These are all words for a piece of work that sb has to do. 以上各词均指任务、工作。

• task a piece of work that sb has to do, especially a difficult or unpleasant one 尤指艰巨或令人厌烦的任务、工作：◆Our first task will be to set up a communications system. 我们的首项任务是架设通信系统。
• duties tasks that are part of your job 指职责、任务：◆Your duties will include setting up a new computer system. 你的职责将包括建立一个新的计算机系统。
• mission an important official job that a person or group of people is given to do, especially when they are sent to another country 指官方使命、使团的使命：◆They undertook a fact-finding mission in the region. 他们承担了在该地区核查事实的工作。
• job a piece of work that sb has to do 指一项任务、一件工作：◆I've got various jobs around the house to do. 我在家里有各种各样的活儿要干。

task or job? 用 task 还是 job？

A task may be more difficult than a job and require you to think carefully about how you are going to do it. A job may be sth small that is one of several jobs that you have to do, especially in the home; or a job can be sth that takes a long time and is boring and/or needs a lot of patience. * task 可能比 job 艰巨，需要仔细思考如何去做；job 可指许多要做的事情中的一件小事，尤指家务活；job 有时指费时、沉闷或需要极大耐心的工作。

• chore a task that you have to do regularly, especially one that you do in the home and find unpleasant or boring 指日常事务、例行工作，尤指令人厌烦或无聊的家务活：◆household chores 家务杂活

Patterns

• the task/mission/job/chore of (doing) sth
• (a) daily/day-to-day task/duties/job/chore
• (a) routine task/duties/mission/job/chore
• (a/an) easy/difficult task/mission/job
• (a) household/domestic task/duties/job/chore
• to do a task/a job/the chores
• to finish a task/a mission/a job/the chores
• to give sb a task/their duties/a mission/a job/a chore