Grammar › N3 · 02 Time and sequence
〜かと思うと: no sooner than; just when I thought
N3 · 02 Time and sequence
Shows that one change was quickly followed by an opposite or surprising one.
Verb past form + かと思うと (かと思ったら also). Describes quick changes in another person's behavior or the weather. The speaker is observing, not acting. Compare 〜たとたん, which is about a sudden result.
Examples
赤ちゃんは笑ったかと思うと、すぐに泣き出した。
The baby laughed, and a moment later started crying.
空が晴れたかと思うと、また雨が降ってきた。
Just when it seemed the sky had cleared, it started raining again.