忘れたは便利なコトバ。
＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊
ですよね？
「なんて便利なコトバなんでしょう！」と理解した日から、適宜使うように努めている。
"I forgot it" is very useful, I believe.
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Isn't it?
When I got it, I started to use it when it is timely.
*not sure about my English...
