1、heavy的副词是heavily。
2、heavy :adj. 重的,沉重的; 大量的,浓密的; 激烈的; 重型的; n. 重物; 庄重的角色; [例句]These scissors are awfully heavy。这把剪刀太沉了。
3、heavily。adv.在很大程度上; 沉重地; 大量地; 缓慢又高声地; [例句]'I didn't even think about her,' he said heavily.“我甚至没有想过她,”他沉重地说道。