zh-CNiwms.net pic/logo.gif http://www.enun.cn Sat, 10 Jun 2006 00:09:18 GMT 　　Mother used not to be so forgetful.　　
　　Scarf used to take a walk.　 (过去常常散步)
be used to + doing： 对……已感到习惯，或"习惯于"，to是介词，后需加名词或动名词。
　　He is used to a vegetarian diet.　　
　　Scarf is used to taking a walk.(现在习惯于散步)
典型例题　　　
---- Your phone number again? I ___ quite catch it....]]> Sat, 10 Jun 2006 00:09:18 GMT 　 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.
　 Whenever the Browns went during their visit, they were given a warm welcome.　　　　　
3）句型：
　 It is time for sb. to...]]> Sat, 10 Jun 2006 00:09:14 GMT 　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。
　　 The leaves are turning red.
　　 It's getting warmer and war...]]> Sat, 10 Jun 2006 00:09:13 GMT 　2) 概念　
　　a. 状态完成：表示某事继续到将来某一时为止一直有的状态。
　　b. 动作完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或一获得的经验。
　　　They will have been married for 20 years by then.
　　　You will have reached Shanghai by this time tomorrow.
...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　 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.
3)　叙述历史事实，可不用过去完成时，而只用一般过去时。
　　 Our teacher told us that Columbus discovered America in 1492.
...]]> Sat, 10 Jun 2006 00:09:13 GMT ----|-------|-----|---->其构成是had +过去分词构成。
那时以前　 那时　现在　　　　　　
2） 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, expe...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　延续动词表示经验、经历； 瞬间动词表示行为的结 果，不能与表示段的时间状语连用。
　　 He has completed the work.　　他已完成了那项工作。 (表结果)
　　 I've known him since then.　　 我从那时起就认识他了。(表经历)
2)　用于till / until从句的差异
　　 延续动词用于肯定句，表示"做……直到……" 瞬间动词用于否定句，表示"到……，才……"
　　 He didn't come back until ten o'clock.
　　　　他到10 点才回来。
　　 He slept until ten o'clock....]]> Sat, 10 Jun 2006 00:09:13 GMT 　 I have been here since 1989.
2) since +一段时间+ ago
　 I have been here since five months ago.
3) since +从句　
　 Great changes have taken place since you left.
　 Considerable time has elapsed since we have been here.
4) It is +一段时间+ sinc...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　I have lived here for more than twenty years.
　　I have lived here since I was born..
　　My aunt has worked in a clinic since 1949.　
　　Some new oilfields have been opened up since 1976.
　　I have known Xiao Li since she was a little girl.　
　　My brother has been in the Youth League for two years....]]> Sat, 10 Jun 2006 00:09:13 GMT 　 It is the first time that I have visited the city.
　 It was the third time that the boy had been late.
2）This is the… that…结构...]]> Sat, 10 Jun 2006 00:09:13 GMT 2）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, 具体的时间状语
共同的时间状语:　
this morning, tonight,this April, now, once，before, already, recently，lately　
现在完成时的时间状语
for, since, so far, ev...]]> Sat, 10 Jun 2006 00:09:13 GMT ...]]> Sat, 10 Jun 2006 00:09:13 GMT 　 I'm leaving tomorrow.
　 Are you staying here till next week?
...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　　The train leaves at six tomorrow morning.
　　　When does the bus star? It stars in ten minutes.
2）倒装句，表示动作正在进行，如：
　　　 Here comes the bus. = The bus is coming.
　　　 There goes the bell. = The bell is ringing.
3）在时间或条件句中。
　　　 When Bill co...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　 be going to 表示主观的打算或计划。
　I am to play football tomorrow afternoon.　　 (客观安排)
　I'm going to play football tomorrow afternoon. (主观安排)
...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　　　　　　 will　表意愿
　　If you are going to make a journey, you'd better get ready for it as soon as possible.
　　Now if you will take off your clothes, we will fit the new clothes on you in front of the mirror.
...]]> Sat, 10 Jun 2006 00:09:13 GMT 　　will 在陈述句中用于各人称，在争求意见时常用于第二人称。
　　Which paragraph shall I read first.
　　Will you be at home at seven this evening?
2)　be going to +不定式，表示将来。
　 a. 主语的...]]> Sat, 10 Jun 2006 00:09:09 GMT 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...]]> Sat, 10 Jun 2006 00:09:09 GMT 　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.
...]]> Sat, 10 Jun 2006 00:09:09 GMT 　　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.
...]]>