一般过去时否定句的句型结构主要有两种形式,需根据主语的人称和数进行选择:
一、实义动词的否定句
结构: 主语 + did not / didn't + 动词原形 + 其他
例如:
I did not (didn't) finish my homework yesterday.
He didn't call you last night.
注意事项
1. 动词需使用原形,无需加 -ed(如played→play);
2. 若主语为第一人称、第二人称或复数,均使用 did not,第三人称单数使用 didn't。
二、系动词(be动词)的否定句
结构: 主语 + was/were + not + 表语
例如:
She was not (didn't) at home last weekend.
They were not (didn't) ready on time.
注意事项
需根据主语选择be动词的过去式:
I/you/they → was/were
he/she/it → was
we/they → were 。
三、综合示例
实义动词:Tom didn't eat breakfast this morning.
系动词:The meeting was not (didn't) scheduled for today.
四、易混淆点
动词原形后无需加 -s或 -es,例如 didn't run而非 didn't runs;
若主语为第三人称单数(如he/she/it),be动词用 was,实义动词仍用原形(如 didn't eat)。
通过以上结构,可灵活构建一般过去时的否定句,需根据语境选择合适类型。