am is 的過去式為was are的過去式為were.
當主語是第一人稱單數或第三人稱單數時,謂語動詞用was
主語是第二人稱或其他人稱複數時,謂語動詞用were。
肯定句:主語+was (were) +表語+其他
I was late yesterday. (昨天我遲到了。)
否定句:主語 + wasn't/ weren't + 表語 + 其他
並且was, were與not可以縮寫成wasn't, weren't。
I was not (=wasn't) here yesterday. 昨天我不在這兒。
My parents were not (=weren't) at home last Sunday.上週日我父母不在家
一般疑問句:Was(Were) + 主語 +表語 + 其他
把was, were提到句首,句末用問號即可變為一般疑問句
肯定回答用“Yes, 主語+was/were.”
否定回答用“No,主語+wasn't/weren't.
Were you ill yesterday? (你昨天病了嗎)
肯定回 Yes, I was. (是的,我病了。)
否定句: No, I wasn't. (不,我沒病。)