Can you finish doing it on time?

你能按时完成吗？

When will you finish doing the work?

你什么时候完成这项工作？

I will finish doing the work in two days.

两天后我将完成这项工作。

She has to finish doing her homework now.

现在，她不得不完成作业。

I will finish doing the work this Saturday.

我周六将完成做这个工作。