Ｗhen I searched the Internet I found the phrase
So, what is the reason for replacing the particle を with も?
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Unlike English "also", the particle も can be used when there is no explicit "similar" thing specified in the context. In such cases, も is closer to "even". Either way, the basic rule is も replaces を (and が, は).
- 笑っている人もいた。 There are even laughing people.
- 天才もミスをする。 Even a genius makes mistakes.
- 時が経つのを忘れた。 I forgot about the (passage of) time.
- 時が経つのも忘れた。 I forgot even about the (passage of) time.
Keeping を and saying 時が経つのをも忘れさせる is actually grammatical, too, but it sounds fairly stilted. See: