03_be 动词,一般动词的过去式

be动词的过去式→was/were

am/is→was、are→were过去式be动词表示“过去时间中发生的状态”例:

  • (现在式)He is busy now.(他现在很忙。)
  • (过去式)He was busy then.(他那时很忙。)
  • (现在式)My parents are at home now.(我父亲现在在家。)
  • (过去式)My parents were at home yesterday.(我父母昨天在家。)

时间副词改变,动词也必须改变。

be动词(过去式)的否定句

含有be动词(was、were)的肯定句变为否定句时,在be动词知乎加not即可。例:

  • Mr.Brown was a vet.(Brown先生是一个兽医。)
  • (否定句)Mr.Brown was not a vet.
  • Joe and Brian were in the living room at that time.(那时Joe和Brain在客厅。)
  • Joe and Brian weren't in the living room at that time.

be动词(过去式)的疑问句

含有be动词(was、were)的肯定句变为疑问句时,将be动词到主语前,句尾加问号即可。

  • 肯定句:主语 +was(were)
  • 疑问句:Was(Were)+主语?

例:

  • Wendy was in the seventh grade last year.(Wendy去年读七年级吗?)
  • (疑问句)Was Wendy in the seventh grade last year?

be动词开头的疑问句,可用yes或no回答。而答句中的主,需用代名词。
答句:

  • Yes,主语 + was/were
  • No,主语 + wasn't/weren't

一般动词的过去式

一般动词的过去式。分为规则变化和不规则变化。

规则变化:

  • 原形动词+ed
  • 原形动词字尾有e+d
  • 原形动词为子音+短母音+子音→重复词尾+ed
  • 原形动词词尾为子音+y→去y+ied

不规则变化:

  • eat→ate
  • read→read
  • ride→rode(骑)
  • come→came(来)
  • go→went
  • have→had(有,吃)
  • see→saw
  • each→taught
  • give→gave
  • take→took(拿)

例:

  • I walk to school every day.(我每天走路上学。)
  • (过去式)I walked to school yesterday.(我昨天走路上学。)
  • Mother goes to a supermarket every morning.(妈妈每天去超市。)
  • (过去式)Mother went to a supermarket yesterday.

主语为第三人称单数时,过去式动词不加s。一般动词(过去式)的否定句→需用助动词did。

  • 肯定句:主语+一般动词(过去式)
  • 否定句:主语+did not+原形动词

例:

  • He called you last night.(他昨晚打电话给你。)
  • (否定句)He did not call you last night。 = He didn't call you last night.
  • (否定句)My sister and I did not watch TV all day yesterday. = My sister and I didn't watch TV all day yesterday.

比较:否定句(过去式)be动词:

  • She was at home.
  • She wasn't at home.

一般动词:

  • She studied English.
  • She didn't student English.

一般动词(过去式)的疑问句

  • 肯定句:主语 + 一般动词(过去式)
  • 疑问句:Did + 主语 + 原形动词?

例:

  • His friend went to that movie last week.(他的朋友上个星期去看了那部电影。)
  • (疑问句)Did his friend go to that movie last week?
  • (答句)Yesy,they did. / No,they didn't.
  • Grace wrote a letter to David.
  • (疑问句)Did Grace write a letter to Davie?
  • (答句)Yes,she did. / No,she didn't.

比较:疑问句(过去式)be动词:

  • He was sick.
  • Was he sick?

一般动词:

  • He did his homework.

  • Did he do his homework?

  • do/does(现)→一般动词-做

  • did(过)→助动词(+原形动词)

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