they're (doing something)

In casual speech, you can use "they're ___ing" when you don't know or don't care who's doing the action. Another example:

Look at that (pointing to a sign) - they raised the price of gas again!

In formal situations, when you want to express what an unknown person or group has done, use this structure:

Did you know that a new Ghostbusters movie is being made with the original cast?

This phrase appears in these lessons: