1.概念：表示就过去某一时间而言，将来某一时刻或某一段时间正在进行的动作，主要用于宾语从句中，尤其多用于间接引语中。

2.基本结构：should/would + be +现在分词

3.例句：They said they would be coming.他们说了他们将要来。

He said he could not come because he would be having a meeting.他说他不能来因为要开会。