affair: suggests action or performance and may imply a process, an operation, a proceeding, an undertaking, or a transaction: the resounding success of the whole ~.


business: stresses duty or office and implies an imposed task: quality is everyone's ~.


concern: suggests personal or direct relationship to something that has bearing on one's welfare, success, or interests: viewed the issue as of no ~ to them.   (to have bearing on: 和...有关系,对...有影响: your credibility has bearing on your success信誉关系到成功)


matter: generally refers to something being considered or being dealt with: the one remaining ~ in dispute.  （如what is the matter?什么事?）


thing: is often used when there is a desire to be vague or inexplicit: a promise to see the ~ through.


affair事务: 泛指行动或表现(如过程操作进程行动作业)，business职责: 强调职责(duty: 即义务责任obligation&responsibility)岗位(office)，有任务(task: 任务指具体的职责specific duty)，concern关心的事:  有个人或直接关系，和其福利成功利益相关，matter事情、主题: 泛指正在考虑或正在处理的事，thing事情: 希望模糊或不明确时使用


记忆方法: 1) 首字母排列为ABC MT想成母亲(MoTher)要做的三件(ABC)事<==事情

               2) 事情的意思是泛指所做所处理的事mean in general terms something done or dealt with.首字母排列为ABC MT想成母亲(MoTher)要做的三件(ABC)事<==事情