When you want to express that a particular action or state is ongoing or continuous, there are a couple of different ways you can go about it.
The simplest way is to use 在, our location marker from earlier.
|He is playing on his phone.
|We are studying.
You can turn this into 正在 to stress the fact that the action is ongoing at that exact moment.
|I’m washing clothes right now.
An alternate way to stress the immediacy is to add 现在.
|The dog is drinking water right now.