いつの間にか猫がいなくなっていた。
Before I knew it, the cat had disappeared.
Listen to pronunciation
Example sentences
いつの間にか外は暗くなっていた。
Before I knew it, it had become dark outside.
日本に来てから、いつの間にか三ヶ月が経った。
Three months have passed since I came to Japan before I knew it.
いつの間にか、彼は弟の背丈を追い越していた
Before he knew it, he had overtaken his younger brother's height.
都会の騒音にも、いつの間にか聞き慣れてしまった。
I've become used to the city noise before I even knew it.
Usage Notes
Used when something happens without being noticed until after the fact.
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