Call off 表示取消计划好的活动，或停止已经开始的行动：call off the wedding、call off the search。它常用于情况变化后，继续举办或进行已不合适的情境。
想在对话中用 call off 吗？
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call off + noun; call + noun + off; call it off
- They called off the wedding just two weeks before the big day.
- The strike was called off after the company agreed to raise wages.
- We had to call the meeting off because the client's flight was cancelled.
修改原因
修改前Only five people signed up for the workshop, so the organisers decided to call off it.
修改后Only five people signed up for the workshop, so the organisers decided to call it off.
Call off 是可分开的短语动词。名词宾语可以放在 off 后：call off the picnic，也可以放在中间：call the picnic off。但 it、them 等代词必须放在两部分之间：call it off，不说 call off it。
Call off 表示取消，put off 表示推迟。比较：The match was called off 表示这场比赛取消了；The match was put off until Sunday 则表示改到周日，仍计划举行。Call it a day 是另一个表达，意思是结束当天的工作。
动手练习
The picnic was planned for Saturday, but it started raining hard, so we had to ___.
查看答案
call it off — It 代指野餐，作为代词必须放在 call 和 off 中间，因此选 call it off。这里不能把代词放在 off 后面写成 call off it。
描述一次因天气、疾病或其他情况而取消计划的经历。说明取消了什么，以及原因。
We had to call off our weekend trip to the coast because my son came down with a fever the night before.
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