Let's play outside.

There is no one else but me.

He is playing 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 suffered from external bleeding due to an accident.

He has experience living in a foreign country.

That proposal is completely unthinkable.