He posted the letter two hours ago.改为被动语态
问题描述:
He posted the letter two hours ago.改为被动语态
答
the letter was posted by him two hours ago.
答
The letter was posted by him two hours ago.
被动语态中,原句主语与宾语替换位置;而原句中谓语为过去时,letter又是单数,所以用was