怎么样剖析Not a day passes when...句式

请老师剖析一下类似以下句子的意思与句子成分：
Not a day passes but we use electricity in our daily life.
Not a day goes by when I dont think of my old friend Jim Green.
谢谢老师！

那样你的第2句话：

Not a day goes by when I don't think of myold friend Jim Green.

= Not a day goes by but Ithink of my old friend Jim Green.

我没一天不想念老友吉姆格林。

再例：

Never a month passes but she writes to herold parents. 她没一个月不给父亲妈妈写信。