while I was washing my hair中的动词是过去未完成时。
In 'while I was washing my hair', the verb is in the imperfect.
在将一个项目添加到该队列时，未完成的任务的总数就会增加。
The count of unfinished tasks goes up whenever an item is added to the queue.
当拥有者将尚未完成的工作委派给同事时，可以使用后续任务，并且由新的后续任务的拥有者负责该任务的完成。
A follow-on task is used when the owner delegates unfinished work to a colleague and the owner of the new follow-on task becomes responsible for completion of the task.
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