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)