一般将来过去时的主动被动转换例句如下：

主动句：

I will write a letter.

被动句：A letter will be written by me.

主动句：

We will build a house.

被动句：A house will be built by us.

主动句：

He will be criticized by his teacher.

被动句：He will be criticized.

主动句：

She will be called by her friend.

被动句：She will be called.

主动句：

The book will be read by her.

被动句：The book will be read.

这些例句展示了如何将一般将来时的主动语态转换为被动语态，以及反之亦然。希望这些例子对你有所帮助。