I plan to play with my friends at the park on the weekend.

There is no one else but me.

Let's play outside.

In addition to keys and wallets, there are many small items in my bag to take outside.

He is playing outside.

He is playing outside the house.

He is deeply interested in Buddhist teachings, but he is open to learning non-Buddhist teachings as well.

He is playing outside.

That proposal is completely unthinkable.

We are searching for extraterrestrial life.