wasn't 和weren't 是系动词be的过去时单数和复数形式.应该按系动词be的规则.如果要加动词的话,应该是过去分词,以构成过去时被动态.如:the homework wasn't done. 作业没有做. the apples weren't sold. 苹果没有卖掉.或加动词的现在分词,构成过去进行时.如:I wasn't doing my homework at this time yesterday. 我昨天这时间没有做作业.
wasn't是be动词的过去式,通常跟在人称后面,而不是前面,单数第三人称或我后面,比如I wasn't mad at him. 我不生他气.
weren't后面接动词的现在分词,构成“过去进行时” 或后面接动词的过去分词,构成“一般过去时的被动语态.如:They weren't watching TV at eight last night .The trees weren't planted last years .
一般过去式的be动词和助动词do/does的过去式为was/were 和did be动词后接名词或形容词,因此在过去时只需将be动词改成was/were即可,没有后面在接动词原形一说.在被动语态的情况下:be+动词过去分词,改为过去式就是was/were+动词过去分词 助动词do/does,过去式为did,其后才接动词原形 完成时态结构为:have/has+动词过去分词,否定式为haven't/hasn't+动词过去分词 过去进行时:was/were+动词ing,否定式为wasn't/weren't+动词
1.wasn't是be动词isn't的过去时,用于过去进行时.如:1.he wasn't at home yesterday.2.I wasn't doing my homework yesterday,I was reading books.2.didn't是“do＂ ＂does
was not be动词过去式+not