第三人称单数的构成见下表：

考点名称：一般过去时，动词过去式

• 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。
  be动词在第一人称是单数和第三人称是单数是用was，其余用were。
  a. 表示在过去时间里所发生的动作或存在的状态，常与表示过去的时间状语。
  yesterday（昨天）、last week   （上星期）、an hour ago（一小时前）等连用。 
    例：I went to the zoo with my father last Sunday. 上周日我和我爸爸去动物园了。
       They weren't able to come because they were so busy.他太忙了，所以去不了。
  b. 表示在过去一段时间里，经常性或习惯性的动作或状态。 
    例：My brother watched the World Cup every day last month.上个月哥哥每天都看世界杯比赛。

• 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?

  
  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

• 一般过去时用法口诀：
  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！

•  过去式和过去分词的构成表：
  

  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

  不规则变化的动词过去式：
  have---had are---were get---got say---said feel---felt do/does---did is---was go---went   drink--drank eat--ate bring----brought think----thought
  buy----bought catch---- caught teach ---- taught sit----sat wear----wore cut----cut sweep----swept sleep——slept become----became

考点名称：动名词

• 动名词：
  如果一个动词加上了-ing变成了名词，那么这个词称动名词。 动名词是一种兼有动词和名词特征
  的非限定动词。它可以支配宾语，也能被副词修饰。动名词有时态和语态的变化。
  例：Reading is an art. 读书是一种艺术。 
  Swimming is a good sport in summer. 游泳是夏天一项好的运动。 
  There is no saying when he'll come. 很难说他何时回来。 
  No smoking. (=No smoking is allowed here) . 禁止吸烟！ 
  No parking. 禁止停车！ 
  Let’s go shopping. 让我们去购物。

•  

• 动名词常见题型:
  1）动名词做主语时，谓语动词为单数
  2）在动名词和不定式中，作为介词的宾语是动名词
  3）动名词的否定直接在其前加否定词，通过代词的宾格或所有格形式给出逻辑主语
  例：
  I would appreciate_______ back this afternoon.
  A．you to call
  B．you call
  C．you calling
  D．you’re calling
  （Key：C；换成your calling也对）
  4）有些词后只能接动名词
  acknowledge;admit; advise;advocate;allow;appreciate; avoid; celebrate; consider; contemplate; defer; delay; deny; detest; discontinue; dislike; dispute; enjoy; it entails; escape; excuse; explain; fancy; feel like; finish; forgive; can’t help; hinder; imagine; it involves; keep; it means; mention; mind; miss; it necessitates; pardon; postpone; practice; prevent; recall; report; resent; resist; risk; suggest; understand...
  5）另外还有一些接-ing形式的常用说法
  it’s no good; it’s no/little/hardly any/ use; it’s not/hardly/scarcely use; it’s worthwhile; spend money/time; there’s no; there’s no point in; there’s nothing worse than; what’s the use/point...
  6）有些词后面加不定式和动名词均可
  remember,forget,try,stop,go on,continue,stop,regret,cease,mean后面均可用不定式和-ing形式，但意义截然不容。
  例：
  remember to do/doing：
  ①I remembered to post the letters.（指未来/过去未来将要做的动作）