Was和Were是过去时的两个助动词，但其用法存在细微差别。

Was和Were：用法区别

Was

主语为单数第三人称（he、she、it） 例如： He was a kind man.（他是一个善良的人。） She was very happy.（她非常开心。） It was a sunny day.（那是一个阳光明媚的日子。）

Were

主语为复数第三人称（they、we、you） 例如： They were very friendly.（他们非常友好。） We were so excited.（我们太兴奋了。） You were late for the meeting.（你迟到了会议。）

主语为单数或复数，表示被动语态 例如： The house was built in 1950.（这所房子建于1950年。） The flowers were picked by my mother.（这些花是我母亲采摘的。）

与if从句连用，表示假设或不真实的情况 例如： If I were you, I would do it.（如果我是你，我会这么做。） If there were no rules, chaos would ensue.（如果没有规则，将一片混乱。）

注意：

在陈述句中，was和were后通常紧跟过去分词。 在疑问句中，was和were提前至主语之前。 在否定句中，否定词not置于was或were之后。

总结示例

单数第三人称 主动语态： He was a good student. 复数第三人称 主动语态： They were at the park. 单数或复数 被动语态： The car was washed yesterday. 假设或不真实的情况： If I were a bird, I would fly away.