N2 — outside your level filter

かと思おもうと

かとおもうとka to omou toN2neutral

savor + (past) + just when it looked like X — the opposite happens right away

ajiwatta ka to omou to

just when it looked like X — the opposite happens right away

meaning: just when it looked like X — the opposite happens right away

Same meaningRelated

泣ないているかと思おもうと、もうけらけら笑わらっている。

naite iru ka to omou to, mou kerakera waratte iru.

One minute he's crying, and the next he's cackling away. neutral

帰かえってきたかと思おもったら、もう出でていったよ。

kaette kita ka to omottara, mou dete itta yo.

He'd barely got home before he was out the door again. casual

Same meaning4

just when it looked like X — right then, the opposite happens instead

泣ないているかと思おもうと、もうけらけら笑わらっている。
naite iru ka to omou to, mou kerakera waratte iru.
One minute he's crying, and the next he's cackling away. neutral
帰かえってきたかと思おもったら、もう出でていったよ。
kaette kita ka to omottara, mou dete itta yo.
He'd barely got home before he was out the door again. casual
社長しゃちょうはお戻もどりになったかと思おもうと、すぐにまたお出でかけになりました。
shachou wa o modori ni natta ka to omou to, sugu ni mata o dekake ni narimashita.
The president had barely returned before he went out again. formal

たかと思おもったらtakatoomottaracolloquial
味あじわったかと思おもったら
the everyday spoken version. It's the only one that works for something you noticed happening to you, like 開あけたかと思おもったら空からだった。
たかと思おもえばtakatoomoebaliterary
味あじわったかと思おもえば
ば swapped in for と — reads more literary, common in narration (笑わらったかと思おもえば泣ないていた).

The subject is someone you're watching, not your own planned act. No
request or command can come after it.