Grammar › N3 · 02 Time and sequence
〜あいだ(に): while; during
N3 · 02 Time and sequence
Marks a period during which something continues (あいだ) or happens (あいだに).
Verb te-iru form, i-adjective, or noun + の + あいだ(に). あいだ is for a state lasting through the whole period; あいだに is for one thing that happens somewhere inside it. Compare 〜うちに, which suggests a limited chance.
Examples
私が寝ているあいだに、地震があったらしい。
It seems an earthquake happened while I was sleeping.
夏休みのあいだ、ずっとアルバイトをしていた。
During the whole summer break, I worked part-time.