当现在分词表示的动作发 生在谓语动词之前时, 则用现在分词的完成式,且所表示动作与谓语动作同时发生, 则用现在分词的一般式。
完成或被动关系用过去分词。 　　
①现在分词：
The students went out of the classroom, laughing and talking. 　　
②过去分词：
Accompanied by his friend, he went to the railway station. 
Given   better attention, the plants could grow better. 　　

2、“while ( when, once, until, if , though等连词)＋分词”结构 　　
现在分词或过去分词作状语时，有时可以在分词前加while，when, once, although, until, if等连词。 　　
①现在分词：
When leaving the airport, she waved again and again to us.
While waiting for  the train, I had a long talk with my sister about her work…… 　　
②过去分词：
Once recovered, he threw himself into his work and made every effort to do it  well. 　　
Although working very hard, he failed to pass the final exam. If translated word by word, the passage will be difficult to understand. 　　

3、分词作定语 　　
分词作定语时，单个的分词通常放在被修饰的名词之前，分词短语一般置于所修饰的中心词后面。
现在分词修饰的是发出该动作的名词(即与名词有主谓关系)，过去分词修饰承受该动作的名词(即与名词是动宾关系)。 　　 
We will go on with our experiment as soon as we get the added fund. 　　 
This is really an exhausting day to all of us! 　　
We can see the part of the moon lighted by sunlight. 　　
After a night spent in excitement and sleeplessness, I forced myself to take a long walk along the beach the next day. 　　
More and more developing countries established strategic partnership with  developed countries 　　

4、分词作宾语补足语 　　
现在分词在see, watch, hear, observe, notice, feel, find, glimpse, glance等感官动词和look at, listen to等短语动词以及
have, keep, get, catch, leave, set, start, send等使役动词后面与名词或代词构成复合宾语，作宾语补语的成分。
例：I see him passing my house every day.
I caught him stealing things in that shop.
I smelt something burning.

5、分词作表语
分词作表语通常看作形容词来用。
过去分词表示主语的感受或状态，主语多为人。现在分词表示主语的性质，而且主语多为物；
①过去分词：
We were so bored that we couldn’t help yawning.
She felt confused, and even frightened.
②现在分词：
He was very amusing.
That book was rather boring.
很多动词的现在分词都可以作表语：
exciting, interesting, encouraging, disappointing, confusing, touching, puzzling.

考点名称：一般过去时

• 一般过去时:
  表示过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为；过去主语所具备的能力和性格。
  基本结构：
  主语+动词过去式+其他；
  否定形式①was/were+not;②在行为动词前加didn't，同时还原行为动词；
  一般疑问句Did+主语+do+其他。

• 一般过去时句法结构：
  肯定形式
  主语+动词过去式+其他
  例句：She often came to help us in those days.
  否定形式
  ①was/were+not；②在行为动词前加didn't，同时还原行为动词
  例句：I didn't know you like coffee
  一般疑问句
  ①Did+主语+do+其他？ ②Was\Were+主语+表语?
  例句：Did I do that?
  用表格整理如下：

  肯定式	疑问式	否定式	疑问否定式
  Iworked	Did I work?	I did not work	Did I not work?
  He(She,It) worked	Did he(she,it) work?	He(she,it) did not work	Did he(she,it) notwork?
  We worked	Did we work?	We did not work	Did we not work?
  You worked	Did you work?	You did not work	Did you not work?
  They worked	Did they work?	They did not work	Did they not work?

  记忆口诀：
  一般过去时并不难，过去动作、状态记心间。
  动词要用过去式，时间状语句末站。
  否定句很简单，didn't 站在动原前，其它部分不要变。
  一般疑问句也好变，did放在句子前，主语、动原、其它部分依次站。
  特殊疑问句也简单，疑问词加一般疑问句记心间。
  最后一条请注意，动词过去式要牢记！
  
  一般过去时中动词过去式变化规则：
  

  词	构成	举例
  一般情况	词尾+ed	动词原形	过去式和过去分词
  		look talk	looked talked
  以不发音字母e结尾	词尾+d	like arrive	liked arrived
  以“辅以字母+y”结尾	变y为i，再加ed	fly study	flied studied
  以重读闭音节结尾，且末尾只有一个辅音字母	双写词尾+ed	stop plan	stopped planned

  
  结构句型:
  1．一般句子
  I watched TV last night.
  2．一般疑问句
  Did you watch TV last night？
  3．there be 句型
  There was an apple on the table last night.
  Was there an apple on the table last night

• 一般过去时注意事项：
  1.注意主句与从句中时态的一致性
  如果主句用了过去时，从句中一般也要用过去式，或者过去进行时、过去完成时等。例如：
  He believed that he was right. 他相信自己是对的。
  I didn’t know you were here. 我不知道你在这儿。
  I thought they were with you. 我以为他们和你在一起。
  
  2.在口语中， 一般过去时并不一定指真正的过去，而只是表示一种礼貌性语气。例如：
  I wondered (wonder) if you could do me a favor. 不知你可否帮我一个忙。
  I wanted (want) to ask if I could borrow your car. 我想问问可否借用你的车。
  I hoped (hope) you could (can) give me some advice. 我希望你能帮我出点主意。
  Did (Do) you want to see me? 你想见我吗？
  
  3.used to
  used to 是一个词组，表示“过去曾经是……而现在已经停止了”的动作。例如：
  I used to work fourteen hours a day. 我过去常常一天干十四个小时。(而现在不这样了)
  I used to take a walk in the morning.我过去是在早晨散步。(而现在不在早晨散步了)

• 一般过去式用法：
  （1）一般过去时表示在过去某个特定时间发生，也可以表示过去习惯性、经常性的动作。
  一般过去时不强调动作对现在的影响，只说明过去的事情。
  句式：主语+动词过去式+宾语+其它
  I had a word with Julia this morning.今天早晨，我跟茱莉雅说了几句话。
  He smoked many cigarettes a day until he gave up. 他没有戒烟的那阵子，抽烟抽得可凶了。
  
  （2） 一般过去时常与表示过去的时间状语或从句连用，如：
  yesterday,last week ,in  the  past ,in 1993,at that time,once,during the war,before,a few days ago,when 等等.
  （句子中谓语动词是用一般过去时还是用现在完成时，取决于动作是否对现在有影响）。
  Have you had your lunch? 你吃过午饭了吗？（你现在不饿吗？）
  Yes,I have. 是的，我已经吃过了。（已经吃饱了，不想再吃了。）
  When did you have it? 你是什么时候吃的？（关心的是吃的动作发生在何时。）
  I had it about ten minutes ago. 我大约是十分钟以前吃的。）
  Used to do something 表示过去常做而现在已经停止了的习惯动作。