busily doing sth
busily 后接动词的 -ing 形式，强调“忙着做某事”的状态。
She was busily preparing the evening meal.
她正忙着准备晚餐。
忙碌地
忙碌地；积极地
in a busy manner
忙碌地；积极地
In a busy manner; actively.
She was busily preparing dinner when the phone rang.
她正忙着准备晚餐，这时电话响了。
用法提示：副词‘busily’修饰动词‘preparing’，表示‘忙碌地’。
The workers were busily loading boxes onto the truck.
工人们正忙着把箱子装上卡车。
用法提示：副词‘busily’修饰动词‘loading’，强调动作的忙碌状态。
He busily checked his messages while waiting for the train.
他在等火车时忙着查看信息。
用法提示：副词‘busily’修饰动词‘checked’，说明‘查看’这一动作是匆忙进行的。
busily 后接动词的 -ing 形式，强调“忙着做某事”的状态。
She was busily preparing the evening meal.
她正忙着准备晚餐。
be engaged in 后接名词或动名词，busily 修饰整个表语结构，表示“投入地忙于”。
The researchers were busily engaged in the experiment.
研究人员正忙着做实验。
busily 常直接放在谓语动词前，表示动作进行得匆忙而专注。
He busily typed the report before the deadline.
他在截止日期前忙着打报告。
强调参与和主动性，不一定暗示“忙”；如 actively participate 不宜换成 busily.
较正式，强调勤劳刻苦，常用于工作、学习；与 busily 相比多了一层“努力”的意味。
强调认真负责、坚持不懈，未必指手头事务繁多；适合描述尽责的态度。
侧重动作快速、有活力，常见于走路、销售等；若只是说“忙于做某事”则不适用。
grammar · medium
易错句子She is busily.
正确表达She is busy.
busily 是副词，不能放在系动词 is 后面作表语；表示“她很忙”时应用形容词 busy。
grammar · medium
易错句子He is a busily worker.
正确表达He is a busy worker.
busily 是副词，不能用来修饰名词作定语；修饰名词 worker 要用形容词 busy。
busily 是副词，修饰动作，作状语；busy 是形容词，表示状态，作表语或定语。
busily 强调某人忙忙碌碌地做某事；bustling 形容场所或场面喧闹繁忙、充满活力。
busily 指手头事务多、不停活动；diligently 强调认真勤勉、坚持不懈。
忙于（做某事）
The children were busily engaged in building a sandcastle.
孩子们正忙于堆沙堡。
埋头写
She was busily writing in her journal.
她正埋头写日记。
忙着准备
The chef was busily preparing the evening meal.
厨师正忙着准备晚餐。
忙着装饰
They were busily decorating the room for the birthday party.
他们正忙着装饰房间，准备生日聚会。
忙着采集
The children were busily collecting shells on the beach.
孩子们在海滩上忙着捡贝壳。
busy（词根，忙碌的）+ -ly（副词后缀，y变i）
忙碌地通常用来描述处理多项任务时的状态。
临近截止日期时，人们常忙碌地赶工。
忙碌地工作常发生在工作区，指人在其中来回忙碌。
紧凑的日程安排往往让人忙碌地应对各项事务。
忙碌地也常用于描述外出办理琐碎事务时的匆忙样子。
Dictionary facts from ECDICT, WIKTIONARY.