英語時(shí)態(tài)的用法：一般現(xiàn)在時(shí)

　　1) 經(jīng)常性或習(xí)慣性的動(dòng)作，常與表示頻腮度的時(shí)間狀語連用。

　　時(shí)間狀語： every…, sometimes,　at…, on Sunday

　　I leave home for school at 7 every morning.

　　2) 客觀真理，客觀存在，科學(xué)事實(shí)。

　　The earth moves around the sun.

　　Shanghai lies in the east of China.

　　3) 表示格言或警句中。

　　Pride goes before a fall.　驕者必?cái)　?/p>

　　注意：此用法如果出現(xiàn)在賓語從句中，即使主句是過去時(shí)，從句謂語也要用一般現(xiàn)在時(shí)。

　　例：Columbus proved that the earth is round..

　　4) 現(xiàn)在時(shí)刻的狀態(tài)、能力、性格、個(gè)性。

　　I don't want so much.

　　Ann Wang writes good English but does not speak well.

　　比較：Now I put the sugar in the cup.

　　I am doing my homework now.

　　第一句用一般現(xiàn)在時(shí)，用于操作演示或指導(dǎo)說明的示范性動(dòng)作，表示言行的瞬間動(dòng)作。再如：Now watch me, I switch on the current and stand back. 第二句中的now是進(jìn)行時(shí)的標(biāo)志，表示正在進(jìn)行的動(dòng)作的客觀狀況，所以后句用一般現(xiàn)在時(shí)。

　　英語時(shí)態(tài)的用法：一般過去時(shí)

　　1)在確定的過去時(shí)間里所發(fā)生的動(dòng)作或存在的狀態(tài)。

　　時(shí)間狀語有：yesterday, last week, an hour ago, the other day, in 1982等。

　　Where did you go just now?

　　2)表示在過去一段時(shí)間內(nèi)，經(jīng)常性或習(xí)慣性的動(dòng)作。

　　When I was a child, I often played football in the street.

　　Whenever the Browns went during their visit, they were given a warm welcome.

　　3)句型：

　　It is time for sb. to do sth　 "到……時(shí)間了"　 "該……了"

　　It is time sb. did sth. "時(shí)間已遲了"　 "早該……了"

　　It is time for you to go to bed.　 你該睡覺了。

　　It is time you went to bed.　　　你早該睡覺了。

　　would (had) rather sb. did sth.　表示'寧愿某人做某事'

　　I'd rather you came tomorrow.

　　4) wish, wonder, think, hope 等用過去時(shí)，作試探性的詢問、請求、建議等。

　　I thought you might have some. 我以為你想要一些。

　　比較：

　　一般過去時(shí)表示的動(dòng)作或狀態(tài)都已成為過去，現(xiàn)已不復(fù)存在。

　　Christine was an invalid all her life.

　　(含義：她已不在人間。)

　　Christine has been an invalid all her life.

　　(含義：她現(xiàn)在還活著)

　　Mrs. Darby lived in Kentucky for seven years.

　　(含義：達(dá)比太太已不再住在肯塔基州。)

　　Mrs. Darby has lived in Kentucky for seven years.

　　( 含義：現(xiàn)在還住在肯塔基州，有可能指剛離去)

　　注意： 用過去時(shí)表示現(xiàn)在，表示委婉語氣。

　　1)動(dòng)詞want, hope, wonder, think, intend 等。

　　Did you want anything else?

　　I wondered if you could help me.

　　2)情態(tài)動(dòng)詞 could, would.

　　Could you lend me your bike?　　<<<返回目錄

　　英語時(shí)態(tài)的用法：現(xiàn)在進(jìn)行時(shí)

　　1.概念：表示現(xiàn)階段或說話時(shí)正在進(jìn)行的動(dòng)作及行為.

　　2.時(shí)間狀語：now, at this time, these days, etc.

　　3.基本結(jié)構(gòu)：am/is/are+doing

　　4.否定形式：am/is/are+not+doing.

　　5.一般疑問句：把be動(dòng)詞放于句首.

　　6.例句： How are you feeling today?

　　He is doing well in his lessons.

　　英語時(shí)態(tài)的用法：過去進(jìn)行時(shí)

　　現(xiàn)在進(jìn)行時(shí)的基本用法：

　　a. 表示現(xiàn)在( 指說話人說話時(shí)) 正在發(fā)生的事情。

　　We are waiting for you.

　　b. 習(xí)慣進(jìn)行：表示長期的或重復(fù)性的動(dòng)作，說話時(shí)動(dòng)作未必正在進(jìn)行。

　　Mr. Green is writing another novel.

　　(說話時(shí)并未在寫，只處于寫作的狀態(tài)。)

　　She is learning piano under Mr. Smith.

　　c. 表示漸變的動(dòng)詞有：get, grow, become, turn, run, go, begin等。

　　The leaves are turning red.

　　It's getting warmer and warmer.

　　d. 與always, constantly, forever 等詞連用，表示反復(fù)發(fā)生的動(dòng)作或持續(xù)存在的狀態(tài)，往往帶有說話人的主觀色彩。

　　You are always changing your mind.

　　典型例題

　　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.

　　答案D. 前句是一個(gè)仍在持續(xù)的狀態(tài)，應(yīng)用進(jìn)行時(shí)，由于沒有找到，其影響仍然存在，應(yīng)用完成時(shí)，瞬間動(dòng)詞用于否定式時(shí)可用于完成時(shí)。　　<<<返回目錄

　　英語時(shí)態(tài)的用法： 現(xiàn)在完成時(shí)

　　1.概念：過去發(fā)生或已經(jīng)完成的動(dòng)作對現(xiàn)在造成的影響或結(jié)果,或從過去已經(jīng)開始,持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài).

　　2.時(shí)間狀語：recently, lately, since…for…,in the past few years, etc.

　　3.基本結(jié)構(gòu)：have/has + done

　　4.否定形式：have/has + not +done.

　　5.一般疑問句：have或has.

　　6.例句：I've written an article.

　　The countryside has changed a lot in the past few years.

　　英語時(shí)態(tài)的用法：過去完成時(shí)

　　1) 概念：表示過去的過去

　　----|-------|-----|---->其構(gòu)成是had +過去分詞構(gòu)成。

　　那時(shí)以前　 那時(shí)　現(xiàn)在

　　2) 用法

　　a.　在told, said, knew, heard, thought等動(dòng)詞后的賓語從句。

　　She said (that) she had never been to Paris.

　　b. 狀語從句

　　在過去不同時(shí)間發(fā)生的兩個(gè)動(dòng)作中，發(fā)生在先，用過去完成時(shí);發(fā)生在后，用一般過去時(shí)。

　　When the police arrived, the thieves had run away.

　　c. 表示意向的動(dòng)詞，如hope, wish, expect, think, intend, mean, suppose等，用過去完成時(shí)表示"原本…，未能…"

　　We had hoped that you would come, but you didn't.

　　3)　過去完成時(shí)的時(shí)間狀語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.

　　典型例題

　　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

　　答案D. "把書忘在辦公室"發(fā)生在"去取書"這一過去的動(dòng)作之前，因此"忘了書"這一動(dòng)作發(fā)生在過去的過去，用過去完成時(shí)。句中when表示的是時(shí)間的一點(diǎn)，表示在"同學(xué)們正忙于……"這一背景下，when所引導(dǎo)的動(dòng)作發(fā)生。因此

　　前一句應(yīng)用過去進(jìn)行時(shí)。

　　注意：　had no … when　　　　　還沒等…… 就……

　　had no sooner… than　　剛…… 就……

　　He had no sooner bought the car than he sold it.　　<<<返回目錄

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