croonBrE/kruːn/NAmE/kruːn/verbpresent simple - I / you / we / theycroonBrE/kruːn/NAmE/kruːn/present simple - he / she / itcroonsBrE/kruːnz/NAmE/kruːnz/past simplecroonedBrE/kruːnd/NAmE/kruːnd/past participlecroonedBrE/kruːnd/NAmE/kruːnd/ -ing formcrooningBrE/ˈkruːnɪŋ/NAmE/ˈkruːnɪŋ/[T, I]~ (sth)tosingsthquietlyandgently低声哼唱◆Shegentlycroonedalullaby. 她轻声哼唱了一支摇篮曲。