英语翻译

问题描述:

英语翻译
i am glad not to have been seen by him yesterday.

glad 高兴的,欢喜的;使人高兴的,令人快乐的;乐意的,情愿的
本句是现在完成时的被动语态.
have been seen 被动 语法:be done
本句意思:我高兴昨天没被他看到.
by被谁