英语描述你正在做的事：I'm in/at/on

Describes an action you are doing.

描述你正在做的事。

Most commonly, you would use the word 'in' when entering a physical location such as a room or a building.

大多数情况下，你用in来表达你进入了某个物理地点。

Here are some examples:

"I'm in the shower."

"I'm in the lobby." 我在大堂。

"I'm in a car."

"I'm in a house."

"I'm in a school."

Using the word 'at' helps tell someone where you currently are. The difference between 'at' and 'in' is that the physical location is general.

用at是想告诉别人你现在在哪里。和in的区别是：这个地点更加具体。

Here are some examples:

"I'm at the grocery."

"I'm at the mall."

"I'm at the doctor's office."

"I'm at the park."

"I'm at the airport."

However, in some cases you can use 'at' and 'in' interchangeably.

在一些情况下，in和at可以替换使用。

Here are some examples:

"I'm at the mall."

"I'm in the mall."

"I'm at the park."

"I'm in the park."

"I'm at the grocery."

"I'm in the grocery."

Using the word 'on' is referring to a non physical location such as your time being utilized by something else.

用on时表示你在被某件事而占用，并不是具体的物理位置。

Here are some examples:

"I'm on the phone." 我正在打电话。

"I'm on my computer."我正在用电脑。

"I'm on a bus."