jiàoliàn zhèngzài yòng pǎobùjī.

progressive marker

Breakdown of jiàoliàn zhèngzài yòng pǎobùjī.

• 用yòng: to use
• 教练jiàoliàn: coach; trainer

Questions & Answers about jiàoliàn zhèngzài yòng pǎobùjī.

What does 正在 do in this sentence?

正在 marks an action as in progress right now. It is one common way to express the idea of English be doing.

So:

教练正在用跑步机。

means the coach is currently using the treadmill.

A few useful comparisons:

• 教练用跑步机。 = The coach uses / is using the treadmill.
  
  • This is more neutral and does not emphasize the ongoing action as strongly.
• 教练在用跑步机。 = Also very common for is using.
• 教练正在用跑步机。 = Slightly more explicit about right now, in the middle of the action.

Why is 用 used here?

用 means to use.

In this sentence, the pattern is:

Subject + 正在 + 用 + object

So:

• 教练 = coach
• 正在 = in the middle of
• 用 = use
• 跑步机 = treadmill

That gives the idea The coach is using the treadmill.

This is natural if you want to talk generally about using that piece of equipment. If you specifically want to say the coach is running on it, Chinese often says:

教练正在跑步机上跑步。

That is more specific than 用跑步机.

Is this sentence natural, or would native speakers say it differently?