忘记了做过某事英文怎么说

在英语中，忘记了做过某事可以用 "forget to do something" 来表达。

例如：

I forgot to turn off the pghts before I left the house. (我忘记在离家之前关灯了。)
She forgot to buy milk at the store. (她忘记在商店里买牛奶了。)

"Forget to do something" 这个短语的来源是由两个单词 "forget" 和 "to" 组成的，其中 "forget" 是动词，意思是 "忘记"；"to" 是介词，用来表示动作的目的或方向。

下面是一些更多的例句：

I forgot to send the email. (我忘记发邮件了。)
He forgot to lock the door. (他忘记锁门了。)
She forgot to bring her phone charger. (她忘记带手机充电器了。)
They forgot to turn in their homework. (他们忘记把家庭作业交了。)