth moves.
He told me last week that he is eighteen.
2) 宾语从句中的助动词ought, need, must, dare 时态是不变的。
He thought that I need not tell you the truth.
一般现在时 every …, sometimes, at …, on Sunday,
一般过去时 yesterday, last week, an hour ago, the other day, in 1982, just now
一般将来时 next…, tomorrow, in+时间,
现在完成时 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently
过去完成时 before, by, until, when, after, once, as soon as
过去进行时 this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while
将来进行时 soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening