一般過去將來時
形式：would+動詞原形；was/were going to+動詞原形
用于描述過去的時間點上對未來事件的看法和猜想。

過去將來進行時
形式：would/should be doing
用于描述過去某個時間點對未來某時間正在發(fā)生的事情的猜想。

例句對比：
（1）
He said that she would have dinner with her friend tomorrow. 他說她明天會和朋友一起吃飯。
He said that she would be having dinner with her friend at 6 tomorrow. 他說她明天6點會在和朋友吃飯。

（2）
He said that he wouldn't come. 他說他不會來。
He said that he could not come because he would be having a meeting. 他說他不能來因為要開會。

（3）
You told me that Jack would finish his homework. 你告訴我杰克會做完他的作業(yè)。
You told me that Jack would be doing his homework tonight. 你告訴我杰克今晚會在做作業(yè)。

（4）
I knew that she would write a letter to her boyfriend. 我知道她會給她男朋友寫信。
I knew that she would be wring a letter to her boyfriend. 我知道她正在給她男朋友寫信。

（5）
He asked me what I would do tomorrow. 他問我明天會做什么。
He asked me what I should be doing six o'clock tomorrow. 他問我次日六點將正在做什么。

同一般將來時和將來進行時的區(qū)別一樣，一般過去將來時和過去將來進行時的區(qū)別在于是否為持續(xù)性動作。請仔細留意從句中是否有具體的時間點。