概念：一般过去时表示过去某个时间发生的动作或状态，常和表示过去的时间连用，yesterday，last night， in 1990，two days ago等。也表示过去经常或反复发生的动作，常和often，always 等，表示频度的时间状语连用。
例句：I got up at 6:30 yesterday. 我昨天6:30起床。
He always went to work by bus last year. 去年他总是坐公交车上班。

一般过去时的构成
一般过去时由规则动词(-ed/-d)或不规则动词的过去时表示，除be动词外，其余动词没有人称和数的变化。各种动词的否定结构和一般疑问结构，与一般现在时的否定结构和疑问结构相同。
be动词在一般过去时中的变化：
（1）am 和is 在一般过去时中变为was。 (was not=wasn't)
（2）are在一般过去时中变为were。(were not =weren't)

句中没有be动词的一般过去时的句子
●否定句：didn't +动词原形，如：Jim didn't go home yesterday.
●一般疑问句：在句首加did,句子中的动词过去式变回原形。
如：Did Jim go home yesterday.
●特殊疑问句：
（1）疑问词+did+主语+动词原形
如：What did Jim do yesterday.
（2）疑问词当主语时：疑问词+动词过去式
如: Who went to home yesterday.

规则动词过去式变化规则

情况	方法	示例
一般情况	+ed	work— worked
		look—looked
以不发音的e(哑e)结尾	+d	live —lived
		hope—hoped
		like—liked
以辅音字母+y结尾	把y变i+ed	study— studied
		carry—carried
以重读闭音节结尾且末尾只有一个辅音字母(重读辅元辅)	双写尾字母+ed	stop— stopped
		plan—planned
以ic结尾	+ked	picnic—picnicked
		traffic—trafficked
特殊情况	不规则变化	are—were
		is/am—was
		do—did
		eat—ate
		go—went
		等等

1. My mother bought two kilos of eggs in the market this morning. your mother buy in the market this morning?

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1. My mother bought two kilos of eggs in the market this morning.
your mother buy in the market this morning?