“了” 一般形态 Be 动词 Be 动词的一般过去时态.在没有实义动词的句子中使用be动词, am/is 的过去式为was; are的过去式为were.构成:肯定句:主语+was (were) +表语如:I was late yesterday. (昨天我迟到了。)否定句:主语+was (were) +not+表语如:We weren't late yesterday. (我们昨天没有迟到)【注意】:当句中含有系动词was,were时,可直接在其后加not构成否定句。如:I was on the Internetwhen you called me.当你打电话给我时,我在上网。→ :I was not/wasn't on the Internet when you called me .当你打电话给我时,我不在上网。疑问句:Was (Were) +主语+表语当谓语动词提前并直接或间接表达注意时态特殊疑问句:特殊疑问词+was (were) +主语+表语 实义动词 实义动词的一般过去时态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.否定句:主语+didn't +动词原形+宾语疑问句:Did +主语+动词原形+宾语 助动词和情态动词 助动词和情态动词过去式如下:shall―should(将要)用于第一人称单数will―would(将要)用于所有人称can—could(能,会) may―might(可以) must―must (必须)have to―had to(不得不)助动词和情态动词的过去时态要使用他们的过去式,后面的动词还使用原形。如:I had to do my homework yesterday. (昨天我不得不做作业。) 语法讲解 一般过去时也叫单纯过去时。例A:Mr. Smith boughta new car yesterday.(史密斯先生昨天买了一辆新车。)例B:They were here only a few minutes ago.(几分钟前他们还在这里。)一般过去时的用法如下:一般过去时最明显的现象就是常由表达过去之时间的副词或副词短语来修饰它(如各例句的斜体字部分)。这些常用于修饰一般过去时的副词有:yesterday,yesterday morning (afternoon,evening ),jus