作业帮一般过去式的构成与用法
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一般过去式的构成与用法
（一）、概念：一般过去时(simple past tense)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. 时间状语：1.yesterday, the day before yesterday, 2.last week,last(year, night, month…),3.ago（two hours ago）4.具体时间(in 1995, just now, at the age of , one day, long ago, once upon a time等
（二）、 构成
1．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 ) eg. I was late yesterday.
( 2) are 在一般过去时中变为were ( were not = weren’t ) eg. We were at home last Sunday.
( 3) 带有was或were 的句子,其否定、疑问的变化和is, am, are一样,即否定句在was
或were后加not, 一般疑问句把was 或were 调到句首.
2．实义动词的一般过去时: 肯定句要使用动词的过去式,否定句和疑问句要使用助动词do和 does 的过去式 did.
(1). 肯定句为：主语+动词过去式+其他
如： I went home at nine o'clock yesterday. （我昨天九点钟回的家.）
（2）否定句：主语+didn't +动词原形
如：I didn't go home yesterday. (我昨天没回家.)
（3）一般 疑问句：Did +主语+动词原形
如： Did you go home yesterday? (你昨天回家了吗?)
肯定回答： Yes, I did. (是的,我回了.)
否定回答：No, I didn't. (不,我没回家.)
（4）特殊疑问句：
疑问词 + did + 主语 +动词原形： eg: What did Jim do yesterday?
疑问词当主语时：疑问词+ 过去式： eg: Who went to the Great Wall yesterday?
（二）、 构成
1．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 ) eg. I was late yesterday.
( 2) are 在一般过去时中变为were ( were not = weren’t ) eg. We were at home last Sunday.
( 3) 带有was或were 的句子,其否定、疑问的变化和is, am, are一样,即否定句在was
或were后加not, 一般疑问句把was 或were 调到句首.
2．实义动词的一般过去时: 肯定句要使用动词的过去式,否定句和疑问句要使用助动词do和 does 的过去式 did.
(1). 肯定句为：主语+动词过去式+其他
如： I went home at nine o'clock yesterday. （我昨天九点钟回的家.）
（2）否定句：主语+didn't +动词原形
如：I didn't go home yesterday. (我昨天没回家.)
（3）一般 疑问句：Did +主语+动词原形
如： Did you go home yesterday? (你昨天回家了吗?)
肯定回答： Yes, I did. (是的,我回了.)
否定回答：No, I didn't. (不,我没回家.)
（4）特殊疑问句：
疑问词 + did + 主语 +动词原形： eg: What did Jim do yesterday?
疑问词当主语时：疑问词+ 过去式： eg: Who went to the Great Wall yesterday?