несовер.
(что-л. ) blow about ветер развевал знамя – the banner was flapping/streaming in the wind
развев|ать - несов. (вн.) blow* (smth.) about
ветер ~ал знамёна the banners were streaming in the wind
~аться несов. flutter, fly*
с ~ющимися знамёнами with flying colours